This is a migrated thread and some comments may be shown as answers.

Xaml error when inside DataTemplate (.NET Core)

3 Answers 203 Views

GridView

This is a migrated thread and some comments may be shown as answers.

Heiko asked on 28 May 2020, 03:23 PM

I have a strange new bug in Visual Studio XAML Editor when I place a RadGridView inside a DataTemplate. It is quite easy to reproduce:

create a new WPF Core 3.1 project
add Telerik.UI.for.Wpf.NetCore 2020.2.513 (as NuGet package)
place the following code inside the Resource-part of the window:

01.<Window.Resources>

02. <DataTemplate x:Key="testTemplate">

03. <Grid>

04. <telerik:RadGridView>

05. <telerik:RadGridView.Columns>

06. <telerik:GridViewDataColumn DataMemberBinding="{Binding Title}"></telerik:GridViewDataColumn>

07. </telerik:RadGridView.Columns>

08. </telerik:RadGridView>

09. </Grid>

10. </DataTemplate>

11.</Window.Resources>

It does not matter that there is no ItemsSource or which field you are binding the GridViewDataColumn to. As soon as I include the property DataMemberBinding="{...}" I get a warning from "Microsoft.CodeAnalysis.Xaml.Diagnostics.Analyzers.XamlDocumentDiagnosticAnalyzer" saying that there is a NullReferenceException. From there on there is no more Intellisense or Autocomplete inside my Xaml Editor.

Could someone at Telerik check if it is just my developer machine or is it a bug that I detected? Visual Studio 2019 is Version 16.6.0.

Thanks in advance!

Regards
Heiko

3 Answers, 1 is accepted

answered on 29 May 2020, 10:23 AM

I have to add that this error has nothing to do with the DataTemplate, sorry. It makes no difference whether the grid is in a DataTemplate or not. The error always occurs when I enter a name in the {Binding ...} section of DataMemberBinding; an empty {Binding} is ok.

Today I found this ,unfortunately in japanese; seems to be a problem with latest VS Update to 16.6.0. But because Telerik and Microsoft are so close friends, maybe Telerik can do some investigative work? ;-)

Regards
Heiko