Hi,
The Telerik RadControls used in the Silverlight application I'm testing have been recently upgraded (just today) using RadControls_for_Silverlight_4_2010_2_0812 version. I'm now encountering an Invalid Cast Exception. The error message is like this:
InnerException:
ArtOfTest.WebAii.Silverlight.ExecuteSilverlightCommandException: [Silverlight Extension Error] Details: System.InvalidCastException: Error 0x17E0. Debugging resource strings are unavailable. See
http://go.microsoft.com/fwlink/?linkid=106663&Version=4.0.50524.0&File=mscorrc.dll&Key=0x17E0
at Telerik.Windows.Controls.ListBoxItem.OnCreateAutomationPeer()
at System.Windows.Automation.AutomationProperties.GetAutomationId(DependencyObject element)
at ArtOfTest.SLExtension.ClientServices.GetXmlFromNode(DependencyObject element, Boolean isClosing)
at ArtOfTest.SLExtension.ClientServices.SerializeNode(DependencyObject root, StringBuilder sb, List`1 popups)
at ArtOfTest.SLExtension.ClientServices.SerializeNode(DependencyObject root, StringBuilder sb, List`1 popups)
...
The erring line looks like this:
IList<Telerik.WebAii.Controls.Xaml.RadComboBoxItem> list = Pages.GRCPlatform.SilverlightApp.AssignedDropDownWatermarkcombobox.Find.AllByType<Telerik.WebAii.Controls.Xaml.RadComboBoxItem>();
This test has been passing before the upgrade (yesterday). I also tried running other tests with the same line (pages with RadComboBoxItems) - the same error is encountered. I am using an internal build for the tool: Telerik.WebUI.TestStudio.QA.2010.2.818, which I installed and tested before this upgrade. Can you please help me resolve this issue?
Regards,
QA