DataGrid - Scroll to the bottom chops in half the last row

Hello,

We've notice that after the 20150615 build something changed in the DataGrid and if we have many rows and scroll to the last row the last row gets chopped in half.

I don't have all the nightly build so this is how close I could get to determining which version it didn't work properly.

(this version works) 7.0.504.23417 WpfElements7Enterprise-20150615.msi

(this version DOES NOT work) 7.0.591.23436 WpfElements7Enterprise-20150908.msi

I was able to reproduce the issue using your DataGrid demo program (DataGridDemo.xaml)

Go to the xaml file and add a style to the resource to the DataGrid for the row height as shown below.

(Modify DataGridDemo.xaml as follows.)

 <ms:DataGrid ItemsSource="{Binding Data}" ShowColumnHeaders="{Binding ShowColumnHeaders}" ShowRowHeaders="{Binding ShowRowHeaders}"
             AllowColumnReorder="{Binding AllowColumnReorder}" AllowEditing="{Binding AllowEditing}" CellEditModeBehavior="{Binding EditModeBehavior}">
    <ms:DataGrid.Resources>
            <Style TargetType="{x:Type ms:DataGridRow}" BasedOn="{StaticResource {x:Type ms:DataGridRow}}">
                <Setter Property="Height" Value="40"/>
            </Style>
        </ms:DataGrid.Resources>
  <ms:DataGrid.Columns>
    <ms:DataGridColumn PropertyName="FavoriteColor" Width="150" />
    <ms:DataGridColumn PropertyName="Surname" Width="120" />
  </ms:DataGrid.Columns>
</ms:DataGrid>

If you use this with the version 7.0.504.23417 WpfElements7Enterprise-20150615.msi the datagrid behaves properly. You can scroll the datagrid and resize the window and everything works.

However if you add the same style to a version such as 7.0.591.23436 WpfElements7Enterprise-20150908.msi or newer then the datagrid does not behave properly when you scroll all the way to the bottom. Rows are chopped off at the bottom. Even re-sizing the window does not help see the last rows and the datagrid behaves weirdly.

However I do not know the exact version at which this issue was introduced.

Thanks Oscar

Hi Oscar,

Thanks for pointing this out and providing repro code. This issue has been fixed. The nightly builds are not working right now, but will be fixed early next week.

-Jason Fauchelle

Thanks Jason. It seems to be working. I'll keep doing a few more tests.

Oscar