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My code is :
The richtextbox's content can not be display in GridView's rowdetail!
<telerik:RadGridView.RowDetailsTemplate> <DataTemplate> <StackPanel Orientation="Vertical"> <TextBlock Text="NewsContent"/> <RichTextBox x:Name="_NewsContent"> <RichTextBox.Resources> <telerikhtml:HtmlDataProvider x:Key="_HtmlDataProvider" RichTextBox="{Binding ElementName=_NewsContent}" Html="{Binding NewsContent}"/> </RichTextBox.Resources> </RichTextBox> </StackPanel> </DataTemplate> </telerik:RadGridView.RowDetailsTemplate>