Question

I have a DataGrid containing some DataGridComboBoxColumns.

I would like the comboBoxes inside those columns to have a certain style applied.

so I tried adding the following to my DataGrid’s Resources:

<Style x:Key="{x:Type ComboBox}" TargetType="{x:Type ComboBox}">
    <Setter Property="SnapsToDevicePixels" Value="true"/>
    <Setter Property="OverridesDefaultStyle" Value="true"/>
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>

    <Setter Property="Background" Value="{StaticResource DefaultBackgroundBrush}"/>
    <Setter Property="BorderBrush" Value="{StaticResource DefaultBorderBrush}"/>
    <Setter Property="Foreground" Value="{StaticResource DefaultForegroundBrush}"/>
    <Setter Property="FontFamily" Value="{StaticResource DefaultFontFamily}"/>
    <Setter Property="FontSize" Value="{StaticResource DefaultFontSize}"/>
    <Setter Property="Padding" Value="2"/>
</Style>

does not do anything at all.

amazingly enough, if I add:

<Style x:Key="{x:Type ComboBoxItem}" TargetType="ComboBoxItem">
    <Setter Property="SnapsToDevicePixels" Value="true"/>
    <Setter Property="OverridesDefaultStyle" Value="true"/>
    <Setter Property="Foreground" Value="Red"/>
</Style>

the comboBoxItems inside the same comboBoxes will get the red foreground color Correctly.

so basically, I cannot set the style of the comboBoxes inside my dataGrid, but I can set the style of the comboBoxItems inside those same comboBoxes.

quite surprising…

does anyone have a clue about what’s going on here and how I can solve my problem?

thanks

Answer 1

What exactly is this supposed to do? x:Key="{x:Type ComboBox}"

You should not assign keys if you want styles to be applied to all controls in the subtree.

Edit: To apply the styles to the ComboBoxes you must adjust the properties DataGridComboBoxCotlumn.ElementStyle and DataGridComboBoxColumn.EditingElementStyle.