silverlight-3.0

A common technical decision nowadays is whether to build a ClickOnce rich client application or a web application. Here I'm focussing primarily on choosing between a WPF application or a Silverlight application. The chief benefit of Silverlight is obvious - it can be hosted in a browser. But, if a programmer used to WPF was to start programing in Silverlight, what would he/she suddenly find is not possible or much harder? Items can be of the following: You just cannot do it, period You can do it, but only sort of, with lots of caveats You can do it, but there's a lot more hoops to jump through

When using .NET RIA Services and MVVM in Silverlight 3.0 is there a difference between the Metadata type from RIA Services and the ViewModel from the MVVM pattern? Are these the same thing or should they be keep separate? The metadata type is a sealed internal class to the partial Entity class. There doesn't seem to be a proper separation there but the metadata type can also be decorated with attributes for Validation which makes it look like a ViewModel. I've searched around but I didn't see anything that talks about this in any detail. Agree with ChuckJ - generally the DomainContext forms

I am trying to set the Canvas properties in an ItemsControl DataTemplate with Silverlight 3. According to this post , the only way of doing that is to set it using the ItemsContainerStyle for the ContentPresenter type, since the Canvas properties only take effect on direct children of the Canvas. This doesn't seem to work in SL3, since the ItemsControl doesn't have an ItemsContainerStyle property, so I tried a ListBox as advised by this article , but it still doesn't work. From the XAML below, I would expect to see a green square, with the numbers 10, 30, 50, 70 cascading from "NW" to "SE"

In my Silverlight application I have Canvas control in ScrollViewer and lot of controls in Canvas. If canvas is too long I can use scrollviewer to see all content. But I also wont to show for client in which part of canvas is he now like in photoshop. I wont to do that be saveing canvas as image and than shoing image on left top corner with red rectangle on veweing part. Is it possible to save canvas as image? If yes how to do that and if now is there any other solutions? Thanks. try this var img = new WriteableBitmap(myCanvas, null); 来源： https://stackoverflow.com/questions/4086550/how-save

I've been trying to run the Silverlight Business Application template but it fails when I try to register. I have SQL Express with an MSSQLSERVER instance and I've defined the standard aspnetdb created. The error is: Submit operation failed. Unable to connect to SQL server database. at System.Web.DomainServices.ReflectionDomainServiceDescriptionProvider.ReflectionDomainOperationEntry.Invoke(DomainService domainService, Object[] parameters) at System.Web.DomainServices.DomainService.InvokeDomainOperationEntry(DomainOperationEntry domainOperationEntry, Object[] parameters, ChangeSetEntry