Exception "Failed to assign to property"

[Shawn Burke]

Hi there,

I've tried the latest hotfix (RadControls_for_Silverlight_4_2011_1_0510_DEV_hotfix) and run into exception:

Failed to assign to property 'System.Windows.Setter.Value'. [Line: 33 Position: 12]<br>
   at MS.Internal.XcpImports.CreateFromXaml(UnmanagedMemoryStream stream, String sourceAssemblyName, Boolean createNamescope, Boolean requireDefaultNamespace, Boolean allowEventHandlers)<br>



<UserControl x:Class="RadTreeView0510.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:telerikNavigation="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation">

    <Grid x:Name="LayoutRoot" Background="White">
                <telerikNavigation:RadTreeView/>
        </Grid>
</UserControl>

Thanks

[Richard Iwasa]

I'm running into the same error with the same hotfix version, but with the RadOutlookBar control.

FYI, my name space declaration was:

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

I also tried:

xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"



but with no effect.

[Richard Iwasa]

Tried a simple Silverlight application, added references to Telerik.Windows.Controls and Telerik.Windows.Controls.Navigation out of the hotfix build, added a RadOutlookBar to the MainPage.xaml by dragging from the toolbar, and saw the attached error. Was able to build and run, but on load of MainPage.xaml, got the error below. Tried with RadTreeView as well, and got the same error.

System.Windows.Markup.XamlParseException occurred
  Message=Set property 'System.Windows.FrameworkElement.Style' threw an exception. [Line: 10 Position: 25]
  LineNumber=10
  LinePosition=25
  StackTrace:
       at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
       at TelerikUpgrade501.MainPage.InitializeComponent()
       at TelerikUpgrade501.MainPage..ctor()
  InnerException: System.Windows.Markup.XamlParseException
       Message=Failed to assign to property 'System.Windows.Setter.Value'. [Line: 33 Position: 12]
       LineNumber=33
       LinePosition=12
       StackTrace:
            at MS.Internal.XcpImports.CreateFromXaml(UnmanagedMemoryStream stream, String sourceAssemblyName, Boolean createNamescope, Boolean requireDefaultNamespace, Boolean allowEventHandlers)
            at System.Windows.Controls.Control.GetBuiltInStyle(IntPtr nativeTarget, IntPtr& nativeStyle)
       InnerException:

[Ondrej]

I have same problem.

[Richard Iwasa]

I filed a support ticket and got access to the 516 hotfix build which fixes the problem.

[Shawn Burke]

Thanks man

[Oliver]

i have this problem .
please help me.

[Petar Mladenov]

Hi Oliver,

This problem is already fixed. Please test your application with the internal build 516 that you can download from your account page at www.telerik.com . Let us know if you need further help.

Regards,
Petar Mladenov
the Telerik team