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• Silverlight Canvas doesn't support KeyDown?

  - by chakrit

  I have this: <Canvas x:Name="LayoutRoot" KeyDown="LayoutRoot_KeyDown"> </Canvas> In a newly-minted Ag 3 application in VS2008. I simply changed the default <Grid /> to <Canvas /> and added a KeyDown handler that pops a MessageBox. But no matter how I tried, the KeyDown event just would never, ever fires. Is it simply that <Canvas /> doesn't support KeyDown or am I doing something wrong?

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• Does Visual Studio Localhost ASP.NET debugging allow caching?

  - by Joel

  The title pretty much says it all, but here's the issue. I have an generic handler that returns Javascript; the only line of code that deals with caching that I put in is the following: context.Response.Cache.SetCacheability(HttpCacheability.Public); context.Response.Cache.SetExpires(DateTime.Now.AddYears(1)); context.Response.ContentType = "text/javascript"; context.Response.Write("result"); I'm debugging on localhost. out of Visual Studio 2008, (that's "localhost." so fiddler picks it up) and Fiddler2 sees the expire date, but says that the cache header is set to private, and the page isn't being cached. Can anybody see what's going wrong here?

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• Web.config Encryption Error

  - by BKarms

  Having problem with encryption. I gave full permissions to all users to RSA folders. I did C:\>aspnet_regiis -pe "appSettings" -location "web.config" -prov "RsaProtectedCo nfigurationProvider" Encrypting configuration section... An error occurred executing the configuration section handler for appSettings. Failed to encrypt the section 'appSettings' using provider 'RsaProtectedConfigur ationProvider'. Error message from the provider: Object already exists. Failed! Then I did C:\>aspnet_regiis -pa "NetFrameworkConfigurationKey" "administrator" Adding ACL for access to the RSA Key container... The RSA key container was not found. Failed! Followed by C:\>aspnet_regiis -pc "NetFrameworkConfigurationKey" -exp Creating RSA Key container... The RSA key container could not be opened. Failed! Nothing is working for me. Can anyone help? Thanks

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• Why `#import("dart:unittest")` can't run?

  - by Freewind

  I write some dart test code: #import("dart:unittest"); main() { test('this is a test', () { int x = 2+3; expect(x).equals(5); }); } It doesn't display any error in dart editor, but when I press the "run" button, it reports: Do not know how to load 'dart:unittest''file:///home/freewind/dev/dart/editor /samples/shuzu.org/test/model_test.dart': Error: line 1 pos 1: library handler failed #import("dart:unittest"); ^ I see there is a "dart:unittest" library in my dart-sdk. Why it can't be run?

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• Throwing an exception from a BackgroundWorker which calls an async. method (Webrequest)

  - by mrbamboo

  Hi, My main application creates a new BackgroundWorker X the DoWork event handler of X calls a method Y of my controller. This method creates the WebRequest (async.) instance and the callback using AsyncCallback. When the response arrives the callback method Z gets called and the content will be analyzed. It can happen that the response has an unwanted content. At that moment callback Z will throw an exception. I want to catch this exception in my main application. I tried it in DoWork and RunWorkerCompleted but nothing can be caught from there. Error in RunWorkerCompletedEventArgs is always null.

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• Keep an object for the time the connection is running in ASP.NET

  - by vtortola

  Hi, I'm developing a web service with ASP.NET, is not an .asmx or WCF, it's a custom one, so I'm working with the Http classes (context, request, response, etc..). Session is disabled. I'm working with my own handler and module. I'd like to keep a object alive and accessible for the time the connection is alive. I mean, a request enters, I assign a DbCommand to it and that connection will use that command as long is doing things, when that connection is ended, the object should be disposed. I've thought, that I can add it to my IPrincipal implementation, then when the connection is authenticated in the module and the user retrieved, I can add that DbCommand to the IPrincipal, so I can retrieve it from wherever I want in the code, and after in the module EndRequest event, I can dispose it, but I don't know if there is a better approach to do this. What do you think? cheers

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• WPF DataGrid: How to get Converter

  - by Nike

  I create DataGrid Columns with Binding (where i is a Int value): dataGrid.Columns.Add(new DataGridTextColumn { Header = i.ToString(), Binding = CreateBinding(i), }); private Binding CreateBinding(int num) { Binding bind = new Binding(string.Format("[{0}]", num)); bind.Converter = new CellValueConverter(); return bind; } In the CreateBinding method I have an access to bind.Converter property. I need to call Converter.Convert() method in some handler, but there is no Converter property when I try to access it: (dataGrid.Columns[clm] as DataGridTextColumn).Binding."no Converter property!" How can I get my CellValueConverter which was created for particular Column?

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• STAThread and Process output capture in c#

  - by alex

  Hi: This is a strange problem I encountered. I have an window application written in c# to do testing. It has a MDI parent form that is hosting a few children forms. One of the forms launch test cripts by creating processes and capture the scripts output to a text box. Another form open serial port and monitoring the status of the device I am working on(like a shell). If I ran both of them together, the output of the script seems only appear in the text box after the test is done. However, If I don't open the serial port form, the output of the script is captured in real time. Does anyone knows what's causing the problem? I notice the onDataReceived even handler for serial port form has a [STAThread] header to it. Will this cause the serial port thread having higher priority than other processes? Thanks in advance.

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• Working with DataBinding and Page_Load in ASP.NET MVP

  - by Joel

  I'm using WebForms MVP to create some simple reporting applications. Most of these applications consist of a few search criteria inputs and a ComponentArt datagrid that I'm populating with data from the database. Most of the markup is in a UserControl, which is in a content page with a master page. My problem is that the control's Page_Load event is firing before the control events that caused the postback in the first place. Basically, the user clicks the search button, and Page_Load is fired BEFORE Search_Click. This is messing with the databinding scheme I've been using. So that's the question: Why is my Page_Load event firing before the event handler, and what can I do about it? I don't THINK this problem is related to WebForms MVP or ComponentArt, but obviously I could be wrong. Thanks.

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• Why can event handlers can only be bound to HttpApplication events during IHttpModule initialization

  - by Venemo

  This is just another "working in dev server, why not working in IIS" type question. So, I created a nice DAL using NHibernate as described here. When creating an ISession, I hook up an event handler to the HttpApplication.EndRequest to take care of cleaning it up. However, I deployed my site to IIS and it says: Event handlers can only be bound to HttpApplication events during IHttpModule initialization. Since when? What for? Why? How can I bypass it?

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• MouseLeftButtonUpEvent & Bubbling in Canvas

  - by Maxim

  Hi guys, I think I'm going crazy... I have Canvas with event handlers for MouseMove & MouseLeftButtonUp. However MouseLeftButtonUp is not being fired when it happens with cursor over TextBlock that is inside canvas. (it fires just fine when I release mouse button in empty space of the canvas) I tried attaching handler via AddHandler and using regular += syntax, nothing seems to work. I tried using Canvas.CaptureMouse() but it doesnt seem to work either (CaptureMouse returns true btw). MouseLeftButtonUp just doesnt want to propagate to it's parent when it happens over TextBlock (or any other element with IsHitTestVisible = true) inside Canvas. Please help.

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• Visual Studio 2008 built-in web server needs integrated pipeline mode - How?

  - by jdk

  Using Visual Studio 2008 and built-in web server. In a Web Handler .ashx file public void ProcessRequest(HttpContext context) { context.Response.ContentType = MimeType_text_xvcard; context.Response.Headers.Add(HttpHeader_ContentLength, "2138"); when I try to add an HTTP header I get the exception: This operation requires IIS integrated pipeline mode. 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.PlatformNotSupportedException: This operation requires IIS integrated pipeline mode. I can find information about this error on the Internet but need specific info about how to presumably enable Integrated Pipeline mode (through web.config?) to allow HTTP headers to be manipulated. How do do I put the built-in web server into integrated pipeline mode? Note: Not using full-fledged IIS

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• HttpError 502 with Google Wave Active Robot API

  - by Drew LeSueur

  I am trying to use the Google Wave Active Robot API and I get an HTTP 502 error example from waveapi import events from waveapi import robot from waveapi import ops import passwords robot = robot.Robot('gae-run', 'http://a3.twimg.com/profile_images/250985893/twitter_pic_bigger.jpg') robot.setup_oauth(passwords.CONSUMER_KEY, passwords.CONSUMER_SECRET, server_rpc_base='http://www-opensocial.googleusercontent.com/api/rpc') wavelet = robot.fetch_wavelet('googlewave.com!w+dtuZi6t3C','googlewave.com!conv+root') robot.submit(wavelet) self.response.out.write(wavelet.creator) But the error I get is this: Traceback (most recent call last): File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 511, in __call__ handler.get(*groups) File "/base/data/home/apps/clstff/gae-run.342467577023864664/main.py", line 23, in get robot.submit(wavelet) File "/base/data/home/apps/clstff/gae-run.342467577023864664/waveapi/robot.py", line 486, in submit res = self.make_rpc(pending) File "/base/data/home/apps/clstff/gae-run.342467577023864664/waveapi/robot.py", line 251, in make_rpc raise IOError('HttpError ' + str(code)) IOError: HttpError 502 Any ideas?

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• How do I stop IIS7 from putting out its own 404 before my MVC app gets a chance to handle it?

  - by Gary McGill

  I have an ASP.NET MVC 2 application, which has an Application_Error event handler in global.asax. In this, I'm detecting the case where the Exception type is HttpException and the HTTP code is 404, and redirecting to my own 404-handling page. This works fine on my Cassini development server, but now I'm trying to move it over to my production server which has IIS7. When I request a non-existent URL, IIS7 is showing its own 404 page, and so far as I can tell, my Application_Error method is never called. How do I fix that?

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• BLOB Reading via IHttpAsyncHandler

  - by shaniirfan

  Hi, I am storing images in SQL Server 2000 database (BLOB type). There is a web page in my ASP.NET application which need to show a lot images to the end user and i want to handle browser's requests for images through a IHttpAsyncHandler. I found a similer post on codeproject "Asynchronous HTTP Handler for Asynchronous BLOB DataReader." But for some reasons, page get freeze upon completion of "BeginProcessRequest" method and "EndProcessRequest" method never get call. Can anyone look at this post and let me know whats wrong in that post? OR what i need to do to complete this task (BLOB Reading via IHttpAsyncHandler)?

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• Need to access the Page object in Global.asax in the PreRequestHandlerExecute

  - by Taher

  I have a huge website (containing around 5000+) pages. There is a theme functionality in the website where user can choose different colors for their profile. Now i want to use the ASP.net theme feature and put different CSS (for different colors) in the theme folder and in Global.asax i want check the user theme and render appropriate link element with the css. But my problem is, i am not able to access the Page element for adding the link in the page. Here is my code Dim page As System.Web.UI.Page = TryCast(System.Web.HttpContext.Current.Handler,System.Web.UI.Page) page.StyleSheetTheme = "Black" But when i run this code I get a Null reference error. P.s : My application is very huge so its not possible to have a master page or a base class and inherit it in every page. Please suggest.

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• How to "chain" modal dialogs in YUI 2 ?

  - by giulio

  I have a modal dialog box presented in Yahoo UI. The user selects a value from dialog "A", and then I want to present another modal dialog box to collect some more data in dialog "B". I have been using the YAHOO.widget.Dialog successfully. The problem seems to be that you can't initiate dialog window "B" from the handler function of dialog "A". So, how can you programmatically launch a second dialog window after the user hits the "OK" button on the first ? (I had tried to create an additional Listener for a field that is updated in dialog "A" to trigger dialog "B" but this doesn't work either.) Thanks..

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• Augmented reality problem with multiple webs ervice.

  - by sujitjitu

  Hi, i am working on an Augmented Reality application.I am using android platform. i am retrieving data by using Handler concept from web service to show it above the camera preview. But my problem is that when i am making one web service call it is working fine but with multiple web service call the camera is getting crashed.It is working fine in the emulator but not working in the real device. I don't know what is the problem. I have tried everything not got the solution yet. Please help me its urgent. Thanks in advance..........

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• ASP.Net GridView GridViewDeleteEventArgs.Keys empty

  - by the berserker

  I have following Gridview: <asp:GridView ID="GridView1" runat="server" CssClass="table" DataKeyNames="groupId" DataSource="<%# dsUserGroupsSelected %>" DataMember="Group" etc....> and after firing RowDeleting event handler: protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) e.Keys is empty. Moreover, in runtime if I check dsUserGroupsSelected.Group.PrimaryKey it is poulated with: {System.Data.DataColumn[1]} [0]: {groupId} so it's really odd to me. Am I missing something? I have this kind of a workaround: int groupId = (int)GridView1.DataKeys[e.RowIndex].Value; which will work just fine, but I just can't get it why e.Keys (and e.Values) would be empty!? Any ideas?

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• Synchronizing scroll positions for 2 WPF DataGrids

  - by Philipp Schmid

  I am trying to synchronize the horizontal scroll position of 2 WPF DataGrid controls. I am subscribing to the ScrollChanged event of the first DataGrid: <toolkit:DataGrid x:Name="SourceGrid" ScrollViewer.ScrollChanged="SourceGrid_ScrollChanged"> I have a second DataGrid: <toolkit:DataGrid x:Name="TargetGrid"> In the event handler I was attempting to use the IScrollInfo.SetHorizontalOffset, but alas, DataGrid doesn't expose IScrollInfo: private void SourceGrid_ScrollChanged(object sender, ScrollChangedEventArgs e) { ((IScrollInfo)TargetGrid).SetHorizontalOffset(e.HorizontalOffset); // cast to IScrollInfo fails } Is there another way to accomplish this? Or is there another element on TargetGrid that exposes the necessary IScrollInfo to achieve the synchronization of the scroll positions? BTW, I am using frozen columns, so I cannot wrap both DataGrid controls with ScrollViewers.

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• HTML - How do I know when all frames are loaded?

  - by Yuval Peled

  I'm using .NET WebBrowser control. How do I know when a web page is fully loaded? I want to know when the browser is not fetching any more data. (The moment when IE writes 'Done' in its status bar...). Notes: The DocumentComplete/NavigateComplete events might occur multiple times for a web site containing multiple frames. The browser ready state doesn't solve the problem either. I have tried checking the number of frames in the frame collection and then count the number of times I get DocumentComplete event but this doesn't work either. this.WebBrowser.IsBusy doesn't work either. It is always 'false' when checking it in the Document Complete handler.

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• How to recover gracefully from a C# udp socket exception

  - by Gearoid Murphy

  Context: I'm porting a linux perl app to C#, the server listens on a udp port and maintains multiple concurrent dialogs with remote clients via a single udp socket. During testing, I send out high volumes of packets to the udp server, randomly restarting the clients to observe the server registering the new connections. The problem is this: when I kill a udp client, there may still be data on the server destined for that client. When the server tries to send this data, it gets an icmp "no service available" message back and consequently an exception occurs on the socket. I cannot reuse this socket, when I try to associate a C# async handler with the socket, it complains about the exception, so I have to close and reopen the udp socket on the server port. Is this the only way around this problem?, surely there's some way of "fixing" the udp socket, as technically, UDP sockets shouldn't be aware of the status of a remote socket? Any help or pointers would be much appreciated. Thanks.

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• HTTP Error 500.19 - Internal Server Error

  - by peacmaker

  i am trying to add an website to iis 7 put when i try to run the website its gives the following error: HTTP Error 500.19 - Internal Server Error Module IIS Web Core Notification BeginRequest Handler Not yet determined Error Code 0x80070021 Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false". Config File \\?\E:\Code\web\xSP\xSP Protocol\web.config Requested URL http://localhost:80/ Physical Path E:\Code\web\xSP\xSP Protocol Logon Method Not yet determined Logon User Not yet determined Config Source 136: </modules> 137: <handlers> 138: <remove name="WebServiceHandlerFactory-Integrated"/> please any help ?

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• How to create a custom yaml config file in Symfony

  - by Guillaume Flandre

  What I want to do is quite simple: store data in a custom config file that I want to read later on. I created my file something.yml that I put in the global config directory. It looks like that: prod: test: ok dev: test: ko all: foo: bar john: doe Then I copied the config_handlers.yml and also put it in the config directory and added the following at the top of the file: config/something.yml: class: sfDefineEnvironmentConfigHandler param: prefix: something_ But if I'm calling sfConfig::get("something_foo"); I keep getting NULL. What did I do wrong? I just want to read values, so no need to create a custome config handler, right? I've read the doc here: http://www.symfony-project.org/book/1_2/19-Mastering-Symfony-s-Configuration-Files even though I'm running 1.4 (I don't think that changed since then). Edit: Of course I can use sfYaml::load() but I'd like to do things in a better way.

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• Passing Custom event arguments to timer_TICK event

  - by Nimesh

  I have class //Create GroupFieldArgs as an EventArgs public class GroupFieldArgs : EventArgs { private string groupName = string.Empty; private int aggregateValue = 0; //Get the fieldName public string GroupName { set { groupName = value; } get { return groupName; } } //Get the aggregate value public int AggregateValue { set { aggregateValue = value; } get { return aggregateValue; } } } I have another class that creates a event handler public class Groupby { public event EventHandler eh; } Finally I have Timer on my form that has Timer_TICK event. I want to pass GroupFieldArgs in Timer_TICK event. What is the best way to do it?

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