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• Using unordered_multimap as entity and component storage

  - by natebot13

  The Setup I've made a few games (more like animations) using the Object Oriented method with base classes for objects that extend them, and objects that extend those, and found I couldn't wrap my head around expanding that system to larger game ideas. So I did some research and discovered the Entity-Component system of designing games. I really like the idea, and thoroughly understood the usefulness of it after reading Byte54's perfect answer here: Role of systems in entity systems architecture. With that said, I have decided to create my current game idea using the described Entity-Component system. Having basic knowledge of C++, and SFML, I would like to implement the backbone of this entity component system using an unordered_multimap without classes for the entities themselves. Here's the idea: An unordered_mulitmap stores entity IDs as the lookup term, while the value is an inherited Component object. Examlpe: ____________________________ |ID |Component | ---------------------------- |0 |Movable | |0 |Accelable | |0 |Renderable | |1 |Movable | |1 |Renderable | |2 |Renderable | ---------------------------- So, according to this map of objects, the entity with ID 0 has three components: Movable, Accelable, and Renderable. These component objects store the entity specific data, such as the location, the acceleration, and render flags. The entity is simply and ID, with the components attached to that ID describing its attributes. Problem I want to store the component objects within the map, allowing the map have full ownership of the components. The problem I'm having, is I don't quite understand enough about pointers, shared pointers, and references in order to get that set up. How can I go about initializing these components, with their various member variables, within the unordered_multimap? Can the base component class take on the member variables of its child classes, when defining the map as unordered_multimap<int, component>? Requirements I need a system to be able to grab an entity, with all of its' attached components, and access members from the components in order to do the necessary calculations and reassignments for position, velocity, etc. Need a clarification? Post a comment with your concerns and I will gladly edit or comment back! Thanks in advance! natebot13

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• Efficiently separating Read/Compute/Write steps for concurrent processing of entities in Entity/Component systems

  - by TravisG

  Setup I have an entity-component architecture where Entities can have a set of attributes (which are pure data with no behavior) and there exist systems that run the entity logic which act on that data. Essentially, in somewhat pseudo-code: Entity { id; map<id_type, Attribute> attributes; } System { update(); vector<Entity> entities; } A system that just moves along all entities at a constant rate might be MovementSystem extends System { update() { for each entity in entities position = entity.attributes["position"]; position += vec3(1,1,1); } } Essentially, I'm trying to parallelise update() as efficiently as possible. This can be done by running entire systems in parallel, or by giving each update() of one system a couple of components so different threads can execute the update of the same system, but for a different subset of entities registered with that system. Problem In reality, these systems sometimes require that entities interact(/read/write data from/to) each other, sometimes within the same system (e.g. an AI system that reads state from other entities surrounding the current processed entity), but sometimes between different systems that depend on each other (i.e. a movement system that requires data from a system that processes user input). Now, when trying to parallelize the update phases of entity/component systems, the phases in which data (components/attributes) from Entities are read and used to compute something, and the phase where the modified data is written back to entities need to be separated in order to avoid data races. Otherwise the only way (not taking into account just "critical section"ing everything) to avoid them is to serialize parts of the update process that depend on other parts. This seems ugly. To me it would seem more elegant to be able to (ideally) have all processing running in parallel, where a system may read data from all entities as it wishes, but doesn't write modifications to that data back until some later point. The fact that this is even possible is based on the assumption that modification write-backs are usually very small in complexity, and don't require much performance, whereas computations are very expensive (relatively). So the overhead added by a delayed-write phase might be evened out by more efficient updating of entities (by having threads work more % of the time instead of waiting). A concrete example of this might be a system that updates physics. The system needs to both read and write a lot of data to and from entities. Optimally, there would be a system in place where all available threads update a subset of all entities registered with the physics system. In the case of the physics system this isn't trivially possible because of race conditions. So without a workaround, we would have to find other systems to run in parallel (which don't modify the same data as the physics system), other wise the remaining threads are waiting and wasting time. However, that has disadvantages Practically, the L3 cache is pretty much always better utilized when updating a large system with multiple threads, as opposed to multiple systems at once, which all act on different sets of data. Finding and assembling other systems to run in parallel can be extremely time consuming to design well enough to optimize performance. Sometimes, it might even not be possible at all because a system just depends on data that is touched by all other systems. Solution? In my thinking, a possible solution would be a system where reading/updating and writing of data is separated, so that in one expensive phase, systems only read data and compute what they need to compute, and then in a separate, performance-wise cheap, write phase, attributes of entities that needed to be modified are finally written back to the entities. The Question How might such a system be implemented to achieve optimal performance, as well as making programmer life easier? What are the implementation details of such a system and what might have to be changed in the existing EC-architecture to accommodate this solution?

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• Entity Framework won't SaveChanges on new entity with two-level relationship

  - by Tim Rourke

  I'm building an ASP.NET MVC site using the ADO.NET Entity Framework. I have an entity model that includes these entities, associated by foreign keys: Report(ID, Date, Heading, Report_Type_ID, etc.) SubReport(ID, ReportText, etc.) - one-to-one relationship with Report. ReportSource(ID, Name, Description) - one-to-many relationship with Sub_Report. ReportSourceType(ID, Name, Description) - one-to-many relationship with ReportSource. Contact (ID, Name, Address, etc.) - one-to-one relationship with Report_Source. There is a Create.aspx page for each type of SubReport. The post event method returns a new Sub_Report entity. Before, in my post method, I followed this process: Set the properties for a new Report entity from the page's fields. Set the SubReport entity's specific properties from the page's fields. Set the SubReport entity's Report to the new Report entity created in 1. Given an ID provided by the page, look up the ReportSource and set the Sub_Report entity's ReportSource to the found entity. SaveChanges. This workflow succeeded just fine for a couple of weeks. Then last week something changed and it doesn't work any more. Now instead of the save operation, I get this Exception: UpdateException: "Entities in 'DIR2_5Entities.ReportSourceSet' participate in the 'FK_ReportSources_ReportSourceTypes' relationship. 0 related 'ReportSourceTypes' were found. 1 'Report_Source_Types' is expected." The debug visualizer shows the following: The SubReport's ReportSource is set and loaded, and all of its properties are correct. The Report_Source has a valid ReportSourceType entity attached. In SQL Profiler the prepared SQL statement looks OK. Can anybody point me to what obvious thing I'm missing? TIA Notes: The Report and SubReport are always new entities in this case. The Report entity contains properties common to many types of reports and is used for generic queries. SubReports are specific reports with extra parameters varying by type. There is actually a different entity set for each type of SubReport, but this question applies to all of them, so I use SubReport as a simplified example.

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• State / Screen management in Entity Component Systems

  - by David Lively

  My entity/component system is happily humming along and, despite some performance concerns I initially had, everything is working fine. However, I've realized that I missed a crucial point when starting this thing: how do you handle different screens? At the moment, I have a GameManager class which owns a component manager and entity manager. When I create an entity, the entity manager assigns it an ID and makes sure it's tracked. When I modify the components that are assigned to an entity. an UpdateEntity method is called, which alerts each of the systems that they may need to add or remove the entity from their respective entity lists. A problem with this is that the collection of entities operated on by each system is determined solely by the individual Systems, typically based on a "required component" filter. (An entity has to have a Renderable component to be rendered, for instance.) In this situation, I can't just keep collections of entities per screen and only Update/Draw those collections. They'd have to either be added and removed depending on their applicability to the current screen, which would cause their associated components to be removed, or enable/disable entities in a group per screen to hide what's not supposed to be visible. These approaches seem like really, really crappy kludges. What's a good way to handle this? A pretty straightforward way that comes to mind is to create a separate GameManager (which in my implementation owns all of the systems, entities, etc.) per screen, which means that everything outside of the device context would be duplicated. That's bothersome because some things are always visible, or I might want to continue to display the game under a translucent menu window. Another option would be to add a "layer" key to the GameManager class, which could be checked against a displayable layer stack held by the game manager. *System.Draw() would be called for each active layer, in the required order as determined by the stack. When the systems request an iterator for their respective entity collections, it would be pre-filtered to a (cached) set of those entities that participate in the active layer. Those collections could be updated from the same UpdateEntity event that's already used to maintain each system's entity collections. Still, kinda feels like a hack. If I've coded myself into a corner, feel free to throw tomatoes as long as they're labeled with a helpful suggestion. Hooray for learning curves.

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• Entity Framework 4.1 Release Candidate Released

  - by shiju

  Microsoft ADO.NET team has announced the Release Candidate version of Entity Framework 4.1. You can download the  Entity Framework 4.1 Release Candidate from here . You can also use NuGet to get Entity Framework 4.1 Release Candidate. The Code First approach is available with Entity Framework 4.1.I have upgraded my ASP.NET MVC 3/EF Code First demo web app (http://efmvc.codeplex.com) to Entity Framework 4.1  version

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• Entity Framework 4.0: My Favorite Books

  - by nannette

  I'm in the process of reading several Entity Framework 4.0 books. I'm going to recommend two such books: 1) Programming Entity Framework: Building Data Centric Apps with the ADO.NET Entity Framework by Julia Lerman 2) Entity Framework 4.0 Recipes: A Problem-Solution Approach by Larry Tenny and Zeeshan Hirani Visit these Entity Framework 4.0 Quick Start videos by Julia Lerman. The book links include numerous detailed reviews. If you can only afford one of the books, I'd recommend Julia's book as the...(read more)

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• Many sources of movement in an entity system

  - by Sticky

  I'm fairly new to the idea of entity systems, having read a bunch of stuff (most usefully, this great blog and this answer). Though I'm having a little trouble understanding how something as simple as being able to manipualate the position of an object by an undefined number of sources. That is, I have my entity, which has a position component. I then have some event in the game which tells this entity to move a given distance, in a given time. These events can happen at any time, and will have different values for position and time. The result is that they'd be compounded together. In a traditional OO solution, I'd have some sort of MoveBy class, that contains the distance/time, and an array of those inside my game object class. Each frame, I'd iterate through all the MoveBy, and apply it to the position. If a MoveBy has reached its finish time, remove it from the array. With the entity system, I'm a little confused as how I should replicate this sort of behavior. If there were just one of these at a time, instead of being able to compound them together, it'd be fairly straightforward (I believe) and look something like this: PositionComponent containing x, y MoveByComponent containing x, y, time Entity which has both a PositionComponent and a MoveByComponent MoveBySystem that looks for an entity with both these components, and adds the value of MoveByComponent to the PositionComponent. When the time is reached, it removes the component from that entity. I'm a bit confused as to how I'd do the same thing with many move by's. My initial thoughts are that I would have: PositionComponent, MoveByComponent the same as above MoveByCollectionComponent which contains an array of MoveByComponents MoveByCollectionSystem that looks for an entity with a PositionComponent and a MoveByCollectionComponent, iterating through the MoveByComponents inside it, applying/removing as necessary. I guess this is a more general problem, of having many of the same component, and wanting a corresponding system to act on each one. My entities contain their components inside a hash of component type - component, so strictly have only 1 component of a particular type per entity. Is this the right way to be looking at this? Should an entity only ever have one component of a given type at all times?

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• Organizing an entity system with external component managers?

  - by Gustav

  I'm designing a game engine for a top-down multiplayer 2D shooter game, which I want to be reasonably reuseable for other top-down shooter games. At the moment I'm thinking about how something like an entity system in it should be designed. First I thought about this: I have a class called EntityManager. It should implement a method called Update and another one called Draw. The reason for me separating Logic and Rendering is because then I can omit the Draw method if running a standalone server. EntityManager owns a list of objects of type BaseEntity. Each entity owns a list of components such as EntityModel (the drawable representation of an entity), EntityNetworkInterface, and EntityPhysicalBody. EntityManager also owns a list of component managers like EntityRenderManager, EntityNetworkManager and EntityPhysicsManager. Each component manager keeps references to the entity components. There are various reasons for moving this code out of the entity's own class and do it collectively instead. For example, I'm using an external physics library, Box2D, for the game. In Box2D, you first add the bodies and shapes to a world (owned by the EntityPhysicsManager in this case) and add collision callbacks (which would be dispatched to the entity object itself in my system). Then you run a function which simulates everything in the system. I find it hard to find a better solution to do this than doing it in an external component manager like this. Entity creation is done like this: EntityManager implements the method RegisterEntity(entityClass, factory) which registers how to create an entity if that class. It also implements the method CreateEntity(entityClass) which would return an object of type BaseEntity. Well now comes my problem: How would the reference to a component be registered to the component managers? I have no idea how I would reference the component managers from a factory/closure.

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• Prevent Custom Entity being deleted from Entity Framework during Update Model Wizard

  - by rbg

  In Entity Framework v1 If you create a Custom Entity to map it to a Stored Procedure during FunctionImport and then Select "Update Model from Database" the Update Model Wizard removes the Custom Entity (as added Manually in the SSDL XML prior to functionImport) from the SSDL. Does anyone know if this limitation has been dealt with Entity Framework v4? I mean is there a way to prevent the Wizard from removing the Custom Entity from the Storage Schema (SSDL) during Model Update from Database????

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• Hibernate is persisting entity during flush when the entity has not changed

  - by Preston

  I'm having a problem where the entity manger is persisting an entity that I don't think has changed during the flush. I know the following code is the problem because if I comment it out the entity doesn't persist. In this code all I'm doing is loading the entity and calling some getters. Query qry = em.createNamedQuery("Clients.findByClientID"); qry.setParameter("clientID", clientID); Clients client = (Clients) qry.getSingleResult(); results.setFname(client.getFirstName()); results.setLname(client.getLastName()); ... return results; Later in a different method I do another namedQuery which causes the entity manger to flush. For some reason the client loaded above is persisted. The reason this is a problem is because in the middle of all this, there is some old code that is making some straight JDBC changes to the client. When the entity manger persists the changes made by the straight JDBC are lost. The theory we have at moment is that the entity manger is comparing the entity to the underlying record, sees that it's different, then persists it. Can someone explain or confirm the behavior we're seeing?

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• System.InvalidOperationException compiling ASP.NET app on Mono

  - by Radu094

  This is the error I get when I start my ASP.NET application in Mono: System.InvalidOperationException: The process must exit before getting the requested information. at System.Diagnostics.Process.get_ExitCode () [0x00044] in /usr/src/mono-2.6.3/mcs/class/System/System.Diagnostics/Process.cs:149 at (wrapper remoting-invoke-with-check) System.Diagnostics.Process:get_ExitCode () at Mono.CSharp.CSharpCodeCompiler.CompileFromFileBatch (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x001ee] in /usr/src/mono-2.6.3/mcs/class/System/Microsoft.CSharp/CSharpCodeCompiler.cs:267 at Mono.CSharp.CSharpCodeCompiler.CompileAssemblyFromFileBatch (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00011] in /usr/src/mono-2.6.3/mcs/class/System/Microsoft.CSharp/CSharpCodeCompiler.cs:156 at System.CodeDom.Compiler.CodeDomProvider.CompileAssemblyFromFile (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00014] in /usr/src/mono-2.6.3/mcs/class/System/System.CodeDom.Compiler/CodeDomProvider.cs:119 at System.Web.Compilation.AssemblyBuilder.BuildAssembly (System.Web.VirtualPath virtualPath, System.CodeDom.Compiler.CompilerParameters options) [0x0022f] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/AssemblyBuilder.cs:804 at System.Web.Compilation.AssemblyBuilder.BuildAssembly (System.Web.VirtualPath virtualPath) [0x00000] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/AssemblyBuilder.cs:730 at System.Web.Compilation.BuildManager.GenerateAssembly (System.Web.Compilation.AssemblyBuilder abuilder, System.Web.Compilation.BuildProviderGroup group, System.Web.VirtualPath vp, Boolean debug) [0x00254] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/BuildManager.cs:624 at System.Web.Compilation.BuildManager.BuildInner (System.Web.VirtualPath vp, Boolean debug) [0x0011c] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/BuildManager.cs:411 at System.Web.Compilation.BuildManager.Build (System.Web.VirtualPath vp) [0x00050] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/BuildManager.cs:356 at System.Web.Compilation.BuildManager.GetCompiledType (System.Web.VirtualPath virtualPath) [0x0003a] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/BuildManager.cs:803 at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath (System.Web.VirtualPath virtualPath, System.Type requiredBaseType) [0x0000c] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.Compilation/BuildManager.cs:500 at System.Web.UI.PageParser.GetCompiledPageInstance (System.String virtualPath, System.String inputFile, System.Web.HttpContext context) [0x0001c] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.UI/PageParser.cs:161 at System.Web.UI.PageHandlerFactory.GetHandler (System.Web.HttpContext context, System.String requestType, System.String url, System.String path) [0x00000] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web.UI/PageHandlerFactory.cs:45 at System.Web.HttpApplication.GetHandler (System.Web.HttpContext context, System.String url, Boolean ignoreContextHandler) [0x00055] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web/HttpApplication.cs:1643 at System.Web.HttpApplication.GetHandler (System.Web.HttpContext context, System.String url) [0x00000] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web/HttpApplication.cs:1624 at System.Web.HttpApplication+<Pipeline>c__Iterator2.MoveNext () [0x0075f] in /usr/src/mono-2.6.3/mcs/class/System.Web/System.Web/HttpApplication.cs:1259 I checked the source code indicated by the stacktrace, namely :CSharpCodeCompiler.cs:267 mcs.WaitForExit(); result.NativeCompilerReturnValue = mcs.ExitCode; //this throws the exception I have no ideea if this is a bug in Mono, or if my App is doing something it shoudn't. A simple "Hello World" application indicates that Mono is properly installed and working, It is just my app that is causing this exception to be thrown. Hoping some enlighted minds have more on the issue

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• Entity System with C++

  - by Dono

  I'm working on a game engine using the Entity System and I have some questions. How I see Entity System : Components : A class with attributs, set and get. Sprite Physicbody SpaceShip ... System : A class with a list of components. (Component logic) EntityManager Renderer Input Camera ... Entity : Just a empty class with a list of components. What I've done : Currently, I've got a program who allow me to do that : // Create a new entity/ Entity* entity = game.createEntity(); // Add some components. entity->addComponent( new TransformableComponent() ) ->setPosition( 15, 50 ) ->setRotation( 90 ) ->addComponent( new PhysicComponent() ) ->setMass( 70 ) ->addComponent( new SpriteComponent() ) ->setTexture( "name.png" ) ->addToSystem( new RendererSystem() ); My questions Did the system stock a list of components or a list of entities ? In the case where I stock a list of entities, I need to get the component of this entities on each frame, that's probably heavy isn't it ? Did the system stock a list of components or a list of entities ? In the case where I stock a list of entities, I need to get the component of this entities on each frame, that's probably heavy isn't it ?

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• Entity framework, adding custom entity to diagram

  - by molgan

  Hello I'm using the entity framework that comes with 3.5sp1, and I'm trying to add a custom entity that I will propulate with searchresults from a stored procedure. But I have problems with the designer....... when I pick "Add + Entity" and give it a name, and hit save, the whole diagram stops working...... blah entities namespace could not be found..... all the other entities have lost its reference or summet. Works when I add a "table" to it that exists in database. But when custom it screws everything up. How should I fix this? I've imported the function, I just need to add an entity for it... I've read http://blogs.microsoft.co.il/blogs/gilf/archive/2009/03/13/mapping-stored-procedure-results-to-a-custom-entity-in-entity-framework.aspx but I cant get to step 3 since of all the errors when saving on step 2. /M

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• Getting MySQL work with Entity Framework 4.0

  - by DigiMortal

  Does MySQL work with Entity Framework 4.0? The answer is: yes, it works! I just put up one experimental project to play with MySQL and Entity Framework 4.0 and in this posting I will show you how to get MySQL data to EF. Also I will give some suggestions how to deploy your applications to hosting and cloud environments. MySQL stuff As you may guess you need MySQL running somewhere. I have MySQL installed to my development machine so I can also develop stuff when I’m offline. The other thing you need is MySQL Connector for .NET Framework. Currently there is available development version of MySQL Connector/NET 6.3.5 that supports Visual Studio 2010. Before you start download MySQL and Connector/NET: MySQL Community Server Connector/NET 6.3.5 If you are not big fan of phpMyAdmin then you can try out free desktop client for MySQL – HeidiSQL. I am using it and I am really happy with this program. NB! If you just put up MySQL then create also database with couple of table there. To use all features of Entity Framework 4.0 I suggest you to use InnoDB or other engine that has support for foreign keys. Connecting MySQL to Entity Framework 4.0 Now create simple console project using Visual Studio 2010 and go through the following steps. 1. Add new ADO.NET Entity Data Model to your project. For model insert the name that is informative and that you are able later recognize. Now you can choose how you want to create your model. Select “Generate from database” and click OK. 2. Set up database connection Change data connection and select MySQL Database as data source. You may also need to set provider – there is only one choice. Select it if data provider combo shows empty value. Click OK and insert connection information you are asked about. Don’t forget to click test connection button to see if your connection data is okay. If everything works then click OK. 3. Insert context name Now you should see the following dialog. Insert your data model name for application configuration file and click OK. Click next button. 4. Select tables for model Now you can select tables and views your classes are based on. I have small database with events data. Uncheck the checkbox “Include foreign key columns in the model” – it is damn annoying to get them away from model later. Also insert informative and easy to remember name for your model. Click finish button. 5. Define your classes Now it’s time to define your classes. Here you can see what Entity Framework generated for you. Relations were detected automatically – that’s why we needed foreign keys. The names of classes and their members are not nice yet. After some modifications my class model looks like on the following diagram. Note that I removed attendees navigation property from person class. Now my classes look nice and they follow conventions I am using when naming classes and their members. NB! Don’t forget to see properties of classes (properties windows) and modify their set names if set names contain numbers (I changed set name for Entity from Entity1 to Entities). 6. Let’s test! Now let’s write simple testing program to see if MySQL data runs through Entity Framework 4.0 as expected. My program looks for events where I attended. using(var context = new MySqlEntities()) {     var myEvents = from e in context.Events                     from a in e.Attendees                     where a.Person.FirstName == "Gunnar" &&                             a.Person.LastName == "Peipman"                     select e;       Console.WriteLine("My events: ");       foreach(var e in myEvents)     {         Console.WriteLine(e.Title);     } }   Console.ReadKey(); And when I run it I get the result shown on screenshot on right. I checked out from database and these results are correct. At first run connector seems to work slow but this is only the effect of first run. As connector is loaded to memory by Entity Framework it works fast from this point on. Now let’s see what we have to do to get our program work in hosting and cloud environments where MySQL connector is not installed. Deploying application to hosting and cloud environments If your hosting or cloud environment has no MySQL connector installed you have to provide MySQL connector assemblies with your project. Add the following assemblies to your project’s bin folder and include them to your project (otherwise they are not packaged by WebDeploy and Azure tools): MySQL.Data MySQL.Data.Entity MySQL.Web You can also add references to these assemblies and mark references as local so these assemblies are copied to binary folder of your application. If you have references to these assemblies then you don’t have to include them to your project from bin folder. Also add the following block to your application configuration file. <?xml version="1.0" encoding="utf-8"?> <configuration> ...   <system.data>     <DbProviderFactories>         <add              name=”MySQL Data Provider”              invariant=”MySql.Data.MySqlClient”              description=”.Net Framework Data Provider for MySQL”              type=”MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data,                   Version=6.2.0.0, Culture=neutral,                   PublicKeyToken=c5687fc88969c44d”          />     </DbProviderFactories>   </system.data> ... </configuration> Conclusion It was not hard to get MySQL connector installed and MySQL connected to Entity Framework 4.0. To use full power of Entity Framework we used InnoDB engine because it supports foreign keys. It was also easy to query our model. To get our project online we needed some easy modifications to our project and configuration files.

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• Designer issue in VS: Events cannot be set on the object passed to the event binding service ...

  - by serhio

  I have a little problem: the Winform control (that contains between others WPF) suddenly stopped to be displayed in Designer. Message: Events cannot be set on the object passed to the event binding service because a site associated with the object could not be located. Call Stack: at System.ComponentModel.Design.EventBindingService.EventPropertyDescriptor.SetValue(Object component, Object value) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeAttachEventStatement(IDesignerSerializationManager manager, CodeAttachEventStatement statement) at System.ComponentModel.Design.Serialization.CodeDomSerializerBase.DeserializeStatement(IDesignerSerializationManager manager, CodeStatement statement) Where could be the problem? InitializeComponent code Private Sub InitializeComponent() Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(PlanDeLigne)) Dim Appearance1 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance2 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance3 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance4 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance5 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance6 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance7 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance8 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance9 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance10 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance11 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Dim Appearance12 As Infragistics.Win.Appearance = New Infragistics.Win.Appearance() Me.mnbMenu = New System.Windows.Forms.ToolStrip() Me.mncMode = New System.Windows.Forms.ToolStripComboBox() Me.mnbSeparator1 = New System.Windows.Forms.ToolStripSeparator() Me.mnbAdd = New System.Windows.Forms.ToolStripButton() Me.mnbDelete = New System.Windows.Forms.ToolStripButton() Me.mnbSeparator2 = New System.Windows.Forms.ToolStripSeparator() Me.mnbDropDownAction = New System.Windows.Forms.ToolStripDropDownButton() Me.mnbDropDownActionSens = New System.Windows.Forms.ToolStripMenuItem() Me.mnbDropDownActionSeparator1 = New System.Windows.Forms.ToolStripSeparator() Me.mnbDropDownActionDistances = New System.Windows.Forms.ToolStripMenuItem() Me.mnbDropDownActionSeparator2 = New System.Windows.Forms.ToolStripSeparator() Me.mnbDropDownActionArretsPhysiques = New System.Windows.Forms.ToolStripMenuItem() Me.mnbSeparator3 = New System.Windows.Forms.ToolStripSeparator() Me.mnbSelectionZoom = New System.Windows.Forms.ToolStripButton() Me.mnbCancelZoom = New System.Windows.Forms.ToolStripButton() Me.mnbSeparator4 = New System.Windows.Forms.ToolStripSeparator() Me.mnbParametrage = New System.Windows.Forms.ToolStripButton() Me.mncSPlacerArret = New System.Windows.Forms.ToolStripMenuItem() Me.mncSSeparator1 = New System.Windows.Forms.ToolStripSeparator() Me.mncSImage = New System.Windows.Forms.ToolStripMenuItem() Me.mncSDefinirLastArret = New System.Windows.Forms.ToolStripMenuItem() Me.mncSSeparator2 = New System.Windows.Forms.ToolStripSeparator() Me.mncSSupprimerArrets = New System.Windows.Forms.ToolStripMenuItem() Me.mncSInsererArret = New System.Windows.Forms.ToolStripMenuItem() Me.mncSSeparator3 = New System.Windows.Forms.ToolStripSeparator() Me.mncSInformations = New System.Windows.Forms.ToolStripMenuItem() Me.mncSSupprimerSegment = New System.Windows.Forms.ToolStripMenuItem() Me.mncSSeparator4 = New System.Windows.Forms.ToolStripSeparator() Me.mncSBatirTroncon = New System.Windows.Forms.ToolStripMenuItem() Me.mncTInformations = New System.Windows.Forms.ToolStripMenuItem() Me.mncTDistances = New System.Windows.Forms.ToolStripMenuItem() Me.mncTSeparator1 = New System.Windows.Forms.ToolStripSeparator() Me.mncTTempsDeParcours = New System.Windows.Forms.ToolStripMenuItem() Me.mncTSeparator2 = New System.Windows.Forms.ToolStripSeparator() Me.mncTCreerSensInverse = New System.Windows.Forms.ToolStripMenuItem() Me.mncTSeparator3 = New System.Windows.Forms.ToolStripSeparator() Me.mncTSupprimerTroncon = New System.Windows.Forms.ToolStripMenuItem() Me.mncTBatirItineraire = New System.Windows.Forms.ToolStripMenuItem() Me.mncIInformations = New System.Windows.Forms.ToolStripMenuItem() Me.mncISeparator1 = New System.Windows.Forms.ToolStripSeparator() Me.mncISupprimerItineraire = New System.Windows.Forms.ToolStripMenuItem() Me.SplitContainer = New System.Windows.Forms.SplitContainer() Me.ElementHost1 = New System.Windows.Forms.Integration.ElementHost() Me._StopsCanvas = New Keolis.ctlWpfPlanDeLigne.StopsCanvas() Me.lblTitreCreation = New Keolis.ctlComponents.Label() Me.Panel1 = New System.Windows.Forms.Panel() Me.btnOk = New Keolis.ctlComponents.Button() Me.btnAnnuler = New Keolis.ctlComponents.Button() Me.grdCreation = New Keolis.ctlWinGrid.WinGrid() Me.mnbMenu.SuspendLayout() CType(Me.SplitContainer, System.ComponentModel.ISupportInitialize).BeginInit() Me.SplitContainer.Panel1.SuspendLayout() Me.SplitContainer.Panel2.SuspendLayout() Me.SplitContainer.SuspendLayout() Me.Panel1.SuspendLayout() CType(Me.grdCreation, System.ComponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() ' 'mnbMenu ' Me.mnbMenu.GripStyle = System.Windows.Forms.ToolStripGripStyle.Hidden Me.mnbMenu.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mncMode, Me.mnbSeparator1, Me.mnbAdd, Me.mnbDelete, Me.mnbSeparator2, Me.mnbDropDownAction, Me.mnbSeparator3, Me.mnbSelectionZoom, Me.mnbCancelZoom, Me.mnbSeparator4, Me.mnbParametrage}) Me.mnbMenu.Location = New System.Drawing.Point(0, 0) Me.mnbMenu.Name = "mnbMenu" Me.mnbMenu.Size = New System.Drawing.Size(605, 25) Me.mnbMenu.TabIndex = 2 ' 'mncMode ' Me.mncMode.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList Me.mncMode.Name = "mncMode" Me.mncMode.Size = New System.Drawing.Size(121, 25) Me.mncMode.ToolTipText = "Mode du plan de ligne" ' 'mnbSeparator1 ' Me.mnbSeparator1.AutoSize = False Me.mnbSeparator1.Name = "mnbSeparator1" Me.mnbSeparator1.Size = New System.Drawing.Size(20, 25) ' 'mnbAdd ' Me.mnbAdd.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image Me.mnbAdd.Image = CType(resources.GetObject("mnbAdd.Image"), System.Drawing.Image) Me.mnbAdd.ImageTransparentColor = System.Drawing.Color.Magenta Me.mnbAdd.Name = "mnbAdd" Me.mnbAdd.Size = New System.Drawing.Size(23, 22) Me.mnbAdd.Text = "Création Tronçon / Itinéraire" ' 'mnbDelete ' Me.mnbDelete.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image Me.mnbDelete.Image = CType(resources.GetObject("mnbDelete.Image"), System.Drawing.Image) Me.mnbDelete.ImageTransparentColor = System.Drawing.Color.Magenta Me.mnbDelete.Name = "mnbDelete" Me.mnbDelete.Size = New System.Drawing.Size(23, 22) Me.mnbDelete.Text = "Supprimer les éléments sélectionnés" ' 'mnbSeparator2 ' Me.mnbSeparator2.AutoSize = False Me.mnbSeparator2.Name = "mnbSeparator2" Me.mnbSeparator2.Size = New System.Drawing.Size(20, 25) ' 'mnbDropDownAction ' Me.mnbDropDownAction.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image Me.mnbDropDownAction.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnbDropDownActionSens, Me.mnbDropDownActionSeparator1, Me.mnbDropDownActionDistances, Me.mnbDropDownActionSeparator2, Me.mnbDropDownActionArretsPhysiques}) Me.mnbDropDownAction.Image = CType(resources.GetObject("mnbDropDownAction.Image"), System.Drawing.Image) Me.mnbDropDownAction.ImageTransparentColor = System.Drawing.Color.Magenta Me.mnbDropDownAction.Name = "mnbDropDownAction" Me.mnbDropDownAction.Size = New System.Drawing.Size(29, 22) Me.mnbDropDownAction.Text = "Action sur le plan de ligne" ' 'mnbDropDownActionSens ' Me.mnbDropDownActionSens.Checked = True Me.mnbDropDownActionSens.CheckOnClick = True Me.mnbDropDownActionSens.CheckState = System.Windows.Forms.CheckState.Checked Me.mnbDropDownActionSens.Name = "mnbDropDownActionSens" Me.mnbDropDownActionSens.Size = New System.Drawing.Size(222, 22) Me.mnbDropDownActionSens.Text = "Afficher le sens" ' 'mnbDropDownActionSeparator1 ' Me.mnbDropDownActionSeparator1.Name = "mnbDropDownActionSeparator1" Me.mnbDropDownActionSeparator1.Size = New System.Drawing.Size(219, 6) ' 'mnbDropDownActionDistances ' Me.mnbDropDownActionDistances.Checked = True Me.mnbDropDownActionDistances.CheckOnClick = True Me.mnbDropDownActionDistances.CheckState = System.Windows.Forms.CheckState.Checked Me.mnbDropDownActionDistances.Name = "mnbDropDownActionDistances" Me.mnbDropDownActionDistances.Size = New System.Drawing.Size(222, 22) Me.mnbDropDownActionDistances.Text = "Afficher les distances" ' 'mnbDropDownActionSeparator2 ' Me.mnbDropDownActionSeparator2.Name = "mnbDropDownActionSeparator2" Me.mnbDropDownActionSeparator2.Size = New System.Drawing.Size(219, 6) ' 'mnbDropDownActionArretsPhysiques ' Me.mnbDropDownActionArretsPhysiques.Checked = True Me.mnbDropDownActionArretsPhysiques.CheckOnClick = True Me.mnbDropDownActionArretsPhysiques.CheckState = System.Windows.Forms.CheckState.Checked Me.mnbDropDownActionArretsPhysiques.Name = "mnbDropDownActionArretsPhysiques" Me.mnbDropDownActionArretsPhysiques.Size = New System.Drawing.Size(222, 22) Me.mnbDropDownActionArretsPhysiques.Text = "Afficher les arrêts physiques" ' 'mnbSeparator3 ' Me.mnbSeparator3.AutoSize = False Me.mnbSeparator3.Name = "mnbSeparator3" Me.mnbSeparator3.Size = New System.Drawing.Size(20, 25) ' 'mnbSelectionZoom ' Me.mnbSelectionZoom.CheckOnClick = True Me.mnbSelectionZoom.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image Me.mnbSelectionZoom.Image = CType(resources.GetObject("mnbSelectionZoom.Image"), System.Drawing.Image) Me.mnbSelectionZoom.ImageTransparentColor = System.Drawing.Color.Magenta Me.mnbSelectionZoom.Name = "mnbSelectionZoom" Me.mnbSelectionZoom.Size = New System.Drawing.Size(23, 22) Me.mnbSelectionZoom.Text = "Zoom par sélection" ' 'mnbCancelZoom ' Me.mnbCancelZoom.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image Me.mnbCancelZoom.Image = CType(resources.GetObject("mnbCancelZoom.Image"), System.Drawing.Image) Me.mnbCancelZoom.ImageTransparentColor = System.Drawing.Color.Magenta Me.mnbCancelZoom.Name = "mnbCancelZoom" Me.mnbCancelZoom.Size = New System.Drawing.Size(23, 22) Me.mnbCancelZoom.Text = "Annuler le zoom" ' 'mnbSeparator4 ' Me.mnbSeparator4.AutoSize = False Me.mnbSeparator4.Name = "mnbSeparator4" Me.mnbSeparator4.Size = New System.Drawing.Size(20, 25) ' 'mnbParametrage ' Me.mnbParametrage.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image Me.mnbParametrage.Image = CType(resources.GetObject("mnbParametrage.Image"), System.Drawing.Image) Me.mnbParametrage.ImageTransparentColor = System.Drawing.Color.Magenta Me.mnbParametrage.Name = "mnbParametrage" Me.mnbParametrage.Size = New System.Drawing.Size(23, 22) Me.mnbParametrage.Text = "Paramétrage" ' 'mncSPlacerArret ' Me.mncSPlacerArret.Name = "mncSPlacerArret" Me.mncSPlacerArret.Size = New System.Drawing.Size(216, 22) Me.mncSPlacerArret.Text = "Placer un arrêt" ' 'mncSSeparator1 ' Me.mncSSeparator1.Name = "mncSSeparator1" Me.mncSSeparator1.Size = New System.Drawing.Size(213, 6) ' 'mncSImage ' Me.mncSImage.Name = "mncSImage" Me.mncSImage.Size = New System.Drawing.Size(216, 22) Me.mncSImage.Text = "Image..." ' 'mncSDefinirLastArret ' Me.mncSDefinirLastArret.Name = "mncSDefinirLastArret" Me.mncSDefinirLastArret.Size = New System.Drawing.Size(216, 22) Me.mncSDefinirLastArret.Text = "Définir comme dernier arrêt" ' 'mncSSeparator2 ' Me.mncSSeparator2.Name = "mncSSeparator2" Me.mncSSeparator2.Size = New System.Drawing.Size(213, 6) ' 'mncSSupprimerArrets ' Me.mncSSupprimerArrets.Name = "mncSSupprimerArrets" Me.mncSSupprimerArrets.Size = New System.Drawing.Size(216, 22) Me.mncSSupprimerArrets.Text = "Supprimer le ou les arrêts" ' 'mncSInsererArret ' Me.mncSInsererArret.Name = "mncSInsererArret" Me.mncSInsererArret.Size = New System.Drawing.Size(216, 22) Me.mncSInsererArret.Text = "Insérer un arrêt" ' 'mncSSeparator3 ' Me.mncSSeparator3.Name = "mncSSeparator3" Me.mncSSeparator3.Size = New System.Drawing.Size(213, 6) ' 'mncSInformations ' Me.mncSInformations.Name = "mncSInformations" Me.mncSInformations.Size = New System.Drawing.Size(216, 22) Me.mncSInformations.Text = "Modifier les informations" ' 'mncSSupprimerSegment ' Me.mncSSupprimerSegment.Name = "mncSSupprimerSegment" Me.mncSSupprimerSegment.Size = New System.Drawing.Size(216, 22) Me.mncSSupprimerSegment.Text = "Supprimer le segment" ' 'mncSSeparator4 ' Me.mncSSeparator4.Name = "mncSSeparator4" Me.mncSSeparator4.Size = New System.Drawing.Size(213, 6) ' 'mncSBatirTroncon ' Me.mncSBatirTroncon.Name = "mncSBatirTroncon" Me.mncSBatirTroncon.Size = New System.Drawing.Size(216, 22) Me.mncSBatirTroncon.Text = "Bâtir un tronçon" ' 'mncTInformations ' Me.mncTInformations.Name = "mncTInformations" Me.mncTInformations.Size = New System.Drawing.Size(201, 22) Me.mncTInformations.Text = "Modifier les informations" ' 'mncTDistances ' Me.mncTDistances.Name = "mncTDistances" Me.mncTDistances.Size = New System.Drawing.Size(201, 22) Me.mncTDistances.Text = "Modifier les distances" ' 'mncTSeparator1 ' Me.mncTSeparator1.Name = "mncTSeparator1" Me.mncTSeparator1.Size = New System.Drawing.Size(198, 6) ' 'mncTTempsDeParcours ' Me.mncTTempsDeParcours.Name = "mncTTempsDeParcours" Me.mncTTempsDeParcours.Size = New System.Drawing.Size(201, 22) Me.mncTTempsDeParcours.Text = "Temps de parcours" ' 'mncTSeparator2 ' Me.mncTSeparator2.Name = "mncTSeparator2" Me.mncTSeparator2.Size = New System.Drawing.Size(198, 6) ' 'mncTCreerSensInverse ' Me.mncTCreerSensInverse.Name = "mncTCreerSensInverse" Me.mncTCreerSensInverse.Size = New System.Drawing.Size(201, 22) Me.mncTCreerSensInverse.Text = "Créer le sens inverse" ' 'mncTSeparator3 ' Me.mncTSeparator3.Name = "mncTSeparator3" Me.mncTSeparator3.Size = New System.Drawing.Size(198, 6) ' 'mncTSupprimerTroncon ' Me.mncTSupprimerTroncon.Name = "mncTSupprimerTroncon" Me.mncTSupprimerTroncon.Size = New System.Drawing.Size(201, 22) Me.mncTSupprimerTroncon.Text = "Supprimer le tronçon" ' 'mncTBatirItineraire ' Me.mncTBatirItineraire.Name = "mncTBatirItineraire" Me.mncTBatirItineraire.Size = New System.Drawing.Size(201, 22) Me.mncTBatirItineraire.Text = "Bâtir un itinéraire" ' 'mncIInformations ' Me.mncIInformations.Name = "mncIInformations" Me.mncIInformations.Size = New System.Drawing.Size(201, 22) Me.mncIInformations.Text = "Modifier les informations" ' 'mncISeparator1 ' Me.mncISeparator1.Name = "mncISeparator1" Me.mncISeparator1.Size = New System.Drawing.Size(198, 6) ' 'mncISupprimerItineraire ' Me.mncISupprimerItineraire.Name = "mncISupprimerItineraire" Me.mncISupprimerItineraire.Size = New System.Drawing.Size(201, 22) Me.mncISupprimerItineraire.Text = "Supprimer l'itinéraires" ' 'SplitContainer ' Me.SplitContainer.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D Me.SplitContainer.Dock = System.Windows.Forms.DockStyle.Fill Me.SplitContainer.FixedPanel = System.Windows.Forms.FixedPanel.Panel2 Me.SplitContainer.Location = New System.Drawing.Point(0, 25) Me.SplitContainer.Name = "SplitContainer" ' 'SplitContainer.Panel1 ' Me.SplitContainer.Panel1.AutoScroll = True Me.SplitContainer.Panel1.Controls.Add(Me.ElementHost1) ' 'SplitContainer.Panel2 ' Me.SplitContainer.Panel2.Controls.Add(Me.lblTitreCreation) Me.SplitContainer.Panel2.Controls.Add(Me.Panel1) Me.SplitContainer.Panel2.Controls.Add(Me.grdCreation) Me.SplitContainer.Panel2MinSize = 0 Me.SplitContainer.Size = New System.Drawing.Size(605, 418) Me.SplitContainer.SplitterDistance = 428 Me.SplitContainer.SplitterWidth = 2 Me.SplitContainer.TabIndex = 1 ' 'ElementHost1 ' Me.ElementHost1.Dock = System.Windows.Forms.DockStyle.Fill Me.ElementHost1.Location = New System.Drawing.Point(0, 0) Me.ElementHost1.Name = "ElementHost1" Me.ElementHost1.Size = New System.Drawing.Size(424, 414) Me.ElementHost1.TabIndex = 0 Me.ElementHost1.Text = "ElementHost1" Me.ElementHost1.Child = Me._StopsCanvas ' 'lblTitreCreation ' Me.lblTitreCreation.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _ Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles) Me.lblTitreCreation.Location = New System.Drawing.Point(3, 4) Me.lblTitreCreation.Name = "lblTitreCreation" Me.lblTitreCreation.Size = New System.Drawing.Size(167, 16) Me.lblTitreCreation.TabIndex = 4 ' 'Panel1 ' Me.Panel1.AutoSize = True Me.Panel1.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink Me.Panel1.Controls.Add(Me.btnOk) Me.Panel1.Controls.Add(Me.btnAnnuler) Me.Panel1.Dock = System.Windows.Forms.DockStyle.Bottom Me.Panel1.Location = New System.Drawing.Point(0, 385) Me.Panel1.Name = "Panel1" Me.Panel1.Size = New System.Drawing.Size(171, 29) Me.Panel1.TabIndex = 3 ' 'btnOk ' Me.btnOk.Anchor = CType((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles) Me.btnOk.BackColor = System.Drawing.SystemColors.Control Me.btnOk.FlatAppearance.MouseDownBackColor = System.Drawing.Color.LightSlateGray Me.btnOk.FlatAppearance.MouseOverBackColor = System.Drawing.Color.LightSteelBlue Me.btnOk.FlatStyle = System.Windows.Forms.FlatStyle.Flat Me.btnOk.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.btnOk.ForeColor = System.Drawing.SystemColors.ControlText Me.btnOk.Location = New System.Drawing.Point(12, 3) Me.btnOk.Name = "btnOk" Me.btnOk.Size = New System.Drawing.Size(75, 23) Me.btnOk.TabIndex = 6 Me.btnOk.Text = "OK" Me.btnOk.UseVisualStyleBackColor = True ' 'btnAnnuler ' Me.btnAnnuler.Anchor = CType((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles) Me.btnAnnuler.BackColor = System.Drawing.SystemColors.Control Me.btnAnnuler.DialogResult = System.Windows.Forms.DialogResult.Cancel Me.btnAnnuler.FlatAppearance.MouseDownBackColor = System.Drawing.Color.LightSlateGray Me.btnAnnuler.FlatAppearance.MouseOverBackColor = System.Drawing.Color.LightSteelBlue Me.btnAnnuler.FlatStyle = System.Windows.Forms.FlatStyle.Flat Me.btnAnnuler.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.btnAnnuler.ForeColor = System.Drawing.SystemColors.ControlText Me.btnAnnuler.Location = New System.Drawing.Point(93, 3) Me.btnAnnuler.Name = "btnAnnuler" Me.btnAnnuler.Size = New System.Drawing.Size(75, 23) Me.btnAnnuler.TabIndex = 7 Me.btnAnnuler.Text = "Annuler" Me.btnAnnuler.UseVisualStyleBackColor = True ' 'grdCreation ' Me.grdCreation.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _ Or System.Windows.Forms.AnchorStyles.Left) _ Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles) Me.grdCreation.AutoResizeColumns = False Me.grdCreation.ColumnsFiltreActif = False Appearance1.BackColor = System.Drawing.SystemColors.Window Appearance1.BorderColor = System.Drawing.SystemColors.InactiveCaption Me.grdCreation.DisplayLayout.Appearance = Appearance1 Me.grdCreation.DisplayLayout.BorderStyle = Infragistics.Win.UIElementBorderStyle.Solid Me.grdCreation.DisplayLayout.CaptionVisible = Infragistics.Win.DefaultableBoolean.[False] Appearance2.BackColor = System.Drawing.SystemColors.ActiveBorder Appearance2.BackColor2 = System.Drawing.SystemColors.ControlDark Appearance2.BackGradientStyle = Infragistics.Win.GradientStyle.Vertical Appearance2.BorderColor = System.Drawing.SystemColors.Window Me.grdCreation.DisplayLayout.GroupByBox.Appearance = Appearance2 Appearance3.ForeColor = System.Drawing.SystemColors.GrayText Me.grdCreation.DisplayLayout.GroupByBox.BandLabelAppearance = Appearance3 Me.grdCreation.DisplayLayout.GroupByBox.BorderStyle = Infragistics.Win.UIElementBorderStyle.Solid Appearance4.BackColor = System.Drawing.SystemColors.ControlLightLight Appearance4.BackColor2 = System.Drawing.SystemColors.Control Appearance4.BackGradientStyle = Infragistics.Win.GradientStyle.Horizontal Appearance4.ForeColor = System.Drawing.SystemColors.GrayText Me.grdCreation.DisplayLayout.GroupByBox.PromptAppearance = Appearance4 Me.grdCreation.DisplayLayout.MaxColScrollRegions = 1 Me.grdCreation.DisplayLayout.MaxRowScrollRegions = 1 Appearance5.BackColor = System.Drawing.SystemColors.Window Appearance5.ForeColor = System.Drawing.SystemColors.ControlText Me.grdCreation.DisplayLayout.Override.ActiveCellAppearance = Appearance5 Appearance6.BackColor = System.Drawing.SystemColors.Highlight Appearance6.ForeColor = System.Drawing.SystemColors.HighlightText Me.grdCreation.DisplayLayout.Override.ActiveRowAppearance = Appearance6 Me.grdCreation.DisplayLayout.Override.AllowRowFiltering = Infragistics.Win.DefaultableBoolean.[False] Me.grdCreation.DisplayLayout.Override.BorderStyleCell = Infragistics.Win.UIElementBorderStyle.Dotted Me.grdCreation.DisplayLayout.Override.BorderStyleRow = Infragistics.Win.UIElementBorderStyle.Dotted Appearance7.BackColor = System.Drawing.SystemColors.Window Me.grdCreation.DisplayLayout.Override.CardAreaAppearance = Appearance7 Appearance8.BorderColor = System.Drawing.Color.Silver Appearance8.TextTrimming = Infragistics.Win.TextTrimming.EllipsisCharacter Me.grdCreation.DisplayLayout.Override.CellAppearance = Appearance8 Me.grdCreation.DisplayLayout.Override.CellPadding = 0 Appearance9.BackColor = System.Drawing.SystemColors.Control Appearance9.BackColor2 = System.Drawing.SystemColors.ControlDark Appearance9.BackGradientAlignment = Infragistics.Win.GradientAlignment.Element Appearance9.BackGradientStyle = Infragistics.Win.GradientStyle.Horizontal Appearance9.BorderColor = System.Drawing.SystemColors.Window Me.grdCreation.DisplayLayout.Override.GroupByRowAppearance = Appearance9 Appearance10.TextHAlignAsString = "Left" Me.grdCreation.DisplayLayout.Override.HeaderAppearance = Appearance10 Me.grdCreation.DisplayLayout.Override.HeaderClickAction = Infragistics.Win.UltraWinGrid.HeaderClickAction.SortMulti Me.grdCreation.DisplayLayout.Override.HeaderStyle = Infragistics.Win.HeaderStyle.WindowsXPCommand Appearance11.BackColor = System.Drawing.SystemColors.Window Appearance11.BorderColor = System.Drawing.Color.Silver Me.grdCreation.DisplayLayout.Override.RowAppearance = Appearance11 Me.grdCreation.DisplayLayout.Override.RowSelectors = Infragistics.Win.DefaultableBoolean.[False] Appearance12.BackColor = System.Drawing.SystemColors.ControlLight Me.grdCreation.DisplayLayout.Override.TemplateAddRowAppearance = Appearance12 Me.grdCreation.DisplayLayout.ScrollBounds = Infragistics.Win.UltraWinGrid.ScrollBounds.ScrollToFill Me.grdCreation.DisplayLayout.ScrollStyle = Infragistics.Win.UltraWinGrid.ScrollStyle.Immediate Me.grdCreation.DisplayLayout.ViewStyleBand = Infragistics.Win.UltraWinGrid.ViewStyleBand.OutlookGroupBy Me.grdCreation.Font = New System.Drawing.Font("Times New Roman", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.grdCreation.Location = New System.Drawing.Point(0, 23) Me.grdCreation.Name = "grdCreation" Me.grdCreation.PrintColumnsKey = Nothing Me.grdCreation.PrintRowsIndex = Nothing Me.grdCreation.PrintTitle = Nothing Me.grdCreation.RowsActivation = Infragistics.Win.UltraWinGrid.Activation.AllowEdit Me.grdCreation.Size = New System.Drawing.Size(175, 391) Me.grdCreation.TabIndex = 5 Me.grdCreation.Tag = "" ' 'PlanDeLigne ' Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.Controls.Add(Me.SplitContainer) Me.Controls.Add(Me.mnbMenu) Me.MinimumSize = New System.Drawing.Size(605, 431) Me.Name = "PlanDeLigne" Me.Size = New System.Drawing.Size(605, 443) Me.mnbMenu.ResumeLayout(False) Me.mnbMenu.PerformLayout() Me.SplitContainer.Panel1.ResumeLayout(False) Me.SplitContainer.Panel2.ResumeLayout(False) Me.SplitContainer.Panel2.PerformLayout() CType(Me.SplitContainer, System.ComponentModel.ISupportInitialize).EndInit() Me.SplitContainer.ResumeLayout(False) Me.Panel1.ResumeLayout(False) CType(Me.grdCreation, System.ComponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) Me.PerformLayout() End Sub

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• HttpClient POST fails to submit the form

  - by Jayomat

  Hi, I'm writing an app to check for the bus timetable's. Therefor I need to post some data to a html page, submit it, and parse the resulting page with htmlparser. Though it may be asked a lot, can some one help me identify if 1) this page does support post/get (I think it does) 2) which fields I need to use? 3) How to make the actual request? this is my code so far: String url = "http://busspur02.aseag.de/bs.exe?Cmd=RV&Karten=true&DatumT=30&DatumM=4&DatumJ=2010&ZeitH=&ZeitM=&Suchen=%28S%29uchen&GT0=&HT0=&GT1=&HT1="; String charset = "CP1252"; System.out.println("startFrom: "+start_from); System.out.println("goTo: "+destination); //String tag.v List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("HTO", start_from)); params.add(new BasicNameValuePair("HT1", destination)); params.add(new BasicNameValuePair("GTO", "Aachen")); params.add(new BasicNameValuePair("GT1", "Aachen")); params.add(new BasicNameValuePair("DatumT", day)); params.add(new BasicNameValuePair("DatumM", month)); params.add(new BasicNameValuePair("DatumJ", year)); params.add(new BasicNameValuePair("ZeitH", hour)); params.add(new BasicNameValuePair("ZeitM", min)); UrlEncodedFormEntity query = new UrlEncodedFormEntity(params, charset); HttpPost post = new HttpPost(url); post.setEntity(query); InputStream response = new DefaultHttpClient().execute(post).getEntity().getContent(); // Now do your thing with the facebook response. String source = readText(response,"CP1252"); Log.d(TAG_AVV,response.toString()); System.out.println("STREAM "+source); One person also gave me a hint to use firebug to read what's going on at the page, but I don't really understand what to look for, or more precisely, how to use the provided information. I also find it confusing, for example, that when I enter the data by hand, the url says, for example, "....HTO=Kaiserplatz&...", but in Firebug, the same Kaiserplatz is connected to a different field, in this case: \<\td class="Start3" Kaiserplatz <\/td (I inserted \ to make it visible) The last line in my code prints the html page, but without having send a request.. it's printed as if there was no input at all... My app is almost done, I hope someone can help me out to finish it! thanks in advance EDIT: this is what the s.o.p returns: (At some point there actually is some input, but only the destination ???) 04-30 03:15:43.524: INFO/System.out(3303): STREAM <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 04-30 03:15:43.524: INFO/System.out(3303): <html> 04-30 03:15:43.524: INFO/System.out(3303): <head> 04-30 03:15:43.545: INFO/System.out(3303): <title>Busspur online</title> 04-30 03:15:43.554: INFO/System.out(3303): <base href="http://busspur02.aseag.de"> 04-30 03:15:43.554: INFO/System.out(3303): <meta name="description" content="Busspur im Internet"> 04-30 03:15:43.554: INFO/System.out(3303): <meta name="author" content="Dr. Manfred Enning"> 04-30 03:15:43.554: INFO/System.out(3303): <meta name="AUTH_TYPE" content="Basic"> 04-30 03:15:43.574: INFO/System.out(3303): <meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252"> 04-30 03:15:43.574: INFO/System.out(3303): <meta HTTP-EQUIV="Content-Language" CONTENT="de"> 04-30 03:15:43.574: INFO/System.out(3303): <link rel=stylesheet type="text/css" href="busspur.css"> 04-30 03:15:43.574: INFO/System.out(3303): </head> 04-30 03:15:43.574: INFO/System.out(3303): 04-30 03:15:43.574: INFO/System.out(3303): <body> 04-30 03:15:43.574: INFO/System.out(3303): <table border="0" cellspacing="0" cellpadding="0" width="100%"> 04-30 03:15:43.574: INFO/System.out(3303): <tr> 04-30 03:15:43.584: INFO/System.out(3303): <td align="left" width="25%"><small>Version: 6.8.1.9s2<br>Datenstand: 13.04.2010 04-30 03:15:43.584: INFO/System.out(3303): 04-30 03:15:43.584: INFO/System.out(3303): <br>12.04.2010 - 12.06.2010 04-30 03:15:43.584: INFO/System.out(3303): <br>1663 04-30 03:15:43.584: INFO/System.out(3303): 3D3B9</small> 04-30 03:15:43.584: INFO/System.out(3303): </td> 04-30 03:15:43.584: INFO/System.out(3303): 04-30 03:15:43.584: INFO/System.out(3303): <td align="center" width="50%"> 04-30 03:15:43.584: INFO/System.out(3303): <a href="/bs.exe/SL?Sprache=Nederlands&amp;SID=3D3B9"><img src="http://www.busspur.de/logos/nederlands.gif" alt="Nederlands" border="0" Width="32" Height="22"></a><a href="/bs.exe/SL?Sprache=English&amp;SID=3D3B9"><img src="http://www.busspur.de/logos/english.gif" alt="English" border="0" Width="32" Height="22"></a><a href="/bs.exe/SL?Sprache=Francais&amp;SID=3D3B9"><img src="http://www.busspur.de/logos/francais.gif" alt="Francais" border="0" Width="32" Height="22"></a> 04-30 03:15:43.584: INFO/System.out(3303): </td> 04-30 03:15:43.584: INFO/System.out(3303): 04-30 03:15:43.594: INFO/System.out(3303): <td align="right" width="25%"> 04-30 03:15:43.594: INFO/System.out(3303): <a href="http://www.avv.de/"><img src="/logos/avvlogo.gif" border="0" alt="AVV"></a> 04-30 03:15:43.594: INFO/System.out(3303): </td> 04-30 03:15:43.594: INFO/System.out(3303): </tr> 04-30 03:15:43.594: INFO/System.out(3303): </table> 04-30 03:15:43.594: INFO/System.out(3303): 04-30 03:15:43.594: INFO/System.out(3303): <!-- Kopfbereich (automatisch erzeugt) --> 04-30 03:15:43.594: INFO/System.out(3303): <div align="center"> 04-30 03:15:43.594: INFO/System.out(3303): 04-30 03:15:43.604: INFO/System.out(3303): <H2>Busspur-Online <i>Verbindungsabfrage</i></H2> 04-30 03:15:43.604: INFO/System.out(3303): </div> 04-30 03:15:43.604: INFO/System.out(3303): <!-- Ende Kopfbereich --> 04-30 03:15:43.604: INFO/System.out(3303): 04-30 03:15:43.604: INFO/System.out(3303): <!-- Ausgabebereich (automatisch erzeugt) --> 04-30 03:15:43.604: INFO/System.out(3303): <div align="center"> 04-30 03:15:43.614: INFO/System.out(3303): <p></p> 04-30 03:15:43.614: INFO/System.out(3303): <p></p> 04-30 03:15:43.614: INFO/System.out(3303): 04-30 03:15:43.614: INFO/System.out(3303): 04-30 03:15:43.624: INFO/System.out(3303): </div> 04-30 03:15:43.624: INFO/System.out(3303): <!-- Ende Ausgabebereich --> 04-30 03:15:43.634: INFO/System.out(3303): 04-30 03:15:43.634: INFO/System.out(3303): <!-- Fussnotenbereich (automatisch erzeugt) --> 04-30 03:15:43.634: INFO/System.out(3303): <div align="left"> 04-30 03:15:43.634: INFO/System.out(3303): 04-30 03:15:43.634: INFO/System.out(3303): 04-30 03:15:43.634: INFO/System.out(3303): </div> 04-30 03:15:43.634: INFO/System.out(3303): <!-- Ende Fussnotenbereich --> 04-30 03:15:43.634: INFO/System.out(3303): 04-30 03:15:43.634: INFO/System.out(3303): <!-- Nachschlageliste (automatisch erzeugt) --> 04-30 03:15:43.634: INFO/System.out(3303): <div align="center"> 04-30 03:15:43.644: INFO/System.out(3303): 04-30 03:15:43.644: INFO/System.out(3303): </div> 04-30 03:15:43.644: INFO/System.out(3303): <!-- Ende Nachschlageliste --> 04-30 03:15:43.644: INFO/System.out(3303): 04-30 03:15:43.644: INFO/System.out(3303): 04-30 03:15:43.644: INFO/System.out(3303): <!-- Eingabeformular --> 04-30 03:15:43.644: INFO/System.out(3303): 04-30 03:15:43.644: INFO/System.out(3303): 04-30 03:15:43.644: INFO/System.out(3303): <!-- Eingabeformular --> 04-30 03:15:43.644: INFO/System.out(3303): <form name="Maske" action="/bs.exe" method="get"> 04-30 03:15:43.644: INFO/System.out(3303): 04-30 03:15:43.644: INFO/System.out(3303): <input type="hidden" name="SID" value="3D3B9"> 04-30 03:15:43.644: INFO/System.out(3303): <input type="hidden" name="ScreenX" value=""> 04-30 03:15:43.654: INFO/System.out(3303): <input type="hidden" name="ScreenY" value=""> 04-30 03:15:43.654: INFO/System.out(3303): <input type="hidden" class="hiddenForm" name="CMD" value="CR" /> 04-30 03:15:43.654: INFO/System.out(3303): 04-30 03:15:43.654: INFO/System.out(3303): 04-30 03:15:43.654: INFO/System.out(3303): <input TYPE="Submit" name="Suchen" value="S" tabindex="20" style="visibility:hidden"> 04-30 03:15:43.654: INFO/System.out(3303): 04-30 03:15:43.654: INFO/System.out(3303): <table align="center" border="0" cellspacing="0" cellpadding="2"> 04-30 03:15:43.654: INFO/System.out(3303): <tr> 04-30 03:15:43.654: INFO/System.out(3303): <td class="Haupt"> 04-30 03:15:43.654: INFO/System.out(3303): 04-30 03:15:43.674: INFO/System.out(3303): <table border="0" cellspacing="0" cellpadding="2"> 04-30 03:15:43.674: INFO/System.out(3303): <!-- 1.Zeile Startauswahl --> 04-30 03:15:43.674: INFO/System.out(3303): <tr> 04-30 03:15:43.674: INFO/System.out(3303): <td rowspan="2" class="Start1"> 04-30 03:15:43.674: INFO/System.out(3303): Start 04-30 03:15:43.685: INFO/System.out(3303): </td> 04-30 03:15:43.685: INFO/System.out(3303): 04-30 03:15:43.685: INFO/System.out(3303): <td class="Start2" height="25"> 04-30 03:15:43.685: INFO/System.out(3303): Stadt/Gemeinde 04-30 03:15:43.685: INFO/System.out(3303): </td> 04-30 03:15:43.685: INFO/System.out(3303): 04-30 03:15:43.685: INFO/System.out(3303): <td class="Start3"> 04-30 03:15:43.685: INFO/System.out(3303): <input type="text" name="GT0" value="" tabindex="1" /> 04-30 03:15:43.704: INFO/System.out(3303): 04-30 03:15:43.704: INFO/System.out(3303): </td> 04-30 03:15:43.704: INFO/System.out(3303): 04-30 03:15:43.704: INFO/System.out(3303): 04-30 03:15:43.704: INFO/System.out(3303): <td rowspan="2" class="Start4"> 04-30 03:15:43.714: INFO/System.out(3303): <input type="submit" name="Map0" value="Karte" tabindex="100" /> 04-30 03:15:43.724: INFO/System.out(3303): 04-30 03:15:43.724: INFO/System.out(3303): </td> 04-30 03:15:43.724: INFO/System.out(3303): 04-30 03:15:43.724: INFO/System.out(3303): 04-30 03:15:43.724: INFO/System.out(3303): </tr> 04-30 03:15:43.724: INFO/System.out(3303): 04-30 03:15:43.724: INFO/System.out(3303): <tr> 04-30 03:15:43.734: INFO/System.out(3303): <td class="Start2" height="25"> 04-30 03:15:43.734: INFO/System.out(3303): <select name="T0" id="efaT0"> 04-30 03:15:43.734: INFO/System.out(3303): <option value="A" >Adresse 04-30 03:15:43.734: INFO/System.out(3303): <option value="H" selected="selected">Haltestelle 04-30 03:15:43.734: INFO/System.out(3303): <option value="Z" >Bes. Ziel 04-30 03:15:43.734: INFO/System.out(3303): </select> 04-30 03:15:43.734: INFO/System.out(3303): 04-30 03:15:43.734: INFO/System.out(3303): </td> 04-30 03:15:43.734: INFO/System.out(3303): 04-30 03:15:43.734: INFO/System.out(3303): <td class="Start3"> 04-30 03:15:43.734: INFO/System.out(3303): <input type="text" name="HT0" value="" tabindex="2" /> 04-30 03:15:43.734: INFO/System.out(3303): 04-30 03:15:43.745: INFO/System.out(3303): </td> 04-30 03:15:43.754: INFO/System.out(3303): 04-30 03:15:43.774: INFO/System.out(3303): </tr> 04-30 03:15:43.784: INFO/System.out(3303): 04-30 03:15:43.784: INFO/System.out(3303): <!-- 2.Zeile Ziel oder ViaAuswahl --> 04-30 03:15:43.784: INFO/System.out(3303): 04-30 03:15:43.805: INFO/System.out(3303): <tr> 04-30 03:15:43.834: INFO/System.out(3303): <td rowspan="2" class="Ziel1"> 04-30 03:15:43.834: INFO/System.out(3303): Ziel 04-30 03:15:43.834: INFO/System.out(3303): </td> 04-30 03:15:43.844: INFO/System.out(3303): 04-30 03:15:43.844: INFO/System.out(3303): <td class="Ziel2" height="25"> 04-30 03:15:43.844: INFO/System.out(3303): Stadt/Gemeinde 04-30 03:15:43.844: INFO/System.out(3303): </td> 04-30 03:15:43.854: INFO/System.out(3303): 04-30 03:15:43.854: INFO/System.out(3303): <td class="Ziel3"> 04-30 03:15:43.854: INFO/System.out(3303): Aachen 04-30 03:15:43.864: INFO/System.out(3303): </td> 04-30 03:15:43.874: INFO/System.out(3303): 04-30 03:15:43.874: INFO/System.out(3303): 04-30 03:15:43.884: INFO/System.out(3303): <td rowspan="2" class="Ziel4"> 04-30 03:15:43.884: INFO/System.out(3303): <input type="submit" name="Map1" value="Karte" tabindex="101" /> 04-30 03:15:43.884: INFO/System.out(3303): 04-30 03:15:43.884: INFO/System.out(3303): </td> 04-30 03:15:43.884: INFO/System.out(3303): 04-30 03:15:43.884: INFO/System.out(3303): 04-30 03:15:43.884: INFO/System.out(3303): </tr> 04-30 03:15:43.884: INFO/System.out(3303): 04-30 03:15:43.884: INFO/System.out(3303): <tr> 04-30 03:15:43.884: INFO/System.out(3303): <td class="Ziel2" height="25"> 04-30 03:15:43.894: INFO/System.out(3303): <small></small> 04-30 03:15:43.894: INFO/System.out(3303): </td> 04-30 03:15:43.894: INFO/System.out(3303): <td class="Ziel3"> 04-30 03:15:43.894: INFO/System.out(3303): Karlsgraben 04-30 03:15:43.904: INFO/System.out(3303): </td> 04-30 03:15:43.904: INFO/System.out(3303): </tr> 04-30 03:15:43.904: INFO/System.out(3303): 04-30 03:15:43.914: INFO/System.out(3303): 04-30 03:15:43.924: INFO/System.out(3303): 04-30 03:15:43.934: INFO/System.out(3303): 04-30 03:15:43.934: INFO/System.out(3303): 04-30 03:15:43.934: INFO/System.out(3303): 04-30 03:15:43.934: INFO/System.out(3303): <!-- 3.Zeile Datum/Zeit/Intervall --> 04-30 03:15:43.934: INFO/System.out(3303): <tr> 04-30 03:15:43.944: INFO/System.out(3303): <td rowspan="3" class="Zeit1"> 04-30 03:15:43.944: INFO/System.out(3303): Zeit 04-30 03:15:43.944: INFO/System.out(3303): </td> 04-30 03:15:43.944: INFO/System.out(3303): <td class="Datum2"> 04-30 03:15:43.944: INFO/System.out(3303): Datum 04-30 03:15:43.944: INFO/System.out(3303): </td> 04-30 03:15:43.944: INFO/System.out(3303): 04-30 03:15:43.944: INFO/System.out(3303): <!-- Für Abfragen ohne Karte alternativ Zeile ohne colspan hinzufügen --> 04-30 03:15:43.954: INFO/System.out(3303): 04-30 03:15:43.964: INFO/System.out(3303): <td class="Datum3" height="25" colspan="2"> 04-30 03:15:43.984: INFO/System.out(3303): <select name="DatumT" tabindex="10" id="efaDatumT"> 04-30 03:15:43.984: INFO/System.out(3303): <option >1</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >2</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >3</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >4</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >5</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >6</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >7</option> 04-30 03:15:43.984: INFO/System.out(3303): <option >8</option> 04-30 03:15:43.994: INFO/System.out(3303): <option >9</option> 04-30 03:15:43.994: INFO/System.out(3303): <option >10</option> 04-30 03:15:43.994: INFO/System.out(3303): <option >11</option> 04-30 03:15:43.994: INFO/System.out(3303): <option >12</option> 04-30 03:15:44.005: INFO/System.out(3303): <option >13</option> 04-30 03:15:44.024: INFO/System.out(3303): <option >14</option> 04-30 03:15:44.034: INFO/System.out(3303): <option >15</option> 04-30 03:15:44.034: INFO/System.out(3303): <option >16</option> 04-30 03:15:44.034: INFO/System.out(3303): <option >17</option> 04-30 03:15:44.034: INFO/System.out(3303): <option >18</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >19</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >20</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >21</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >22</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >23</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >24</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >25</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >26</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >27</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >28</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >29</option> 04-30 03:15:44.044: INFO/System.out(3303): <option selected="selected">30</option> 04-30 03:15:44.044: INFO/System.out(3303): <option >31</option> 04-30 03:15:44.055: INFO/System.out(3303): </select> 04-30 03:15:44.055: INFO/System.out(3303): . 04-30 03:15:44.055: INFO/System.out(3303): <select name="DatumM" tabindex="11" id="efaDatumM"> 04-30 03:15:44.055: INFO/System.out(3303): <option >1</option> 04-30 03:15:44.055: INFO/System.out(3303): <option >2</option> 04-30 03:15:44.055: INFO/System.out(3303): <option >3</option> 04-30 03:15:44.064: INFO/System.out(3303): <option selected="selected">4</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >5</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >6</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >7</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >8</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >9</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >10</option> 04-30 03:15:44.064: INFO/System.out(3303): <option >11</option> 04-30 03:15:44.085: INFO/System.out(3303): <option >12</option> 04-30 03:15:44.085: INFO/System.out(3303): </select> 04-30 03:15:44.085: INFO/System.out(3303): . 04-30 03:15:44.085: INFO/System.out(3303): <select name="DatumJ" tabindex="12" id="efaDatumJ"> 04-30 03:15:44.095: INFO/System.out(3303): <option >2009</option> 04-30 03:15:44.095: INFO/System.out(3303): <option selected="selected">2010</option> 04-30 03:15:44.095: INFO/System.out(3303): <option >2011</option> 04-30 03:15:44.095: INFO/System.out(3303): </select> 04-30 03:15:44.095: INFO/System.out(3303): 04-30 03:15:44.095: INFO/System.out(3303): </td> 04-30 03:15:44.095: INFO/System.out(3303): 04-30 03:15:44.105: INFO/System.out(3303): </tr> 04-30 03:15:44.115: INFO/System.out(3303): 04-30 03:15:44.115: INFO/System.out(3303): <tr> 04-30 03:15:44.115: INFO/System.out(3303): <td class="Uhrzeit2"> 04-30 03:15:44.115: INFO/System.out(3303): <input type="radio" name="AbfAnk" value="Abf" checked />Abfahrten ab<br /> 04-30 03:15:44.115: INFO/System.out(3303): <input type="radio" name="AbfAnk" value="Ank" />Ankünfte bis 04-30 03:15:44.115: INFO/System.out(3303): 04-30 03:15:44.115: INFO/System.out(3303): </td> 04-30 03:15:44.125: INFO/System.out(3303): <td class="Uhrzeit3" height="25"> 04-30 03:15:44.125: INFO/System.out(3303): <select name="ZeitH" tabindex="14" id="efaZeitH"> 04-30 03:15:44.125: INFO/System.out(3303): <option >0</option> 04-30 03:15:44.125: INFO/System.out(3303): <option >1</option> 04-30 03:15:44.125: INFO/System.out(3303): <option >2</option> 04-30 03:15:44.135: INFO/System.out(3303): <option >3</option> 04-30 03:15:44.135: INFO/System.out(3303): <option >4</option> 04-30 03:15:44.135: INFO/System.out(3303): <option >5</option> 04-30 03:15:44.135: INFO/System.out(3303): <option >6</option> 04-30 03:15:44.135: INFO/System.out(3303): <option >7</option> 04-30 03:15:44.135: INFO/System.out(3303): <option >8</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >9</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >10</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >11</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >12</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >13</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >14</option> 04-30 03:15:44.145: INFO/System.out(3303): <option selected="selected">15</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >16</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >17</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >18</option> 04-30 03:15:44.145: INFO/System.out(3303): <option >19</option> 04-30 03:15:44.155: INFO/System.out(3303): <option >20</option> 04-30 03:15:44.155: INFO/System.out(3303): <option >21</option> 04-30 03:15:44.155: INFO/System.out(3303): <option >22</option> 04-30 03:15:44.155: INFO/System.out(3303): <option >23</option> 04-30 03:15:44.155: INFO/System.out(3303): </select> 04-30 03:15:44.155: INFO/System.out(3303): : 04-30 03:15:44.155: INFO/System.out(3303): <select name="ZeitM" tabindex="15" id="efaZeitM"> 04-30 03:15:44.155: INFO/System.out(3303): <option >00</option> 04-30 03:15:44.155: INFO/System.out(3303): <option selected="selected">15</option> 04-30 03:15:44.155: INFO/System.out(3303): <option >30</option> 04-30 03:15:44.155: INFO/System.out(3303): <option >45</option> 04-30 03:15:44.155: INFO/System.out(3303): </select> 04-30 03:15:44.155: INFO/System.out(3303): 04-30 03:15:44.155: INFO/System.out(3303): </td> 04-30 03:15:44.155: INFO/System.out(3303): 04-30 03:15:44.165: INFO/System.out(3303): <td class="Uhrzeit2">&nbsp;</td> 04-30 03:15:44.165: INFO/System.out(3303): 04-30 03:15:44.165: INFO/System.out(3303): </tr> 04-30 03:15:44.165: INFO/System.out(3303): 04-30 03:15:44.165: INFO/System.out(3303): <tr> 04-30 03:15:44.165: INFO/System.out(3303): <td class="Intervall2"> 04-30 03:15:44.165: INFO/System.out(3303): Intervall 04-30 03:15:44.165: INFO/System.out(3303): </td> 04-30 03:15:44.184: INFO/System.out(3303): 04-30 03:15:44.184: INFO/System.out(3303): <td class="Intervall3" height="25"> 04-30 03:15:44.184: INFO/System.out(3303): <select name="Intervall" tabindex="13" id="efaIntervall"> 04-30 03:15:44.184: INFO/System.out(3303): <option value="60" >1 h</option> 04-30 03:15:44.184: INFO/System.out(3303): <option value="120" >2 h</option> 04-30 03:15:44.184: INFO/System.out(3303): <option value="240" >4 h</option> 04-30 03:15:44.184: INFO/System.out(3303): <option value="480" >8 h</option> 04-30 03:15:44.184: INFO/System.out(3303): <option value="1800" >ganzer Tag</option> 04-30 03:15:44.194: INFO/System.out(3303): </select> 04-30 03:15:44.194: INFO/System.out(3303): 04-30 03:15:44.204: INFO/System.out(3303): </td> 04-30 03:15:44.204: INFO/System.out(3303): 04-30 03:15:44.204: INFO/System.out(3303): <td class="Intervall3">&nbsp; 04-30 03:15:44.204: INFO/System.out(3303): 04-30 03:15:44.204: INFO/System.out(3303): </tr> 04-30 03:15:44.204: INFO/System.out(3303): </table> 04-30 03:15:44.204: INFO/System.out(3303): 04-30 03:15:44.204: INFO/System.out(3303): </td> 04-30 03:15:44.204: INFO/System.out(3303): 04-30 03:15:44.204: INFO/System.out(3303): <td class="Schalter" valign="top"> 04-30 03:15:44.204: INFO/System.out(3303): <table class="Schalter"> 04-30 03:15:44.204: INFO/System.out(3303): <!-- Buttons --> 04-30 03:15:44.204: INFO/System.out(3303): <tr> 04-30 03:15:44.204: INFO/System.out(3303): <td class="Schalter" align="center"> 04-30 03:15:44.226: INFO/System.out(3303): <input TYPE="Submit" accesskey="s" class="SuchenBtn" name="Suchen" tabindex="20" VALUE="(S)uchen"> 04-30 03:15:44.226: INFO/System.out(3303): </td> 04-30 03:15:44.226: INFO/System.out(3303): </tr> 04-30 03:15:44.226: INFO/System.out(3303): 04-30 03:15:44.226: INFO/System.out(3303): 04-30 03:15:44.226: INFO/System.out(3303): <tr> 04-30 03:15:44.226: INFO/System.out(3303): <td class="Schalter" align="center"> 04-30 03:15:44.226: INFO/System.out(3303): <input TYPE="Submit" accesskey="o" name="Optionen" tabindex="22" VALUE="(O)ptionen"> 04-30 03:15:44.226: INFO/System.out(3303): </td> 04-30 03:15:44.226: INFO/System.out(3303): </tr> 04-30 03:15:44.226: INFO/System.out(3303): 04-30 03:15:44.226: INFO/System.out(3303): 04-30 03:15:44.226: INFO/System.out(3303): <tr> 04-30 03:15:44.226: INFO/System.out(3303): <td class="Schalter" align="center"> 04-30 03:15:44.226: INFO/System.out(3303): <input TYPE="Button" accesskey="z" tabindex="24" VALUE="(Z)urück" onClick="history.back()"> 04-30 03:15:44.226: INFO/System.out(3303): </td> 04-30 03:15:44.226: INFO/System.out(3303): </tr> 04-30 03:15:44.226: INFO/System.out(3303): <tr> 04-30 03:15:44.226: INFO/System.out(3303): <td class="Schalter" align="center"> 04-30 03:15:44.226: INFO/System.out(3303): <input TYPE="Button" accesskey="h" tabindex="25" VALUE="(H)ilfe" onClick="self.location.href='/bs.exe/FF?N=hilfe&amp;SID=3D3B9'"> 04-30 03:15:44.226: INFO/System.out(3303): </td> 04-30 03:15:44.235: INFO/System.out(3303): </tr> 04-30 03:15:44.235: INFO/System.out(3303): <tr> 04-30 03:15:44.235: INFO/System.out(3303): <td class="Schalter" align="center"> 04-30 03:15:44.235: INFO/System.out(3303): <input TYPE="Submit" accesskey="n" tabindex="26" name="Loeschen" VALUE="(N)eue Suche"> 04-30 03:15:44.235: INFO/System.out(3303): </td> 04-30 03:15:44.235: INFO/System.out(3303): </tr> 04-30 03:15:44.235: INFO/System.out(3303): 04-30 03:15:44.235: INFO/System.out(3303): <tr> 04-30 03:15:44.235: INFO/System.out(3303): 04-30 03:15:44.244: INFO/System.out(3303): <td class="Schalter" align="center"> 04-30 03:15:44.244: INFO/System.out(3303): <input TYPE="Button" accesskey="a" tabindex="27" VALUE="H(a)ltestelle" onClick="self.location.href='/bs.exe/RHFF?Karten=true?N=Result&amp;SID=3D3B9'"> 04-30 03:15:44.244: INFO/System.out(3303): </td> 04-30 03:15:44.244: INFO/System.out(3303): 04-30 03:15:44.244: INFO/System.out(3303): </tr> 04-30 03:15:44.244: INFO/System.out(3303): </table> 04-30 03:15:44.254: INFO/System.out(3303): 04-30 03:15:44.254: INFO/System.out(3303): </td> 04-30 03:15:44.254: INFO/System.out(3303): </tr> 04-30 03:15:44.254: INFO/System.out(3303): </table> 04-30 03:15:44.254: INFO/System.out(3303): </form> 04-30 03:15:44.254: INFO/System.out(3303): 04-30 03:15:44.254: INFO/System.out(3303): 04-30 03:15:44.254: INFO/System.out(3303): <!-- Meldungsbereich (automatisch erzeugt) --> 04-30 03:15:44.254: INFO/System.out(3303): <div align="center" id="meldungen"> 04-30 03:15:44.265: INFO/System.out(3303): <table class="Bedienhinweise"><tr><td rowspan="2"><img SRC="http://www.busspur.de/logos/hinweis.png" ALIGN="top" alt="Symbol" WIDTH="32" HEIGHT="20">&nbsp;</td><td rowspan="2">Start</td><td>Geben Sie den Namen der Stadt/Gemeinde ein</td></tr><tr><td>Geben Sie den Namen der Haltestelle ein</td></tr></table> 04-30 03:15:44.265: INFO/System.out(3303): </div> 04-30 03:15:44.265:

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• Pre-filtering and shaping OData feeds using WCF Data Services and the Entity Framework - Part 1

  - by rajbk

  The Open Data Protocol, referred to as OData, is a new data-sharing standard that breaks down silos and fosters an interoperative ecosystem for data consumers (clients) and producers (services) that is far more powerful than currently possible. It enables more applications to make sense of a broader set of data, and helps every data service and client add value to the whole ecosystem. WCF Data Services (previously known as ADO.NET Data Services), then, was the first Microsoft technology to support the Open Data Protocol in Visual Studio 2008 SP1. It provides developers with client libraries for .NET, Silverlight, AJAX, PHP and Java. Microsoft now also supports OData in SQL Server 2008 R2, Windows Azure Storage, Excel 2010 (through PowerPivot), and SharePoint 2010. Many other other applications in the works. * This post walks you through how to create an OData feed, define a shape for the data and pre-filter the data using Visual Studio 2010, WCF Data Services and the Entity Framework. A sample project is attached at the bottom of Part 2 of this post. Pre-filtering and shaping OData feeds using WCF Data Services and the Entity Framework - Part 2 Create the Web Application File –› New –› Project, Select “ASP.NET Empty Web Application” Add the Entity Data Model Right click on the Web Application in the Solution Explorer and select “Add New Item..” Select “ADO.NET Entity Data Model” under "Data”. Name the Model “Northwind” and click “Add”.   In the “Choose Model Contents”, select “Generate Model From Database” and click “Next”   Define a connection to your database containing the Northwind database in the next screen. We are going to expose the Products table through our OData feed. Select “Products” in the “Choose your Database Object” screen.   Click “Finish”. We are done creating our Entity Data Model. Save the Northwind.edmx file created. Add the WCF Data Service Right click on the Web Application in the Solution Explorer and select “Add New Item..” Select “WCF Data Service” from the list and call the service “DataService” (creative, huh?). Click “Add”.   Enable Access to the Data Service Open the DataService.svc.cs class. The class is well commented and instructs us on the next steps. public class DataService : DataService< /* TODO: put your data source class name here */ > { // This method is called only once to initialize service-wide policies. public static void InitializeService(DataServiceConfiguration config) { // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc. // Examples: // config.SetEntitySetAccessRule("MyEntityset", EntitySetRights.AllRead); // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All); config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; } } Replace the comment that starts with “/* TODO:” with “NorthwindEntities” (the entity container name of the Model we created earlier).  WCF Data Services is initially locked down by default, FTW! No data is exposed without you explicitly setting it. You have explicitly specify which Entity sets you wish to expose and what rights are allowed by using the SetEntitySetAccessRule. The SetServiceOperationAccessRule on the other hand sets rules for a specified operation. Let us define an access rule to expose the Products Entity we created earlier. We use the EnititySetRights.AllRead since we want to give read only access. Our modified code is shown below. public class DataService : DataService<NorthwindEntities> { public static void InitializeService(DataServiceConfiguration config) { config.SetEntitySetAccessRule("Products", EntitySetRights.AllRead); config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; } } We are done setting up our ODataFeed! Compile your project. Right click on DataService.svc and select “View in Browser” to see the OData feed. To view the feed in IE, you must make sure that "Feed Reading View" is turned off. You set this under Tools -› Internet Options -› Content tab.   If you navigate to “Products”, you should see the Products feed. Note also that URIs are case sensitive. ie. Products work but products doesn’t.   Filtering our data OData has a set of system query operations you can use to perform common operations against data exposed by the model. For example, to see only Products in CategoryID 2, we can use the following request: /DataService.svc/Products?$filter=CategoryID eq 2 At the time of this writing, supported operations are $orderby, $top, $skip, $filter, $expand, $format†, $select, $inlinecount. Pre-filtering our data using Query Interceptors The Product feed currently returns all Products. We want to change that so that it contains only Products that have not been discontinued. WCF introduces the concept of interceptors which allows us to inject custom validation/policy logic into the request/response pipeline of a WCF data service. We will use a QueryInterceptor to pre-filter the data so that it returns only Products that are not discontinued. To create a QueryInterceptor, write a method that returns an Expression<Func<T, bool>> and mark it with the QueryInterceptor attribute as shown below. [QueryInterceptor("Products")] public Expression<Func<Product, bool>> OnReadProducts() { return o => o.Discontinued == false; } Viewing the feed after compilation will only show products that have not been discontinued. We also confirm this by looking at the WHERE clause in the SQL generated by the entity framework. SELECT [Extent1].[ProductID] AS [ProductID], ... ... [Extent1].[Discontinued] AS [Discontinued] FROM [dbo].[Products] AS [Extent1] WHERE 0 = [Extent1].[Discontinued] Other examples of Query/Change interceptors can be seen here including an example to filter data based on the identity of the authenticated user. We are done pre-filtering our data. In the next part of this post, we will see how to shape our data. Pre-filtering and shaping OData feeds using WCF Data Services and the Entity Framework - Part 2 Foot Notes * http://msdn.microsoft.com/en-us/data/aa937697.aspx † $format did not work for me. The way to get a Json response is to include the following in the  request header “Accept: application/json, text/javascript, */*” when making the request. This is easily done with most JavaScript libraries.

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• Role of systems in entity systems architecture

  - by bio595

  I've been reading a lot about entity components and systems and have thought that the idea of an entity just being an ID is quite interesting. However I don't know how this completely works with the components aspect or the systems aspect. A component is just a data object managed by some relevant system. A collision system uses some BoundsComponent together with a spatial data structure to determine if collisions have happened. All good so far, but what if multiple systems need access to the same component? Where should the data live? An input system could modify an entities BoundsComponent, but the physics system(s) need access to the same component as does some rendering system. Also, how are entities constructed? One of the advantages I've read so much about is flexibility in entity construction. Are systems intrinsically tied to a component? If I want to introduce some new component, do I also have to introduce a new system or modify an existing one? Another thing that I've read often is that the 'type' of an entity is inferred by what components it has. If my entity is just an id how can I know that my robot entity needs to be moved or rendered and thus modified by some system? Sorry for the long post (or at least it seems so from my phone screen)!

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• Actually utilizing relational databases for entity systems

  - by Marc Müller

  Recently I was researching several entity systems and obviously I came across T=Machine's fantastic articles on the subject. In Part 5 of the series the author uses a relational schema to explain how an entity system is built and works. Since reading this, I have been wondering whether or not actually using a compact SQL library would be fast enough for real-time usage in video games. Performance seems to be the main issue with a full blown SQL database for management of all entities and components. However, as mentioned in T=Machine's post, basically all access to data inside the SQLDB is done sequentlially by each system over each component. Additionally, using a library like SQLite, one could easily improve performance by storing the entity data exclusively in RAM to increase access speeds. Disregarding possible performance issues, using a SQL database, in my opinion, would allow for a very intuitive implementation of entity systems and bring a long certain other benefits like easy de/serialization of game states and consistency checks like the uniqueness of entity IDs. Edit for clarification: The main question was whether using a SQL database for the actual entity management (not just storing the game state on the disk) in a real-time game would still yield a framerate appropriate for a game or even if someone is aware of projects that demonstrate SQL in a video game.

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• Entity Framework 4.0: Optimal and horrible SQL

  - by DigiMortal

  Lately I had Entity Framework 4.0 session where I introduced new features of Entity Framework. During session I found out with audience how Entity Framework 4.0 can generate optimized SQL. After session I also showed guys one horrible example about how awful SQL can be generated by Entity Framework. In this posting I will cover both examples. Optimal SQL Before going to code take a look at following model. There is class called Event and I will use this class in my query. Here is the LINQ To Entities query that uses small anonymous type. var query = from e in _context.Events             select new { Id = e.Id, Title = e.Title }; Debug.WriteLine(((ObjectQuery)query).ToTraceString()); Running this code gives us the following SQL. SELECT      [Extent1].[event_id] AS [event_id],      [Extent1].[title] AS [title]  FROM [dbo].[events] AS [Extent1] This is really small – no additional fields in SELECT clause. Nice, isn’t it? Horrible SQL Ayende Rahien blog shows us darker side of Entiry Framework 4.0 queries. You can find comparison betwenn NHibernate, LINQ To SQL and LINQ To Entities from posting What happens behind the scenes: NHibernate, Linq to SQL, Entity Framework scenario analysis. In this posting I will show you the resulting query and let you think how much better it can be done. Well, it is not something we want to see running in our servers. I hope that EF team improves generated SQL to acceptable level before Visual Studio 2010 is released. There is also morale of this example: you should always check out the queries that O/R-mapper generates. Behind the curtains it may silently generate queries that perform badly and in this case you need to optimize you data querying strategy. Conclusion Entity Framework 4.0 is new product with a lot of new features and it is clear that not everything is 100% super in its first release. But it still great step forward and I hope that on 12.04.2010 we have new promising O/R-mapper available to use in our projects. If you want to read more about Entity Framework 4.0 and Visual Studio 2010 then please feel free to follow this link to list of my Visual Studio 2010 and .NET Framework 4.0 postings.

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• Design pattern for an ASP.NET project using Entity Framework

  - by MPelletier

  I'm building a website in ASP.NET (Web Forms) on top of an engine with business rules (which basically resides in a separate DLL), connected to a database mapped with Entity Framework (in a 3rd, separate project). I designed the Engine first, which has an Entity Framework context, and then went on to work on the website, which presents various reports. I believe I made a terrible design mistake in that the website has its own context (which sounded normal at first). I present this mockup of the engine and a report page's code behind: Engine (in separate DLL): public Engine { DatabaseEntities _engineContext; public Engine() { // Connection string and procedure managed in DB layer _engineContext = DatabaseEntities.Connect(); } public ChangeSomeEntity(SomeEntity someEntity, int newValue) { //Suppose there's some validation too, non trivial stuff SomeEntity.Value = newValue; _engineContext.SaveChanges(); } } And report: public partial class MyReport : Page { Engine _engine; DatabaseEntities _webpageContext; public MyReport() { _engine = new Engine(); _databaseContext = DatabaseEntities.Connect(); } public void ChangeSomeEntityButton_Clicked(object sender, EventArgs e) { SomeEntity someEntity; //Wrong way: //Get the entity from the webpage context someEntity = _webpageContext.SomeEntities.Single(s => s.Id == SomeEntityId); //Send the entity from _webpageContext to the engine _engine.ChangeSomeEntity(someEntity, SomeEntityNewValue); // <- oops, conflict of context //Right(?) way: //Get the entity from the engine context someEntity = _engine.GetSomeEntity(SomeEntityId); //undefined above //Send the entity from the engine's context to the engine _engine.ChangeSomeEntity(someEntity, SomeEntityNewValue); // <- oops, conflict of context } } Because the webpage has its own context, giving the Engine an entity from a different context will cause an error. I happen to know not to do that, to only give the Engine entities from its own context. But this is a very error-prone design. I see the error of my ways now. I just don't know the right path. I'm considering: Creating the connection in the Engine and passing it off to the webpage. Always instantiate an Engine, make its context accessible from a property, sharing it. Possible problems: other conflicts? Slow? Concurrency issues if I want to expand to AJAX? Creating the connection from the webpage and passing it off to the Engine (I believe that's dependency injection?) Only talking through ID's. Creates redundancy, not always practical, sounds archaic. But at the same time, I already recuperate stuff from the page as ID's that I need to fetch anyways. What would be best compromise here for safety, ease-of-use and understanding, stability, and speed?

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• Using multiple diagrams per model in Entity Framework 5.0

  - by nikolaosk

  I have downloaded .Net framework 4.5 and Visual Studio 2012 since it was released to MSDN subscribers on the 15th of August.For people that do not know about that yet please have a look at Jason Zander's excellent blog post .Since then I have been investigating the many new features that have been introduced in this release.In this post I will be looking into theIn order to follow along this post you must have Visual Studio 2012 and .Net Framework 4.5 installed in your machine.Download and install VS 20120 using this link.My machine runs on Windows 8 and Visual Studio 2012 works just fine. I have also installed in my machine SQL Server 2012 developer edition. I have also downloaded and installed AdventureWorksLT2012 database.You can download this database from the codeplex website.   Before I start showcasing the demo I want to say that I strongly believe that Entity Framework is maturing really fast and now at version 5.0 can be used as your data access layer in all your .Net projects.I have posted extensively about Entity Framework in my blog.Please find all the EF related posts here. In this demo I will show you how to split an entity model into multiple diagrams using the new enhanced EF designer. We will not build an application in this demo.Sometimes our model can become too large to edit or view.In earlier versions we could only have one diagram per EDMX file.In EF 5.0 we can split the model into more diagrams.1) Launch VS 2012. Express edition will work fine.2) Create a New Project. From the available templates choose a Web Forms application  3) Add a new item in your project, an ADO.Net Entity Data Model. I have named it AdventureWorksLT.edmx.Then we will create the model from the database and click Next.Create a new connection by specifying the SQL Server instance and the database name and click OK.Then click Next in the wizard.In the next screen of the wizard select all the tables from the database and hit Finish.4) It will take a while for our .edmx diagram to be created. When I select an Entity (e.g Customer) from my diagram and right click on it,a new option appears "Move to new Diagram".Make sure you have the Model Browser window open.Have a look at the picture below 5) When we do that a new diagram is created and our new Entity is moved there.Have a look at the picture below  6) We can also right-click and include the related entities. Have a look at the picture below. 7) When we do that the related entities are copied to the new diagram.Have a look at the picture below  8) Now we can cut (CTRL+X) the entities from Diagram2 and paste them back to Diagram1.9) Finally another great enhancement of the EF 5.0 designer is that you can change colors in the various entities that make up the model.Select the entities you want to change color, then in the Properties window choose the color of your choice. Have a look at the picture below. To recap we have demonstrated how to split your entity model in multiple diagrams which comes handy in EF models that have a large number of entities in them Hope it helps!!!!

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• Implementing features in an Entity System

  - by Bane

  After asking two questions on Entity Systems (1, 2), and reading some articles on them, I think that I understand them much better than before. But, I still have some uncertainties, and mainly they are about building a Particle Emitter, an Input system, and a Camera. I obviously still have some problems understanding Entity Systems, and they might apply to a whole other range of objects, but I chose these three because they are very different concepts and should cover a pretty big ground, and help me understand Entity Systems and how to handle problems like these myself, as they come along. I am building an engine in Javascript, and I've implemented most of the core features, which include: input handling, flexible animation system, particle emitter, math classes and functions, scene handling, a camera and a render, and a whole bunch of other things that engines usually support. Then, I read Byte56's answer that got me interested into making the engine into an Entity System one. It would still remain an HTML5 game engine with the basic Scene philosophy, but it should support dynamic creation of entities from components. These are some of the definitions from the previous questions, updated: An Entity is an identifier. It doesn't have any data, it's not an object, it's a simple id that represents an index in the Scene's list of all entities (which I actually plan to implement as a component matrix). A Component is a data holder, but with methods that can operate on that data. The best example is a Vector2D, or a "Position" component. It has data: x and y, but also some methods that make operating on the data a bit easier: add(), normalize(), and so on. A System is something that can operate on a set of entities that meet the certain requirements, usually they (the entities) need to have a specified (by the system itself) set of components to be operated upon. The system is the "logic" part, the "algorithm" part, all the functionality supplied by components is purely for easier data management. The problem that I have now is fitting my old engine concept into this new programming paradigm. Lets start with the simplest one, a Camera. The camera has a position property (Vector2D), a rotation property and some methods for centering it around a point. Each frame, it is fed to a renderer, along with a scene, and all the objects are translated according to it's position. Then the scene is rendered. How could I represent this kind of an object in an Entity System? Would the camera be an entity or simply a component? A combination (see my answer)? Another issues that is bothering me is implementing a Particle Emitter. For what exactly I mean by that, you can check out my video of it: http://youtu.be/BObargIMQsE. The problem I have with this is, again, what should be what. I'm pretty sure that particles themselves shouldn't be entities, as I want to support 10k+ of them, and creating that much entities would be a heavy blow on my performance, I believe. Or maybe not? Depends on the implementation, but anyone with experience: please, do answer. The last bit I wan't to talk about, which is also bugging me the most, is how input should be handled. In my current version of the engine, there is a class called Input. It's a handler that subscribes to browser's events, such as keypresses, and mouse position changes, and also it maintains an internal state. Then, the player class has a react() method, which accepts an input object as an argument. The advantage of this is that the input object could be serialized into JSON and then shared over the network, allowing for smooth multiplayer simulations. But how does this translate into an Entity System?

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• Generically correcting data before save with Entity Framework

  - by koevoeter

  Been working with Entity Framework (.NET 4.0) for a week now for a data migration job and needed some code that generically corrects string values in the database. You probably also have seen things like empty strings instead of NULL or non-trimmed texts ("United States       ") in "old" databases, and you don't want to apply a correcting function on every column you migrate. Here's how I've done this (extending the partial class of my ObjectContext):public partial class MyDatacontext{    partial void OnContextCreated()    {        SavingChanges += OnSavingChanges;    }     private void OnSavingChanges(object sender, EventArgs e)    {        foreach (var entity in GetPersistingEntities(sender))        {            foreach (var propertyInfo in GetStringProperties(entity))            {                var value = (string)propertyInfo.GetValue(entity, null);                 if (value == null)                {                    continue;                }                 if (value.Trim().Length == 0 && IsNullable(propertyInfo))                {                    propertyInfo.SetValue(entity, null, null);                }                else if (value != value.Trim())                {                    propertyInfo.SetValue(entity, value.Trim(), null);                }            }        }    }     private IEnumerable<object> GetPersistingEntities(object sender)    {        return ((ObjectContext)sender).ObjectStateManager            .GetObjectStateEntries(EntityState.Added | EntityState.Modified)             .Select(e => e.Entity);    }    private IEnumerable<PropertyInfo> GetStringProperties(object entity)    {        return entity.GetType().GetProperties()            .Where(pi => pi.PropertyType == typeof(string));    }    private bool IsNullable(PropertyInfo propertyInfo)    {        return ((EdmScalarPropertyAttribute)propertyInfo             .GetCustomAttributes(typeof(EdmScalarPropertyAttribute), false)            .Single()).IsNullable;    }}   Obviously you can use similar code for other generic corrections.

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• StackOverflowException throws often when .net application built with Debug mode

  - by user1487950

  I have an application which access an external webservice often, when i are trying to debug it, means debuging in vistual studio. it often throws out StackOverflowException at the webserverice call point. when building in Release mode , the exception thrown out only occasionally. I checked the call stack, looks like there is no recursive call. can you please suggest? thank you very much. call statck attached. [In a sleep, wait, or join] mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) + 0x2b bytes mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) + 0x2d bytes System.dll!System.Net.NetworkAddressChangePolled.CheckAndReset() + 0x9d bytes System.dll!System.Net.NclUtilities.LocalAddresses.get() + 0x49 bytes System.dll!System.Net.WebProxyScriptHelper.myIpAddress() + 0x27 bytes [Native to Managed Transition] System.dll!System.Net.WebProxyScriptHelper.MyMethodInfo.Invoke(object target, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture) + 0x6b bytes MTOqoHCT.dll!JScript 0.myIpAddress(object this, Microsoft.JScript.Vsa.VsaEngine vsa Engine, object arguments) + 0x91 bytes MTOqoHCT.dll!JScript 0.FindProxyForURL(object this, Microsoft.JScript.Vsa.VsaEngine vsa Engine, object arguments, object url, object host) + 0x3c6e bytes MTOqoHCT.dll!__WebProxyScript.__WebProxyScript.ExecuteFindProxyForURL(object url, object host) + 0x11d bytes [Native to Managed Transition] Microsoft.JScript.dll!System.Net.VsaWebProxyScript.CallMethod(object targetObject, string name, object[] args) + 0x11a bytes Microsoft.JScript.dll!System.Net.VsaWebProxyScript.Run(string url, string host) + 0x74 bytes [Native to Managed Transition] [Managed to Native Transition] mscorlib.dll!System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage msg, int methodPtr, bool fExecuteInContext) + 0x1ef bytes mscorlib.dll!System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage msg) + 0xf bytes mscorlib.dll!System.Runtime.Remoting.Messaging.ServerObjectTerminatorSink.SyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage reqMsg) + 0x66 bytes mscorlib.dll!System.Runtime.Remoting.Messaging.ServerContextTerminatorSink.SyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage reqMsg) + 0x8a bytes mscorlib.dll!System.Runtime.Remoting.Channels.CrossContextChannel.SyncProcessMessageCallback(object[] args) + 0x94 bytes mscorlib.dll!System.Threading.Thread.CompleteCrossContextCallback(System.Threading.InternalCrossContextDelegate ftnToCall, object[] args) + 0x8 bytes [Native to Managed Transition] [Managed to Native Transition] mscorlib.dll!System.Runtime.Remoting.Channels.CrossContextChannel.SyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage reqMsg) + 0xa7 bytes mscorlib.dll!System.Runtime.Remoting.Channels.ChannelServices.SyncDispatchMessage(System.Runtime.Remoting.Messaging.IMessage msg) + 0x92 bytes mscorlib.dll!System.Runtime.Remoting.Channels.CrossAppDomainSink.DoDispatch(byte[] reqStmBuff, System.Runtime.Remoting.Messaging.SmuggledMethodCallMessage smuggledMcm, out System.Runtime.Remoting.Messaging.SmuggledMethodReturnMessage smuggledMrm) + 0xed bytes mscorlib.dll!System.Runtime.Remoting.Channels.CrossAppDomainSink.DoTransitionDispatchCallback(object[] args) + 0x8a bytes mscorlib.dll!System.Threading.Thread.CompleteCrossContextCallback(System.Threading.InternalCrossContextDelegate ftnToCall, object[] args) + 0x8 bytes [Appdomain Transition] mscorlib.dll!System.Runtime.Remoting.Channels.CrossAppDomainSink.DoTransitionDispatch(byte[] reqStmBuff, System.Runtime.Remoting.Messaging.SmuggledMethodCallMessage smuggledMcm, out System.Runtime.Remoting.Messaging.SmuggledMethodReturnMessage smuggledMrm) + 0x74 bytes mscorlib.dll!System.Runtime.Remoting.Channels.CrossAppDomainSink.SyncProcessMessage(System.Runtime.Remoting.Messaging.IMessage reqMsg) + 0xa3 bytes mscorlib.dll!System.Runtime.Remoting.Proxies.RemotingProxy.CallProcessMessage(System.Runtime.Remoting.Messaging.IMessageSink ms, System.Runtime.Remoting.Messaging.IMessage reqMsg, System.Runtime.Remoting.Contexts.ArrayWithSize proxySinks, System.Threading.Thread currentThread, System.Runtime.Remoting.Contexts.Context currentContext, bool bSkippingContextChain) + 0x50 bytes mscorlib.dll!System.Runtime.Remoting.Proxies.RemotingProxy.InternalInvoke(System.Runtime.Remoting.Messaging.IMethodCallMessage reqMcmMsg, bool useDispatchMessage, int callType) + 0x1d5 bytes mscorlib.dll!System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(System.Runtime.Remoting.Messaging.IMessage reqMsg) + 0x66 bytes mscorlib.dll!System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(ref System.Runtime.Remoting.Proxies.MessageData msgData, int type) + 0xee bytes System.dll!System.Net.NetWebProxyFinder.GetProxies(System.Uri destination, out System.Collections.Generic.IList<string> proxyList) + 0x83 bytes System.dll!System.Net.AutoWebProxyScriptEngine.GetProxies(System.Uri destination, out System.Collections.Generic.IList<string> proxyList, ref int syncStatus) + 0x84 bytes System.dll!System.Net.WebProxy.GetProxiesAuto(System.Uri destination, ref int syncStatus) + 0x2e bytes System.dll!System.Net.ProxyScriptChain.GetNextProxy(out System.Uri proxy) + 0x2e bytes System.dll!System.Net.ProxyChain.ProxyEnumerator.MoveNext() + 0x98 bytes System.dll!System.Net.ServicePointManager.FindServicePoint(System.Uri address, System.Net.IWebProxy proxy, out System.Net.ProxyChain chain, ref System.Net.HttpAbortDelegate abortDelegate, ref int abortState) + 0x120 bytes System.dll!System.Net.HttpWebRequest.FindServicePoint(bool forceFind) + 0xb1 bytes System.dll!System.Net.HttpWebRequest.GetRequestStream(out System.Net.TransportContext context) + 0x247 bytes System.dll!System.Net.HttpWebRequest.GetRequestStream() + 0xe bytes System.Web.Services.dll!System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(string methodName, object[] parameters) + 0xc0 bytes Gfinet.Config.dll!Gfinet.Config.Service.cfg_webservice.addOrUpdateProperties(string string, int intVal, Gfinet.Config.Service.PropertiesDataM[] propertiesDataMs) + 0xa3 bytes Gfinet.Config.dll!Gfinet.Config.Service.WSServiceImpl.AddOrUpdateProperties(int setId, Gfinet.Config.Service.PropertiesDataM[] properties) + 0x46 bytes [Native to Managed Transition] Gfinet.Config.dll!Gfinet.Config.Service.ServiceAspect.InvocationHandler(object target, System.Reflection.MethodBase method, object[] parameters) + 0x49e bytes Gfinet.Config.dll!Gfinet.Config.DynamicProxy.DynamicProxyImpl.Invoke(System.Runtime.Remoting.Messaging.IMessage message) + 0x110 bytes mscorlib.dll!System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(ref System.Runtime.Remoting.Proxies.MessageData msgData, int type) + 0xee bytes Tici.Kraps.Services.dll!Tici.Kraps.Services.Configuration.GFINetConfiguration.StoreElement(string application, string category, string id, string elementValue, bool save) Line 303 + 0x55 bytes C# Tici.Kraps.Services.dll!Tici.Kraps.Services.Configuration.GFINetConfiguration.SaveAllInternal() Line 582 + 0x6e bytes C# Tici.Kraps.Services.dll!Tici.Kraps.Services.Configuration.GFINetConfiguration.SaveAll(bool async) Line 434 + 0x8 bytes C# Tici.Kraps.Services.dll!Tici.Kraps.Services.Configuration.GFINetConfiguration.SaveAll() Line 406 + 0xa bytes C# Tici.Kraps.Services.dll!Tici.Kraps.Services.Container.Persistor.Save() Line 59 + 0xc bytes C# Spark.exe!Tici.Kraps.RibbonShell.OnBtnSaveWorkspaceItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) Line 642 + 0xf bytes C# DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.BarItem.OnClick(DevExpress.XtraBars.BarItemLink link) + 0x108 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.BarBaseButtonItem.OnClick(DevExpress.XtraBars.BarItemLink link) + 0x47 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.BarItemLink.OnLinkClick() + 0x245 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.BarItemLink.OnLinkAction(DevExpress.XtraBars.BarLinkAction action, object actionArgs) + 0xb3 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.BarButtonItemLink.OnLinkAction(DevExpress.XtraBars.BarLinkAction action, object actionArgs) + 0x47e bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.BarItemLink.OnLinkActionCore(DevExpress.XtraBars.BarLinkAction action, object actionArgs) + 0x82 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.ViewInfo.BarSelectionInfo.ClickLink(DevExpress.XtraBars.BarItemLink link) + 0x85 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.ViewInfo.BarSelectionInfo.UnPressLink(DevExpress.XtraBars.BarItemLink link) + 0x1e5 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.Ribbon.Handler.BaseRibbonHandler.OnUnPressItem(DevExpress.Utils.DXMouseEventArgs e, DevExpress.XtraBars.Ribbon.ViewInfo.RibbonHitInfo hitInfo) + 0xa7 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.Ribbon.Handler.BaseRibbonHandler.OnUnPress(DevExpress.Utils.DXMouseEventArgs e, DevExpress.XtraBars.Ribbon.ViewInfo.RibbonHitInfo hitInfo) + 0x5f bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.Ribbon.Handler.BaseRibbonHandler.OnMouseUp(DevExpress.Utils.DXMouseEventArgs e) + 0x19a bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.Ribbon.Handler.RibbonHandler.OnMouseUp(DevExpress.Utils.DXMouseEventArgs e) + 0x47 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.Ribbon.RibbonControl.OnMouseUp(System.Windows.Forms.MouseEventArgs e) + 0x95 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.WmMouseUp(ref System.Windows.Forms.Message m, System.Windows.Forms.MouseButtons button, int clicks) + 0x2d1 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.WndProc(ref System.Windows.Forms.Message m) + 0x93a bytes DevExpress.Utils.v11.2.dll!DevExpress.Utils.Controls.ControlBase.WndProc(ref System.Windows.Forms.Message m) + 0x81 bytes DevExpress.XtraBars.v11.2.dll!DevExpress.XtraBars.Ribbon.RibbonControl.WndProc(ref System.Windows.Forms.Message m) + 0x85 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.OnMessage(ref System.Windows.Forms.Message m) + 0x13 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.WndProc(ref System.Windows.Forms.Message m) + 0x31 bytes System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.Callback(System.IntPtr hWnd, int msg, System.IntPtr wparam, System.IntPtr lparam) + 0x96 bytes [Native to Managed Transition] [Managed to Native Transition] DevExpress.Utils.v11.2.dll!DevExpress.Utils.Win.Hook.ControlWndHook.WindowProc(System.IntPtr hWnd, int message, System.IntPtr wParam, System.IntPtr lParam) + 0x159 bytes [Native to Managed Transition] [Managed to Native Transition] System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(System.IntPtr dwComponentID, int reason, int pvLoopData) + 0x287 bytes System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason, System.Windows.Forms.ApplicationContext context) + 0x16c bytes System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) + 0x61 bytes System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.Forms.Form mainForm) + 0x31 bytes Tici.Kraps.Services.dll!Tici.Kraps.Services.Container.DefaultApplicationRunner.Run() Line 41 + 0x17 bytes C# Kraps.exe!Tici.Kraps.Program.Main() Line 105 + 0x9 bytes C# [Native to Managed Transition] [Managed to Native Transition] mscorlib.dll!System.AppDomain.ExecuteAssembly(string assemblyFile, System.Security.Policy.Evidence assemblySecurity, string[] args) + 0x6d bytes Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() + 0x2a bytes mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x63 bytes mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool ignoreSyncCtx) + 0xb0 bytes mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x2c bytes mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes [Native to Managed Transition]

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