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• Current ways to do data binding in .NET 3.5 with C# 3.0 and WinForms

  - by kryptic

  Hello Everyone, I have an existing C# 3.0 WinForms project with .NET 3.5 that talks to a MySQL database. I would like to use data binding (I'm new to this, so I've been doing all of the UI updates manually) to simplify things. I followed a link from this question to this article which mentions using a DataSet but also follows up with "my view on this topic is strongly in favor of Business Objects." Also that was with .NET 2.0. What are the current methods to use data binding with a WinForms application? What are their advantages in terms of simplicity, how much additional code is necessary, etc. For reference, I use an ORM approach to build objects with public properties from a database. I want to map these properties for each object onto UI elements like TextBoxes. There could be many properties for an object so I want to simplify the code to do this.

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• VS 2010 MVC Formatting

  - by Brian

  Hello, MVC is formatting my code horribly, and I was wondering if you can turn it off? I feel the answer is no, but I was hoping VS 2010 had built in a setting... Here's what its formatting as: <% if (org.UserKey.HasValue) { %> <%= org.Reference(i => i.UserReference).Email%> <% } else { %> <%= org.UserEmail%> <% } %> I want the beginning brackets on the same line as the if and the else... Thanks.

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• Cleanup for control inside a FlowDocument

  - by Thorarin

  I have a custom control that I use inside a FlowDocument. The control uses a System.Drawing.ImageAnimator to display transparent, animated GIF images. Why is this such a pain in the butt in WPF anyway? :P In my original implementation, this was causing memory leaks when a paragraph containing the control was being deleted from the document, because the ImageAnimator kept a reference to the control for event handling. I've now implemented a WeakEventManager pattern which seems to indeed fix the leak itself, but I would like to stop "OnFrameChanged" events from being fired if a particular animated GIF is not currently in the document, instead of relying on the garbage collector to eventually collect the control objects and my event manager to notice that there no longer are valid listeners to the event. Basically, I would like to take a more active role in this and have the control react to being removed from the FlowDocument. Is there some way to do this? I've been unable to find it. OnVisualParentChanged doesn't get fired, because the direct parent (a Paragraph) is unchanged.

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• XIB-instantiated Object's IBOutlet is nil

  - by jxpx777

  I have a XIB set up like in this screenshot: File's owner is my main window controller. The XIB is also in charge of creating an object that serves as the delegate for the MGScopeBar view. As you can see in the screenshot, the scope bar delegate has an IBOutlet for the search field so that it can return it as an extra view as part of the delegate process. The problem I'm having is that when the delegate object is queried for the accessory view, the IBOutlet NSSearchField is nil. I'm fairly certain this has something to do with the order that objects are created, IBOutlets wired, etc, but I'm just a little lost as to where in the process I can expect the search field to exist so that the scope bar delegate can reference it properly. Thanks in advance for any pointers.

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• Doctrine Mssql uniqueidentifier isn't cast as char or nvarchar when retrieved from the database.

  - by Tres

  When I retrieve a record from the database which has a column of type "uniqueidentifier", Doctrine fills it with "null" rather than the unique id from the database. Some research and testing has brought this down to a PDO/dblib driver issue. When directly querying via PDO, null is returned in place of the unique id. For reference, http://trac.doctrine-project.org/ticket/1096, has a bit on this, however, it was updated 11 months ago with no comment for resolution. A way around this, as mentioned at http://bugs.php.net/bug.php?id=24752&edit=1, is to cast the column as a char. However, it doesn't seem Doctrine exposes the native field type outside of generating models which makes it a bit hard to detect uniqueidentifier types and cast them internally when building the sql query. Has anyone found a workaround for this?

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• SQL ConnectionString in global.asax overridden by web.config

  - by rlb.usa

  This is going to sound very odd, but I have a web.config like this: <connectionStrings> <remove name="LocalSqlServer"/> <add name="LocalSqlServer" connectionString="Data Source=BACKUPDB;..." providerName="System.Data.SqlClient"/> </connectionStrings> And a global.asax like this: void Session_Start(object sender, EventArgs e) { // Code that runs when a new session is started if (Application["con"] == null || Application["con"] == "") { Application["con"] = "Data Source=PRODUCTIONDB;..."; } } And EVERYWHERE in my code, I reference my ConnectionStrings like this: SqlConnection con = new SqlConnection(Convert.ToString(HttpContext.Current.Application["con"])); However, I see that everything I do inside this application goes to BACKUP db instead of PRODUCTIONDB. What is going on, how could this happen, and why? It doesn't make any sense to me, and it got me into a lot of trouble. We use LocalSqlServer string for FormsAuthentication.

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• Problems setting up an ASP.NET MVC site on IIS7 w/ Nhibernate

  - by Brandon

  When deploying my published website to the host (Its a shared hosting plan) I get this error: [NullReferenceException: Object reference not set to an instance of an object.] System.Web.PipelineStepManager.ResumeSteps(Exception error) +929 System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context, AsyncCallback cb) +91 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +508 I found this question which describes my problem, but I'm not initializing NHibernate in Application_Start, it is already being done in Init. The only other cause of this error I can find is that the Global.asax file is inheriting from a class other than HttpApplication, but I'm not doing that either. This is pretty much the Global.asax file protected void Application_Start() { AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); } public override void Init() { base.Init(); if (_wasNHibernateInitialized) return; // Initialize NHibernate // Other setup like the StructureMap initialization } Is there any other reason why an ASP.NET MVC application would give this error when being deployed to IIS7?

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• Decoding subsampled bitmaps in Android

  - by hgpc

  I decode bitmaps from the SD card using BitmapFactory.decodeFile. Sometimes the bitmaps are bigger than what the application needs or that the heap allows, so I use BitmapFactory.Options.inSampleSize to request a subsampled (smaller) bitmap. The problem is that the platform does not enforce the exact value of inSampleSize, and I sometimes end up with a bitmap either too small, or still too big for the available memory. From http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html#inSampleSize: Note: the decoder will try to fulfill this request, but the resulting bitmap may have different dimensions that precisely what has been requested. Also, powers of 2 are often faster/easier for the decoder to honor. How should I decode bitmaps from the SD card to get a bitmap of the exact size I need while consuming as little memory as possible to decode it?

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• Sequel Migration not running up?

  - by Sleepycat

  Having some trouble with the Migrations in Sequel and could use another set of eyes. I am running a migration that looks ok but no table is created. It is definitely connecting because I can see the schema_info table has been created. -M 0/1 changes the version as you would expect but still no table. The command: sequel -m . -M 1 ~/Desktop/dbtest/testdb.yml 001_testdb.rb: class TestDb < Sequel::Migration def up create_table( "terminals") do primary_key :id Integer :location_id Integer :merchant_id BigDecimal :terminal_id, :size=>[11, 0] String :reference, :size=>255 DateTime :created_at DateTime :updated_at String :image, :default=>"default.jpg", :size=>255 end end def down drop_table :terminals end end The output in Postgres: test_db=# \dt List of relations Schema | Name | Type | Owner --------+-------------+-------+---------- public | schema_info | table | postgres (1 row) test_db=# select * from schema_info; version --------- 1 (1 row)

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• Combining deflate and minify - am i creating overhead?

  - by Mark Nolan

  I minify my css and js files on the fly with google.codes minify. I have also set my .htaccess to use deflate on all my css and js files - the reason beeing some js files (like shadowbox and tinymce) reference to other js files in the code. So i'm compressing with apache deflate and also minify compresses some js and css files with gzip - am i creating overhead by doing this - first gzipping (minify) and then zlib (deflate) will run through again. Or will apache deflate ignore the already gzipped files having the attributes set by minify in the headers. Anyone have any experiences with this?

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• MVC2 Annotations dll not found by VS2008 compiler, how do I make it look in the right place?

  - by Paul Connolly

  I have VS2008 SP1 running with .NET 3.5 SP1 I have MVC2 running (with MVC1 uninstalled) All works ok except when I call the System.Components.DatAnnotations.dll, then the compiler complains of not being able to find it. Message is: Could not load file or assembly 'System.ComponentModel.DataAnnotations, Version=99.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. I tried repairing and reinstalling SP1 of both VS and .Net framework. I also tried referencing the assembly by browsing to it in the Reference assemblies in Programs directory. I have tried out most of the Google search result forum results but to no avail, I think it may be something simple which I have over looked. Any ideas?

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• Persistence with Vaadin

  - by palto

  Hi I'm trying to learn vaadin. I'm really confused how to do any kind of application development with persistence because if I have a reference to my service layer objects, they get stored in session and I really don't want that. Persistence stuff just isn't serializable. My case is that I have an already made application that uses Spring and I'm creating a new UI for it with Vaadin. I can inject the spring stuff to my Vaadin application but that gets stored in the session. Any tips? By the way how do you post in the Vaadin forums? I can't find a post button or way to register :)

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• UnitOfWork & StrcutureMap & Desktop Application

  - by Afshin Gh

  When developing Web App and using StrcutureMap i normally use HybridHttpOrThreadLocalScoped for my UnitOfWork Part. (unit of work starts up per web request and ...) What about a desktop app(windows service, console, ...)? There is no session and request in a desktop app. How should i manage UoW in this situation? any good reference or article? I don't want to make it singleton. What should I do?

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• Could you help me understand how to create a C# api by setting the scope of methods, objects, proper

  - by highone

  The answer to this SO question says that you can create an api by exposing methods, objects and .ect by setting their scope to public. http://stackoverflow.com/questions/630971/how-to-start-creating-an-application-api-in-net One of the main things I want to expose is the text of a textbox. Would the best way to do this be to create a public static Text property that is updated by the textbox's textchanged event? Also what would a developer do in order to interact with this text property? Would they add a reference to the program .exe in their program? Please help, I'm quite clueless here. Also was not sure how to word this question, feel free it edit if it is unclear.

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• Issue converting Sitecore Item[] using ToList<T>

  - by philba888

  Working with Sitecore and Linq extensions. I am trying to convert to from an item array to the list using the following piece of code: Item variationsFolder = masterDB.SelectSingleItem(VariationsFolderID.ToString()); List<Item> variationList = variationsFolder.GetChildren().ToList<Item>(); However I keep getting this error whenever I try to build: 'Sitecore.Collections.ChildList' does not contain a definition for 'ToList' and the best extension method overload 'System.Linq.Enumerable.ToList<TSource>(System.Collections.Generic.IEnumerable<TSource>)' has some invalid arguments I have the following usings: using System.Linq; using System.Xml.Linq; Am referencing: System.Core I've just copied this code from another location, so it should work fine, can only think that there is something simple (like a reference or something that I am missing).

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• How to transfer large amount of data using WCF?

  - by JSprang

  We are currently trying to move large amounts of data to a Silverlight 3 client using WCF with PollingDuplex. I have read about the MultiplerMessagesPerPoll in Silverlight 4 and it appears to be quite a bit faster. Are there any examples out there for me to reference (using MultipleMessagesPerPoll)? Or maybe some good references on using Net.TCP? Maybe I should be taking a completely different approach? Any ideas or suggestions would be greatly appreciated. Thanks!

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• How far does Dependency Injection reach?

  - by Baddie

  My web app solution consists of 3 projects: Web App (ASP.NET MVC) Business Logic Layer (Class Library) Database Layer (Entity Framework) I want to use Ninject to manage the lifetime of the DataContext generated by the Entity Framework in the Database Layer. The Business Logic layer consists of classes which reference repositories (located in the database layer) and my ASP.NET MVC app references the business logic layer's service classes to run code. Each repository creates an instance of the MyDataContext object from the Entity Framework Repository public class MyRepository { private MyDataContext db; public MyRepository { this.db = new MyDataContext(); } // methods } Business Logic Classes public class BizLogicClass { private MyRepository repos; public MyRepository { this.repos = new MyRepository(); } // do stuff with the repos } Will Ninject handle the lifetime of MyDataContext despite the lengthy dependency chain from the Web App to the Data Layer?

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• Asp.Net 3.5 Routing to Webservice?

  - by Maushu

  I was looking for a way to route http://www.example.com/WebService.asmx to http://www.example.com/service/ using only the ASP.NET 3.5 Routing framework without needing to configure the IIS server. Until now I have done what most tutorials told me, added a reference to the routing assembly, configured stuff in the web.config, added this to the Global.asax: protected void Application_Start(object sender, EventArgs e) { RouteCollection routes = RouteTable.Routes; routes.Add( "WebService", new Route("service/{*Action}", new WebServiceRouteHandler()) ); } ...created this class: public class WebServiceRouteHandler : IRouteHandler { public IHttpHandler GetHttpHandler(RequestContext requestContext) { // What now? } } ...and the problem is right there, I don't know what to do. The tutorials and guides I've read use routing for pages, not webservices. Is this even possible? Ps: The route handler is working, I can visit /service/ and it throws the NotImplementedException I left in the GetHttpHandler method.

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• ctags doesn't work when class is defined like "class Gem::SystemExitException"

  - by dan

  You can define a class in a namespace like this class Gem class SystemExitException end end or class Gem::SystemExitException end When code uses first method of class definition, ctags indexes the class definition like this: SystemExitException test_class.rb /^ class SystemExitException$/;" c class:Gem With the second way, ctags indexes it like this: Gem rubygems/exceptions.rb /^class Gem::SystemExitException < SystemExit$/;" c The problem with the second way is that you can't put your cursor (in vim) over a reference to "Gem::SystemExitException" and have that jump straight to the class definition. Your only recourse is to page through all the (110!) class definitions that start with "Gem::" and find the one you're looking for. Does anyone know of a workaround? Maybe I should report this to the maintainer of ctags?

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• Nested resources in namespace form_for

  - by Nelson LaQuet

  Problem The form_for helper incorrectly determines the path to my nested resource inside of a namespace. The models in question are: Forum::Thread and Forum::Reply respectively, located in a subfolder called "forum" under my models directory. This is in Rails 3 BETA 3. routes.rb namespace :forum do root :to => 'threads#index' resources :threads do resources :replies end end app/views/forum/replies/_form.html.haml ... - form_for [@thread, @reply] do |f| ... app/controllers/forum/replies_controller.rb ... def new @reply = Forum::Reply.new end ... Error undefined method `forum_thread_forum_replies_path' In reference to the line outlined above in _form.html.haml

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• In Android: How to Call Function of Activity from a Service?

  - by nex

  Hi folks, I have an Activity (A) and a Service (S) which gets started by A like this: Intent i = new Intent(); i.putExtra("updateInterval", 10); i.setClassName("com.blah", "com.blah.S"); startService(i); A have a function like this one in A: public void someInfoArrived(Info i){...} Now I want to call A.someInfoArrived(i) from within S. Intent.putExtra has no version where I could pass an Object reference etc ... Please help! PS: The other way around (A polling S for new info) is NOT what I need. I found enough info about how to do that.

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• Generating VS 2005 .vcproj's by hand

  - by Kevin

  I'm working on a script that generates Visual Studio 2005 C++ project files (.vcproj). The script reads a makefile, then spits out a c++ project. INPUT: makefile --- OUTPUT: VS 2005 c++ project (.vcproj) However, when I try to build the auto-generated project in VS 2005, error outputs: "Unspecified Error." Evidently, I am not generating the VS 2005 .vcproj file correctly. Assuming that my c++ project file was malformed, I opened up VS 2005 and made a new C++ project. I actually copied the good, VS 2005-created project file to my non-working, malformed project file. I replaced the Name, Reference Includes (.libs), Compile Includes (.cc, .c), etc. in the good VS 2005 project with my malformed project file's information. However, I still cannot get VS 2005 to compile my .vcproj. Perhaps VS 2005 is very particular about the content of its .vcproj's? Please give me advice on how to manually generate a VS 2005 .vcproj. Thanks!

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• Exceptions in constructors

  - by FredOverflow

  In C++, the lifetime of an object begins when the constructor finishes successfully. Inside the constructor, the object does not exist yet. Q: What does emitting an exception from a constructor mean? A: It means that construction has failed, the object never existed, its lifetime never began. [source] My question is: Does the same hold true for Java? What happens, for example, if I hand this to another object, and then my constructor fails? Foo() { Bar.remember(this); throw new IllegalStateException(); } Is this well-defined? Does Bar now have a reference to a non-object?

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• calling a function or communicating from one browser window to another using Jquery / javascript

  - by Shanon

  Hello, I am designing a web site that plays music. The music player itself will be in a separate window along with the now playing list. I want to be able to refresh the now playing list when a new song is added to it from the main window. Essentially I need to figure out how to communicate between the two windows. I was only able to find one plugin on line that defines the player page as a child of the main page but then this reference would be lost after the parent page i.e my main page was refreshed. So this was not very useful to me and I'm kinda lost atm. Any help is greatly appreciated PS: here is the link to that plugin (http://www.sfpeter.com/2008/03/13/communication-between-browser-windows-with-jquery-my-new-plugin/)

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• What open source database platform is most easily transferred from my personal machine into a window

  - by Tom

  I would like eventual interaction with MS Dynamics SL and/or MindTouch Core (running on WMware) for eventual intranet and/or internet display. I guess I am asking for front and back end recommendations for a database I am constructing, but since this is my first major project I would greatly appreciate any help and advice. I would also love an opportunity to learn a new language so the code base could be in any language. I do have a few more related questions for discussion; What is the viability of using Google hosting to provide the service to the public for free? Should I implement plone or another CMS if I have a large amount of output? Is there a structuring questionnaire or standards publication I could reference? Does UML diagramming provide additional options for portability? Thank you.

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