Question

I have a DataGridTextColumn, and wanted to set the text in the middle, I did this XAML :

        <DataGridTextColumn Header="Smooth" Binding="{Binding Smoothing}">
             <DataGridTextColumn.ElementStyle>
                    <Style TargetType="TextBox">
                        <Setter Property="VerticalContentAlignment" Value="Center"/>
                        <Setter Property="HorizontalContentAlignment" Value="Center"/>
                    </Style>
             </DataGridTextColumn.ElementStyle>
        </DataGridTextColumn>

That worked fine. I have a lot of DataGridTextColumn, so I wanted to extract the style as a resource. Which looks like :

 <UserControl.Resources>
    <Style TargetType="TextBox"  x:Key="TextBoxStyle">
        <Setter Property="VerticalContentAlignment" Value="Center"/>
        <Setter Property="HorizontalContentAlignment" Value="Center"/>
    </Style>


</UserControl.Resources>

and I do this for my GridItem :

<DataGridTextColumn Header="Smooth" Binding="{Binding Smoothing}" ElementStyle="{StaticResource ResourceKey=TextBoxStyle}"/>

I actually get a crash complaining when checking the TargetType. Any ideas why the first parts work but not the second part?

Thanks

Answer 1

Your DataGridTextColumn.ElementStyle should be targetted to a TextBlock and NOT TextBox.

<Style TargetType="TextBlock" x:Key="TextBlockStyle">
     <Setter Property="VerticalContentAlignment" Value="Center"/>
     <Setter Property="HorizontalContentAlignment" Value="Center"/>
 </Style> 

Your DataGridTextColumn.EditingElementStyle should be the one that targets a TextBox (if your data grid or column is editable)

(Simply because readonly text cell has TextBlock and text cell in edit mode has a TextBox in it)