DataContext in a DataGridTemplateColumn?

[Shawn]

I am building a DataTemplate and I expected setting the DataContext inside the cell template would work, but it doesn't. This is what I am trying:

<DataTemplate>
  <StackPanel DataContext="{Binding Item}">
    <TextBlock Text="{Binding Name}" />
    <TextBlock Text="{Binding Price}" />
  </StackPanel>
</DataTemplate>

If I change it to this it works but for a complex piece of code that's a lot of children objects:

<DataTemplate>
  <StackPanel>
    <TextBlock Text="{Binding Item.Name}" />
    <TextBlock Text="{Binding Item.Price}" />
  </StackPanel>
</DataTemplate>

Shouldn't this work?

[Ivaylo Gergov]

Hi Shawn,

Thank you for your question.

The UI Virtualization of RadDataGrid explicitly sets the DataContext of the root element in each cell to the ViewModel instance that represents the row. Therefore, <StackPanel DataContext="{Binding Item}"> will not work as the Binding will get overridden. If we only had the FrameworkElement.GetBindingExpression API we would have been more flexible here.

Anyways, to achieve the desired goal I suggest you add another object as a root element of the template. For example, this should work properly:

<DataTemplate>
    <Border>
      <StackPanel DataContext="{Binding Item}">
        <TextBlock Text="{Binding Name}" />
        <TextBlock Text="{Binding Price}" />
      </StackPanel>
    </Border>
</DataTemplate>

I hope this is useful. Let me know should you have any other questions.


Regards,
Ivaylo Gergov
Telerik

[Shawn]

Great thanks!

[majid malik]

Can anybody provide a sampe where a RadGridView has

1) A few templated columns

2) Each column has a copy of a celltemplate which is hosting a usercontrol

3) The usercontrol gets the column and row of the cell during grid binding operation and populates the cell with it own data.

4) then with the horizontal scrolling of the grid the data in the cells remains the same.

thankx in advance