Using UserControl as ItemTemplate with ItemsControl cause AccessViolationException

03-25-2008 11:03 AM |

Hello,
Here's a simple scenario that fails in silverlight 2.0 beta 1 :

• Create a UserControl, MyUC, with for exemple only a TextBlock with the Text "TPL" (inside the existing Grid).
• In your main xaml (Page.xaml) add an ItemsControl and define the ItemTemplate as a DataTemplate containing only one instance of MyUC, you don't have to add binding.
• In Page_Load, assign the ItemSource to "new string[] {"1", "2"};" for exemple.
• Load the page and you got an AccessViolationException.

I've got a working solution showing the bug if needed.

Of course, if i copy/paste the content on MyUC to the ItemTemplate there is no problem. No problem also if i declare a DataTemplate as a resource and bind the ItemTemplate to it.

Guillaume

Re: Using UserControl as ItemTemplate with ItemsControl cause AccessViolationException

03-27-2008 5:30 AM |

Hello, this is the desired behavior. It's due to everything inside your parent StackPanel are in the same name scope.

Re: Re: Using UserControl as ItemTemplate with ItemsControl cause AccessViolationException

03-27-2008 5:53 AM |

Hello,
If this is the desired behavior, could you give me a sample code showing how i can use a UserControl inside an ItemTemplate ?

Thanks,

Guillaume

Re: Re: Using UserControl as ItemTemplate with ItemsControl cause AccessViolationException

03-27-2008 6:00 AM |

Oh, sorry, I thought I was replying to another thread...

Re: Re: Using UserControl as ItemTemplate with ItemsControl cause AccessViolationException

03-29-2008 6:57 PM |

I have been trying to figure out this same issue for a few days now. You would think using a UserControl within a DataTemplate would be a fairly common scenario. This must be a bug and hopefully will be fixed in Beta 2.