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  • AStar in a specific case in C#

    - by KiTe
    Hello. To an intership, I have use the A* algorithm in the following case : the unit shape is a square of height and width of 1, we can travel from a zone represented by a rectangle from another, but we can't travel outside these predifined areas, we can go from a rectangle to another through a door, represented by a segment on corresponding square edge. Here are the 2 things I already did but which didn't satisfied my boss : 1 : I created the following classes : -a Door class which contains the location of the 2 separated squares and the door's orientation (top, left, bottom, right), -a Map class which contains a door list, a rectangle list representing the walkable areas and a 2D array representing the ground's squares (for additionnal infomations through an enumeration) - classes for the A* algorithm (node, AStar) 2 : -a MapCase class, which contains information about the case effect and doors through an enumeration (with [FLAGS] attribute set on, to be able to cummulate several information on each case) -a Map classes which only contains a 2D array of MapCase classes - the classes for the A* algorithm (still node an AStar). Since the 2 version is better than the first (less useless calculation, better map classes architecture), my boss is not still satisfied about my mapping classes architecture. The A* and node classes are good and easily mainainable, so I don't think I have to explain them deeper for now. So here is my asking : has somebody a good idea to implement the A* with the problem specification (rectangle walkable but with a square unit area, travelling through doors)? He said that a grid vision of the problem (so a 2D array) shouldn't be the correct way to solve the problem. I wish I've been clear while exposing my problem .. Thanks KiTe

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  • WPF 4 Datagrid with ComboBox

    - by Doug
    I have a WPF 4 app with a ComboBox embedded in a DataGrid. The ComboBox is in a template column that displays the combobox when in edit mode but just a TextBlock otherwise. If I edit the cell and pick a new value from the combobox, when leaving the cell, the TextBlock in view mode does not reflect the new value. Ultimately, the new value gets saved and is displayed when the window is refreshed but it does not happen while still editing in the grid. Here are the parts that are making this more complicated. The grid and the combobox are bound to different ItemsSource from the EnityFramework which is tied to my database. For this problem, the grid is displaying project members. The project member name can be picked from the combobox which gives a list of all company employees. Any ideas on how to tie the view mode of the DataGridColumnTemplate to the edit value when they are pointing to different DataSources? Relevant XAML <Window.Resources> <ObjectDataProvider x:Key="EmployeeODP" /> </Window.Resources> <StackPanel> <DataGrid Name="teamProjectGrid" AutoGenerateColumns="false" ItemsSource="{Binding Path=ProjectMembers}" <DataGrid.Columns> <DataGridTemplateColumn Header="Name" x:Name="colProjectMember"> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBlock Text="{Binding Path=ProjectMemberFullName}" /> </DataTemplate> </DataGridTemplateColumn.CellTemplate> <DataGridTemplateColumn.CellEditingTemplate> <DataTemplate> <ComboBox x:Name="ProjectMemberCombo" IsReadOnly="True" DisplayMemberPath="FullName" SelectedValue="{Binding Path=Employee}" ItemsSource="{Binding Source={StaticResource EmployeeODP}}" /> </DataTemplate> </DataGridTemplateColumn.CellEditingTemplate> </DataGridTemplateColumn> <DataGridTextColumn x:Name="colProjectRole" Binding="{Binding Path=ProjectRole}" Header="Role" /> </DataGrid.Columns> </DataGrid> </StackPanel> Relevant Code Behind this.DataContext = new MyEntityLibrary.MyProjectEntities(); ObjectDataProvider EmployeeODP= (ObjectDataProvider)FindResource("EmployeeODP"); if (EmployeeODP != null) { EmployeeODP.ObjectInstance = this.DataContext.Employees; }

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  • Spring redirecting back to referrer

    - by Eqbal
    I have some resources in my application that require redirection to another resource (form) if some context information is not set. After the context gets set (requires two user steps), I need to redirect back to the requested resource. How do I achieve that. I am using annotation based controllers in Spring 3. Is org.springframework.security.web.savedrequest.HttpSessionRequestCache of any use.

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  • How to best show progress info when using ADO.NET?

    - by Yadyn
    I want to show the user detailed progress information when performing potentially lengthy database operations. Specifically, when inserting/updating data that may be on the order of hundreds of KB or MB. Currently, I'm using in-memory DataTables and DataRows which are then synced with the database via TableAdapter.Update calls. This works fine and dandy, but the single call leaves little opportunity to glean any kind of progress info to show to the user. I have no idea how much data is passing through the network to the remote DB or its progress. Basically, all I know is when Update returns and it is assumed complete (barring any errors or exceptions). But this means all I can show is 0% and then a pause and then 100%. I can count the number of rows, even going so far to cound how many are actually Modified or Added, and I could even maybe calculate per DataRow its estimated size based on the datatype of each column, using sizeof for value types like int and checking length for things like strings or byte arrays. With that, I could probably determine, before updating, an estimated total transfer size, but I'm still stuck without any progress info once Update is called on the TableAdapter. Am I stuck just using an indeterminate progress bar or mouse waiting cursor? Would I need to radically change our data access layer to be able to hook into this kind of information? Even if I can't get it down to the precise KB transferred (like a web browser file download progress bar), could I at least know when each DataRow/DataTable finishes or something? How do you best show this kind of progress info using ADO.NET?

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  • How do I create Twitter style URL's for my app - Using existing application or app redesign - Ruby o

    - by bgadoci
    I have developed a blog application of sorts that I am trying to allow other users to take advantage of (for free and mostly for family). I wondering if the authentication I have set up will allow for such a thing. Here is the scenario. Currently the application allows for users to sign up for an account and when they do so they can create blog posts and organize those posts via tags. The application displays no data publicly (another words, you have to login to see anything). To gain access you have to create an account and even after you do, you cannot see anyone else's information as the applications filters using the current_user method and displays in the /posts/index.html.erb page. This would be great if a user only wanted to blog and share it with themselves, not really what I am looking for. My question has two parts (hopefully I won't make anyone mad by not putting these into two questions) Is it possible for a particular users data to live at www.myapplication.com/user without moving everything to the /user/show.html.erb file? Is it possible to make some of that information (living at the URL) public but still require login for create and destroy actions. Essentially, exactly like twitter. I am just curious if I can get from where I am (using the current_user methods across controllers to display in /posts/index.html.erb) to where I want to be. My fear is that I have to redesign the app such that the user data lives in the /user/show.html.erb page. Thoughts?

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  • How do I create Twitter style URLs for my app - Using existing application or app redesign - Ruby on

    - by bgadoci
    I have developed a blog application of sorts that I am trying to allow other users to take advantage of (for free and mostly for family). I wondering if the authentication I have set up will allow for such a thing. Here is the scenario. Currently the application allows for users to sign up for an account and when they do so they can create blog posts and organize those posts via tags. The application displays no data publicly (another words, you have to login to see anything). To gain access you have to create an account and even after you do, you cannot see anyone else's information as the applications filters using the current_user method and displays in the /posts/index.html.erb page. This would be great if a user only wanted to blog and share it with themselves, not really what I am looking for. My question has two parts (hopefully I won't make anyone mad by not putting these into two questions) Is it possible for a particular users data to live at www.myapplication.com/user without moving everything to the /user/show.html.erb file? Is it possible to make some of that information (living at the URL) public but still require login for create and destroy actions. Essentially, exactly like twitter. I am just curious if I can get from where I am (using the current_user methods across controllers to display in /posts/index.html.erb) to where I want to be. My fear is that I have to redesign the app such that the user data lives in the /user/show.html.erb page. Thoughts? UPDATE: I am using Clearance for authentication by Thoughtbot. I wonder if there is something I can set in the vendored gem path to represent the /posts/index.html.erb code as the /user/id code and replace id with the user name.

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  • Is there a utility that can monitor open windows/ in .net winforms?

    - by Jules
    This is a general question, but I'll explain my specific need at the moment: I want to find the framework class that enables one to choose an image at design-time. I can find the editor that is used at run-time - its the Drawing.Design.ImageEditor. At design time, however, a different editor pops up which allows one to choose an image from resources. I'm guessing I could run some kind of program, then open up the image editor, from the property grid, and see what new windows/classes have been created? Thanks

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  • Sample twitter application.

    - by Jack
    <?php function updateTwitter($status) { // Twitter login information $username = 'xxxxx'; $password = 'xxxxxx'; // The url of the update function $url = 'http://twitter.com/statuses/update.xml'; // Arguments we are posting to Twitter $postargs = 'status='.urlencode($status); // Will store the response we get from Twitter $responseInfo=array(); // Initialize CURL $ch = curl_init($url); // Tell CURL we are doing a POST curl_setopt ($ch, CURLOPT_POST, true); // Give CURL the arguments in the POST curl_setopt ($ch, CURLOPT_POSTFIELDS, $postargs); // Set the username and password in the CURL call curl_setopt($ch, CURLOPT_USERPWD, $username.':'.$password); // Set some cur flags (not too important) curl_setopt($ch, CURLOPT_VERBOSE, 1); curl_setopt($ch, CURLOPT_NOBODY, 0); curl_setopt($ch, CURLOPT_HEADER, 0); curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // execute the CURL call $response = curl_exec($ch); // Get information about the response $responseInfo=curl_getinfo($ch); // Close the CURL connection curl_close($ch); // Make sure we received a response from Twitter if(intval($responseInfo['http_code'])==200){ // Display the response from Twitter echo $response; }else{ // Something went wrong echo "Error: " . $responseInfo['http_code']; } } updateTwitter("Just finished a sweet tutorial on http://brandontreb.com"); ?> I get the following output Error: 0 Please help.

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  • Weak References and Disposable objects.

    - by Steve Sheldon
    In C# it is possible to create weak references to objects as described here: WeakReference Class In .net some classes also implement the IDisposable interface. Calling the Dispose method of this interface is performed to manually dispose of any managed or unmanaged resources currently being held onto. An example might be a Bitmap object or class. If I assign an object that implements IDisposable to a weak reference, will Dispose be called if the weak reference collects the object?

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  • VS2010 error: Cannot find custom tool 'GlobalResourceProxyGenerator' on this system.

    - by artvolk
    Good day! My strongly typed resource classes acessible via Resources.<Name of resx file> in ASP.NET MVC2 project from /App_GlobalResources are not updated anymore. I've tried to right click on them and choose "Run custom tool" and got error: Cannot find custom tool 'GlobalResourceProxyGenerator' on this system. I use VS2010 Express, project is ASP.NET MVC2 (and uses T4MVC). Thanks in advance!

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  • How much business logic belongs in RIA services layer?

    - by jkohlhepp
    I have been experimenting recently with Silverlight, RIA Services, and Entity Framework using .NET 4.0. I'm trying to figure out if that stack makes sense for use in any of my upcoming projects. It certainly seems like these technologies can be very productive for developing applications, but I'm struggling to decide how an application on top of this stack should be architected. The main issue I have is that in most of the demos I've seen most of the business logic ends up as DataAnnotations and custom validations in the RIA Services domain service class. This seems inappropriate to me. I view the domain service as basically a glorified web service that happens to make it easy to push information to the client. But most of what I've seen seems to orient the domain service as the main source of business logic in the application. So, my questions: What is the best location for business logic (rules, validations, behaviors, authorization) in an application using this stack? Are there any guidelines published at an architectural level for using this stack? My questions pertain to large, complex, and long-lived applications. Obviously for an application of only a few screens this is less of a concern. Edit: Another thing I meant to mention is that obviously you can make the domain service class stupid, but then you lose a lot of the automagic entity information (e.g. validations) being pushed to the client. And then if you lose that is there any point to using RIA services?

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  • Eclipse RCP: Actions VS Commands

    - by Dot
    Hi, What are differences between Actions and Commands in the context of Eclipse RCP? I know that they both contribute to the menu entries, but which one is better? And why? Of all the online resources I read, I could not get a firm understanding of the differences between both. I have not actually tried to use them, but just wanted to understand them to start with from higher level point of view. Thanks

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  • How to form submit and show a different page in ASP.Net MVC?

    - by melaos
    hi guys i'm new to asp.net mvc.. so basically i just build up a two page app which takes the registration information of the user and post it to the database. i use a lot of jquery and ajax calls to retrieve data from the database using linq to sql stored proc object. and currently i'm stuck at one page where after the user submits the form it should redirect him to /Home/AddProduct. What i found was the error: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. what used on my form are basically a combination of html controls, asp.net controls and some asp.net mvc type controls. i submit the form using action="/Home/ProductAdded" and after doing some googling i found i was supposed to add in the machine key but after doing so, the index page becomes unviewable. because it couldn't find the index file now. removing the action helps, but now it just doesn't go anywhere. so what am i missing here? i feel i'm missing a lot of fundamentals understanding about asp.net mvc and i don't even know how to submit a form and go to a different page here!!

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  • Mobile Video Detection

    - by aaroninfidel
    Hi, I'm using DeviceAtlas to detect mobile phones, I was wondering if anyone had some good resources in terms of standard codecs, video dimensions that are used and how you go about serving video to mobile devices. Thanks! -Aaron

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  • Wordpress "Vote It Up" plugin help

    - by Sparks Memphis
    I'm creating a dig like site with wordpress, TDO Mini forms and Vote it up where people who live in the city can log on, post their ideas of how to improve the city and have others vote. on the home page there are 2 columns. right is the TDO submit form. left are the "Most Wanted" items. the posts with the highest rating. I've found an impressive lack of information on this plugin. im not great with php but i can make do most of the time. I want to output the post title, post author, links for yes and no votes as well as have the titles in the left column list in most popular order. preferably id like the home pages to have only the top 5 or so highest rated posts. I cant find any way to output that information as i need. I was really hoping there was a simple way to call the highest rated post titles in the loop for the main page but there doesnt seem to be a way. Bout the only thing i've found is the DisplayVotes tag which isnt incredibly helpful. does anybody know how i can accomplish this, or can provide some expert advise? help would be immensely appreciated.

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  • Browser back button restores empty fields

    - by Pierre
    I have a web page x.php (in a password protected area of my web site) which has a form and a button which uses the POST method to send the form data and opens x.php#abc. This works pretty well. However, if the users decides to navigate back in Internet Explorer 7, all the fields in the original x.php get cleared and everything must be typed in again. I cannot save the posted information in a session and I am trying to understand how I can get IE7 to behave the way I want. I've searched the web and found answers which suggest that the HTTP header should contain explicit caching information. Currently, I've tried this : session_name("FOO"); session_start(); header("Pragma: public"); header("Expires: Fri, 7 Nov 2008 23:00:00 GMT"); header("Cache-Control: public, max-age=3600, must-revalidate"); header("Last-Modified: Thu, 30 Oct 2008 17:00:00 GMT"); and variations thereof. Without success. Looking at the returned headers with a tool such as WireShark shows me that Apache is indeed honouring my headers. So my question is: what am I doing wrong?

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  • Rails routes question. Always find by name and remove /class_name/ from route

    - by Hock
    I have a Category model and a Product model. Category has_many products and Product belongs_to Category I want my routes to be like this: /:category_type/:category_name/ opens Product#index /:category_type/ opens Category#show / opens Category#index Is there a way to achieve that with resources? I tried with path_prefix but I just can't get it done. Any help? Thanks, Nicolás Hock Isaza

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  • How to mock the Request.ServerVariables using MOQ for ASP.NET MVC?

    - by melaos
    hi guys, i'm just learning to put in unit testing for my asp.net mvc when i came to learn about the mock and the different frameworks there is out there now. after checking SO, i found that MOQ seems to be the easiest to pick up. as of now i'm stuck trying to mock the Request.ServerVariables, as after reading this post, i've learned that it's better to abstract them into property. as such: /// <summary> /// Return the server port /// </summary> protected string ServerPort { get { return Request.ServerVariables.Get("SERVER_PORT"); } } But i'm having a hard time learning how to properly mock this. I have a home controller ActionResult function which grabs the user server information and proceed to create a form to grab the user's information. i tried to use hanselman's mvcmockhelpers class but i'm not sure how to use it. this is what i have so far... [Test] public void Create_Redirects_To_ProductAdded_On_Success() { FakeViewEngine engine = new FakeViewEngine(); HomeController controller = new HomeController(); controller.ViewEngine = engine; MvcMockHelpers.SetFakeControllerContext(controller); controller.Create(); var results = controller.Create(); var typedResults = results as RedirectToRouteResult; Assert.AreEqual("", typedResults.RouteValues["action"], "Wrong action"); Assert.AreEqual("", typedResults.RouteValues["controller"], "Wrong controller"); } Questions: As of now i'm still getting null exception error when i'm running the test. So what am i missing here? And if i use the mvcmockhelpers class, how can i still call the request.verifyall function to ensure all the mocking are properly setup?

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  • Guessess of my session value conflicts

    - by SmartestVEGA
    I have a asp.net web form which will submit information to come as emails. Whenever user fill the form and click on submit button,the information user entered will be sent as email. This web form has 4 page. but the web form will not use all 4 page on all requests. if the user select a particular value in first page, the form will bypass the 3rd page and go the last 4th page(like...page1,2,4). IF it is any other values selected in the first page. form will navigate as page1,2,3,4. So now my problem is when multiple users access the same website, the value in the first page get combines from different users and the form will act abnormally.Sometime it will bypass sometimes it will not bypass the page3 Show below is the variable decalrations: Public strRoleType As String = String.Empty Protected Shared isAreaSelected As Integer = 0 Protected Shared isStoreSelected As Integer = 0 Protected Shared isHeadOfficeSelected As Integer = 0 Protected Shared isRegionSelected As Integer = 0 I guess the problem is with strRoleType variable whether it is getting values from different users. Do any have any work around?

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  • What's the best way to develop a debugging window for an ajax ASP.Net MVC application

    - by KallDrexx
    While developing my ASP.NET MVC, I have started to see the need for a debugging console window to assist in figuring out what is going right and wrong in my code. I read the last few chapters of the Pro Asp.net MVC book, and the author details how to use http modules to show page load/creation times and linq to sql query logs, both of which I definitely want to be able to see. However, since I am loading a lot of small sections of my page individually with ajax I don't want the debug information right there in the middle of my screen. So the idea I came up with was to have a separate browser window (open-able by a link or some javascript) with a console log, that can contain logged entries both from javascript and from the asp.net mvc run. The former should be relatively easy, but I'm having trouble coming up with a way to log the asp.net information in ajax requests. The direction I have been thinking of going is to create an httpmodule (like the Pro MVC book does), and have that module contain some that append the javascript's log to console calls with the messages. The issue I see with this is finding a way to get the log messages from the controller's action methods to the httpmodule's methods. The only way I see to do this is with a singleton, but I'm not sure if singletons are bad practice for a stateless web application. Furthermore, it seems like if I return json with my ajax calls (instead of pure html) then that won't work at all anyways and unless there is a way to add data to an existing json structure inside the httpmodule. How does everyone else handle this type of debugging in heavily ajax applications? For reference, the javascript library I am using is jquery.

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  • exception message getting lost in IIOP between glassfish domains

    - by Michael Borgwardt
    I'm running two glassfish v2 domains containing stateless session EJBs. In a few cases, an EJB in one domain has to call one in the other. My problem is that when the called EJB aborts with an exception, the caller does not receive the message of the exception and instead reports an internal error that is not helpful at all in diagnosing the problem. What happens seems to be this: At the transport layer, a org.omg.CORBA.portable.ApplicationException is created,which already loses all detail information about the exception except its class. Inside com.sun.jts.CosTransactions.TopCoordinator.get_txcontext(), the status of the transaction ass rolled back causes a org.omg.CosTransactions.Unavailable to be thrown, which gets wrapped and passed around a few times and eventually results into this error being displayed to the user: org.omg.CORBA.INVALID_TRANSACTION: vmcid: 0x0 minor code: 0 completed: No at com.sun.jts.CosTransactions.CurrentTransaction.sendingRequest(CurrentTransaction.java:807) at com.sun.jts.CosTransactions.SenderReceiver.sending_request(SenderReceiver.java:139) at com.sun.jts.pi.InterceptorImpl.send_request(InterceptorImpl.java:344) at com.sun.corba.ee.impl.interceptors.InterceptorInvoker.invokeClientInterceptorStartingPoint(InterceptorInvoker.java:271) at com.sun.corba.ee.impl.interceptors.PIHandlerImpl.invokeClientPIStartingPoint(PIHandlerImpl.java:348) at com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:284) at com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.request(CorbaClientDelegateImpl.java:184) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:186) at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152) at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(BCELStubBase.java:225) Is there anything I can do here to preserve information about the actual cause of the problem?

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  • How to get Eclipse + PyDev + App Engine + Unit testing to work?

    - by PEZ
    I want to run my unit tests for a Python Google App Engine project using Run As = Python unit-test But when I try that all my Model tests bail with the error message: BadArgumentError: app must not be empty. Anyone got this to work? NB: The tests runs fine using Nose --with-gae. But I want the PyDev integration with hyperlinking of resources and such.

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