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  • Element is already the child of another element.

    - by Erica
    I get the folowing error in my Silverlight application. But i cant figure out what control it is that is the problem. If i debug it don't break on anything in the code, it just fails in this framework callstack with only framework code. Is there any way to get more information on what part of a Silverlight app that is the problem in this case. Message: Sys.InvalidOperationException: ManagedRuntimeError error #4004 in control 'Xaml1': System.InvalidOperationException: Element is already the child of another element. at MS.Internal.XcpImports.CheckHResult(UInt32 hr) at MS.Internal.XcpImports.Collection_AddValue[T](PresentationFrameworkCollection1 collection, CValue value) at MS.Internal.XcpImports.Collection_AddDependencyObject[T](PresentationFrameworkCollection1 collection, DependencyObject value) at System.Windows.PresentationFrameworkCollection1.AddDependencyObject(DependencyObject value) at System.Windows.Controls.UIElementCollection.AddInternal(UIElement value) at System.Windows.PresentationFrameworkCollection1.Add(T value) at System.Windows.Controls.AutoCompleteBox.OnApplyTemplate() at System.Windows.FrameworkElement.OnApplyTemplate(IntPtr nativeTarget)

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  • Pure C# open source PCM to Ogg convertor?

    - by Ole Jak
    Microsoft Silverlight 4 is in beta. It supports PCM audio output. It would be madness to stream PCM over internet (for ex in P2P chart webApp) so we need Pure C# open source PCM to Ogg convertor. No unmanaged code, nothing going out of .net sandbox. So does any one know such Pure C# open source PCM to Ogg convertor? What do I need: Open Source Libs for encoding. Tutorials and blog articles on How to do it, about etc. BTW: why Pure C#? - because Silverlight 4 does not support unmanaged or just not C# DLL's. BTW2: this question is similar to this one but it is different because Ogg is Open Source, free while mp3 will not be free until 2010

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  • Blacklight Expander problem while expanding programmatically

    - by David Brunelle
    Hi, I am doing a silverlight project in Silverlight 4 and I included the BlackLight project in my project so that I could use their new controls, especialy the dockpanel and the autoexpander, which is causing me at the moment some little problems. What I would like to do is to have several auto-expander that will expand or collapsed when I click on button. In my case more specifically, each auto-expander have a set of parameter to fill, which in turn will fill the other expander and the current one would collaps and the just filled one would expand. The idea is simple, yet when I use a button which is on one of my expander, it only works once... It would expand/collapse the first time, then after that, nothing. I trace the code and it seems to go through just fine, but the property value won't change Here is my code Private Sub BtnExpand_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles BtnExpand.Click ClientExpander.IsExpanded = False ProjetExpander.IsExpanded = True End Sub Could it be a known bug, or must I reset some flags to make it work? Thanks.

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  • Can I ran 2 or more Tcp Sever applications on one computer?

    - by Samvel Siradeghyan
    Hi all. I have a client-server Silverlight application, which is use Socets. I have server appliaction on may computer(Win Form application) and client applucation as web site(Silverlight application). I use policy server which open port 943. Everything works fine on this application. But now I need to write another client-server application. Server for that application olso use port 943 for policy connection. When I try to run this 2 server applications on the same compyeter an excepten is thrown which says that only one application can work on port 943. How can I solve this problem? Thanks.

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  • Converting old WCF service to RIA one

    - by Artur
    Hi there, Currently I have a service that looks like: Some app <-- WCF Service <-- Business Logic <-- Entity Framework Model <-- SQL Database One of "some app" would be Silverlight, but there as well will be lots of other clients (mainly mobile devices). To me the greatest benefit of having RIA services is possibility of making ordinary (not asynchronous) calls from Silverlight. I wondered if there is an easy way of converting what I have so far to be a RIA service? I as well wonder if there is a point of doing so if I plan to use the same service for multiple platforms/clients? Any help/links would be greatly appreciated.

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  • TeamCity for continuous integration with Visual Studio 2010 solutions/projects

    - by JeffryEngberg
    I am running TeamCity build 5.1.1 on a virtual machine that also hosts our SVN environment. A team I support has recently made the move from Visual Studio 2008/Silverlight 3.0 to Visual Studio 2010/Silverlight 4.0 and when investigating how to do continuous integration with Visual Studio 2010 solutions/projects, it is not as cut and dried as it appeared to be in Visual Studio 2008. Previously I was using Web Deployment Projects and targeting different Release Configurations in TeamCity, which would use the Web Deployment Project to package/deploy the code to our various environments. However when checking out the new Publish ability in Visual Studio 2010 I cannot find a way to specify which location to deploy to. Does everything need to be done in MSBuild now (in the solution file or maybe the Web project file?). If anyone has any examples of how they've done Continuous Integration using TeamCity and Visual Studio 2010, it would be greatly appreciated as I am coming up blank at the moment.

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  • Polling duplex does not scale... what's the alternative?

    - by user80855
    Our tests showed that the polling duplex binding simply does not scale and can not be used on a service within a web-farm or even a web garden. We have looked at TCP/IP sockets for a client push method, but the firewall issue is does allow us to use sockets. I was wondering what is the alternative "free" solution to this problem? allowing us to scale and allowing us to push data to client... I have also tried the solution in this article http://tomasz.janczuk.org/2009/09/scale-out-of-silverlight-http-polling.html but at the end, there was too much polling on a database, and performance was affected. Our Silverlight application need a pub/sub design, but it needs to be reliable and scalable... any ideas?

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  • A bunch of SharePoint 2010 Videos

    - by Sahil Malik
    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). DNRTV – Developing for SharePoint 2010 Talks about LINQ to SharePoint, and a basic intro of the dev tools. watch Telerik Silverlight Chart showing live data from SharePoint 2010. This video demonstrates the usage of a custom WCF service and a custom silverlight frontend. watch. Telerik Silverlight Grid with BCS Lists in SharePoint 2010 This video demonstrates BCS + Client Object Model + A silverlight front end. watch Telerik R.A.D Calendar shown working with an OOTB Calendar list watch Large file upload in SP using Silverlight. watch Silverlight coverflow implemented on a picture library watch Integrating Yahoo Geocoding API, Bing maps, and Bing search engine in a Silverlight UI in SharePoint watch SharePoint 2010 scalability, RBS, and related stuff. watch SharePoint 2007 and Silverlight – talks about TDD etc. watch Comment on the article ....

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  • imported function name is not visible in entities context

    - by ali moharrami
    hi I am working on silverlight application which uses EF. I am able to retrieve the data. But I want to execute a stored procedure which returns no value. I tried using Import function. and the function is created in DataModel.Designer.cs : public int ClearWorkflow(Nullable<global::System.Guid> processId) { ObjectParameter processIdParameter; if (processId.HasValue) { processIdParameter = new ObjectParameter("ProcessId", processId); } else { processIdParameter = new ObjectParameter("ProcessId",typeof(global::System.Guid)); } return base.ExecuteFunction("ClearWorkflow", processIdParameter); } But the function name is not visible in entities context while accessing in silverlight.

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  • How can I pass a mouse click to a parent control?

    - by grimus
    In a Silverlight 2 app, I am using Rectangles on a Canvas to draw a representation of data. I would like to have mouse clicks on the Rectangles be passed on to the control that owns the Canvas. I would also like to be able to show a tooltip with a summary of the data when the mouse is over a Rectangle. So far I've only been able to achieve one item or the other. If I make the Rectangles have their IsHitTestVisible property = false, the tooltips don't work, but the owning control will receive the mouse clicks. If I set it to true, then tooltips do work, but the clicks don't get passed on. Is there a way to have a Silverlight item be IsHitTestvisible = true, and pass on the mouse clicks?

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  • What can be done to speed up synchronous WCF calls?

    - by Dimitri C.
    My performance measurements of synchronous WCF calls from within a Silverlight application showed I can make 7 calls/s on a localhost connection, which is very slow. Can this be speeded up, or is this normal? This is my test code: const UInt32 nrCalls = 100; ICalculator calculator = new CalculatorClient(); // took over from the MSDN calculator example for (double i = 0; i < nrCalls; ++i) { var call = calculator.BeginSubtract(i + 1, 1, null, null); call.AsyncWaitHandle.WaitOne(); double result = calculator.EndSubtract(call); } Remarks: CPU load is almost 0%. Apparently, the WCF module is waiting for something. I tested this both on Firefox 3.6 and Internet Explorer 7. I'm using Silverlight v3.0

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  • How to measure a canvas that has auto height and with

    - by Wymmeroo
    Hi Folks, I'm a beginner in silverlight so i hope i can get an answer that brings me some more light in the measure process of silverlight. I found an interessting flap out control from silverlight slide control and now I try to use it in my project. So that the slide out is working proper, I have to place the user control on a canvas. The user control then uses for itself the height of its content. I just wanna change that behavior so that the height is set to the available space from the parent canvas. You see the uxBorder where the height is set. How can I measure the actual height and set it to the border? I tried it with Height={Binding ElementName=notificationCanvas, Path=ActualHeight} but this dependency property has no callback, so the actualHeight is never set. What I want to achieve is a usercontrol like the tweetboard per example on Jesse Liberty's blog Sorry for my English writing, I hope you understand my question. <Canvas x:Name="notificationCanvas" Background="Red"> <SlideEffectEx:SimpleSlideControl GripWidth="20" GripTitle="Task" GripHeight="100"> <Border x:Name="uxBorder" BorderThickness="2" CornerRadius="5" BorderBrush="DarkGray" Background="DarkGray" Padding="5" Width="300" Height="700" > <StackPanel> <TextBlock Text="Tasks"></TextBlock> <Button x:Name="btn1" Margin="5" Content="{Binding ElementName=MainBorder, Path=Height}"></Button> <Button x:Name="btn2" Margin="5" Content="Second Button"></Button> <Button x:Name="btn3" Margin="5" Content="Third Button"></Button> <Button x:Name="btn1_Copy" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy1" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy2" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy3" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy4" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy5" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy6" Margin="5" Content="First Button"/> </StackPanel> </Border> </SlideEffectEx:SimpleSlideControl>

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  • C# - Convert Implict Type to ObservableCollection

    - by user70192
    Hello, I have a LINQ statement that returns an implicit type. I need to get this type to be an ObservableCollection in my Silverlight 3 application. The ObservableCollection constructor in Silverlight 3 only provides an empty constructor. Because of this, I cannot directly convert my results to an ObservableCollection. Here is my code: ObservableCollection<MyTasks> visibleTasks = e.Result; var filteredResults = from visibleTask in visibleTasks select visibleTask; filteredResults = filteredResults.Where(p => p.DueDate == DateTime.Today); visibleTasks = filteredResults.ToList(); // This throws a compile time error How can I go from an implicitly typed variable to an observable collection? Thank you

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  • Is there a path of least resistance that a newcomer to graphics-technology-adoption can take at this point in the .NET graphics world?

    - by Rao
    For the past 5 months or so, I've spent time learning C# using Andrew Troelsen's book and getting familiar with stuff in the .NET 4 stack... bits of ADO.NET, EF4 and a pinch of WCF to taste. I'm really interested in graphics development (not for games though), which is why I chose to go the .NET route when I decided choose from either Java or .NET to learn... since I heard about WPF and saw some sexy screenshots and all. I'm even almost done with the 4 WPF chapters in Troelsen's book. Now, all of a sudden I saw some post on a forum about how "WPF was dead" in the face of something called Silverlight. I searched more and saw all the confusion going on at present... even stuff like "Silverlight is dead too!" wrt HTML5. From what I gather, we are in a delicate period of time that will eventually decide which technology will stabilize, right? Even so, as someone new moving into UI & graphics development via .NET, I wish I could get some guidance from people more experienced people. Maybe I'm reading too much? Maybe I have missed some pieces of information? Maybe a path exists that minimizes tears of blood? In any case, here is a sample vomiting of my thoughts on which I'd appreciate some clarification or assurance or spanking: My present interest lies in desktop development. But on graduating from college, I wish to market myself as a .NET developer. The industry seems to be drooling for web stuff. Can Silverlight do both equally well? (I see on searches that SL works "out of browser"). I have two fair-sized hobby projects planned that will have hawt UIs with lots of drag n drop, sliding animations etc. These are intended to be desktop apps that will use reflection, database stuff using EF4, networking over LAN, reading-writing of files... does this affect which graphics technology can be used? At some laaaater point, if I become interested in doing a bit of 3D stuff in .NET, will that affect which technologies can be used? Or what if I look up to the heavens, stick out my middle finger, and do something crazy like go learn HTML5 even though my knowledge of it can be encapsulated in 2 sentences? Sorry I seem confused so much, I just want to know if there's a path of least resistance that a newcomer to graphics-technology-adoption can take at this point in the graphics world.

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  • Client-side framework for web-app with good audio support

    - by Poita_
    I'm trying to create a client-side web app that generates music procedurally using some user-input parameters, so I'm looking for a framework (e.g. Flash, Silverlight etc.) that has the capability to play audio at a specified pitch. Whether it is playing a WAV/MP3 file, using MIDI output, or just playing beeps doesn't really matter -- I just need something that will enable me to generate arbitrary music client-side. I've done a bit of searching and it appears that Flash might have the ability to change pitch with the help of a third-part plugin, but I couldn't find anything similar for Silverlight. I can go a try all them out manually if need be, but I thought I'd ask here first just in case anyone had tried something like this before. Thanks in advance

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  • Develop an classic UI or be bold with a newer design?

    - by DeanMc
    Forgive me if this is the wrong place but I am curious as to how other programmers feel about this topic: I am currently working on my portfolio site, it is being designed and built in silverlight 4. I initially started off with a typical stylised e-folio theme much like a standard website in terms of layout and flow. As I work more in the concept stages something has struck me. Am I trying to shoe-horn yesterday into today? What I am talking about is UI expectations. I'm all for clean user interfaces but that does not mean they should not take advantage of new concepts in presentation right? If you where to develop a site in silverlight as your own portfolio piece would you stick to the tried and tested "website" feel or would you try to come up with a UI that is intuitive and complements the technology? I feel that UI discussions are all the more important now that all forms of web development are allowing better methods to engage the user.

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  • Security Exception while running sites using subdomain?

    - by lmenaria
    I have 3 sites : media.lmenaria.com - Hosting Images webservice.lmenaria.com - Sending images url from database. www.lmenaria.com - Host Silverlight application and display images. When I run page "http://www.lmenaria.com/silverlight.aspx". I am getting below exception. So what shpould I do ? System.Security.SecurityException: Security error. at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) at System.Net.Browser.BrowserHttpWebRequest.<c_DisplayClass5.b_4(Object sendState) at System.Net.Browser.AsyncHelper.<c_DisplayClass2.b_0(Object sendState) at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) at System.Net.WebClient.GetWebResponse(WebRequest request, IAsyncResult result) at System.Net.WebClient.OpenReadAsyncCallback(IAsyncResult result) I think, my all sites runing at same domain, so I don't need crossdomain xmls. Please let me know how Can I fix it. I have tried to put corssdoamin xml media.lmenaria.com,webservice.lmenaria.com both, and working fine, but only at www.lmenaria.com not working. We are downloading images using WebClient. Thanks in advance, Laxmilal Menaria

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  • How to measure a canvas that has auto height and width

    - by Wymmeroo
    Hi Folks, I'm a beginner in silverlight so i hope i can get an answer that brings me some more light in the measure process of silverlight. I found an interessting flap out control from silverlight slide control and now I try to use it in my project. So that the slide out is working proper, I have to place the user control on a canvas. The user control then uses for itself the height of its content. I just wanna change that behavior so that the height is set to the available space from the parent canvas. You see the uxBorder where the height is set. How can I measure the actual height and set it to the border? I tried it with Height={Binding ElementName=notificationCanvas, Path=ActualHeight} but this dependency property has no callback, so the actualHeight is never set. What I want to achieve is a usercontrol like the tweetboard per example on Jesse Liberty's blog Sorry for my English writing, I hope you understand my question. <Canvas x:Name="notificationCanvas" Background="Red"> <SlideEffectEx:SimpleSlideControl GripWidth="20" GripTitle="Task" GripHeight="100"> <Border x:Name="uxBorder" BorderThickness="2" CornerRadius="5" BorderBrush="DarkGray" Background="DarkGray" Padding="5" Width="300" Height="700" > <StackPanel> <TextBlock Text="Tasks"></TextBlock> <Button x:Name="btn1" Margin="5" Content="{Binding ElementName=MainBorder, Path=Height}"></Button> <Button x:Name="btn2" Margin="5" Content="Second Button"></Button> <Button x:Name="btn3" Margin="5" Content="Third Button"></Button> <Button x:Name="btn1_Copy" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy1" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy2" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy3" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy4" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy5" Margin="5" Content="First Button"/> <Button x:Name="btn1_Copy6" Margin="5" Content="First Button"/> </StackPanel> </Border> </SlideEffectEx:SimpleSlideControl>

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  • How would MVVM be for games?

    - by Benny Jobigan
    Particularly for 2d games, and particularly silverlight/wpf games. If you think about it, you can divide a game object into its view (the graphic on the screen) and a view-model/model (the state, ai, and other data for the object). In silverlight, it seems common to make each object a user control, putting the model and view into a single object. I suppose the advantage of this is simplicity. But, perhaps it's less clean or has some disadvantages in terms of the underlying "game engine". What are your thoughts on this matter? What are some advantages and disadvantages of using the MVVM pattern for game development? How about performance? All thoughts are welcome.

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  • W3C Web Content Accessibility Guidelines 1.0, which technology could I use?

    - by vtortola
    Hi, I've a project where one of the requirements is fullfil the "W3C Web Content Accessibility Guidelines 1.0 (WCAG 1.0)". I'm now considering wich technology could I use to acomplish it, but I'm a little bit confused. Silverlight would be the easiest way, but I cannot find conclusive information about if silverlight is or isn't compilant. I've seen controls pack done in javascript that looks very nice, like DHTMLX, but again the same problem, I don't know for sure. Besides, I've always read that a website should work wihthout javascript, and use it just for improve the user experience. Thanks.

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  • Dynamically setting WCF endpoint

    - by Matt
    Ive just started using WCF with silverlight and its working fine. But one thing that is bugging me is the address of the .svc. Why is it statically set in the .config? Would it be possible to set it when creating an instance of the proxy class? And if so, is there a way to set it to the current address? Our software will be deployed on many different domain and we cant change the config every time. The svc will always be in the same domain as the silverlight page. Thanks.

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