Question

I am relatively new to .NET/C#/WPF/XAML. I have noticed sometimes controls seem to be “missing” the simplest properties to affect style. As a result, the class Style must be used to modify the the look-and-feel of a control. This is OK, but I find myself hunting on Google/StackOverflow to find the name of a particular attribute to modify.

I am searching for a canonical and complete source of default Control Styles and Templates for ALL .NET Framework WPF controls.

Before you answer too quickly, please keep reading to understand my confusion.

On this Microsoft doc page DataGrid Styles and Templates, I see the template for DataGridCell:

<!--Style and template for the DataGridCell.-->
<Style TargetType="{x:Type DataGridCell}">
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type DataGridCell}">
        <Border x:Name="border"
                BorderBrush="Transparent"
                BorderThickness="1"
                Background="Transparent"
                SnapsToDevicePixels="True">
          <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="FocusStates">
              <VisualState x:Name="Unfocused" />
              <VisualState x:Name="Focused" />
            </VisualStateGroup>
            <VisualStateGroup x:Name="CurrentStates">
              <VisualState x:Name="Regular" />
              <VisualState x:Name="Current">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="border"
                                                Storyboard.TargetProperty="(Border.BorderBrush).
                      (SolidColorBrush.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource DatagridCurrentCellBorderColor}" />
                  </ColorAnimationUsingKeyFrames
                                                >
                </Storyboard>
              </VisualState>
            </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

This page from MSDN forums, shows the following Style/Triggers/Setters.

<SolidColorBrush x:Key="{x:Static DataGrid.FocusBorderBrushKey}" Color="#FF000000"/>
 <Style TargetType="{x:Type DataGridCell}">
 <Setter Property="Background" Value="Transparent"/>
 <Setter Property="BorderBrush" Value="Transparent"/>
 <Setter Property="BorderThickness" Value="1"/>
 <Setter Property="Template">
  <Setter.Value>
  <ControlTemplate TargetType="{x:Type DataGridCell}">
   <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
   <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
   </Border>
  </ControlTemplate>
  </Setter.Value>
 </Setter>
 <Style.Triggers>
  <Trigger Property="IsSelected" Value="True">
  <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
  <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
  <Setter Property="BorderBrush" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
  </Trigger>
  <Trigger Property="IsKeyboardFocusWithin" Value="True">
  <Setter Property="BorderBrush" Value="{DynamicResource {x:Static DataGrid.FocusBorderBrushKey}}"/>
  </Trigger>
 </Style.Triggers>
 </Style>

Why don’t I see properties Background, Foreground, BorderBrush in the first template?

I have a feeling the VisualState stuff is a reference, but I cannot find the source.

Answer 1

Here you can download the default style dictionaries for the WPF controls Default WPF Themes.
It can be very helpfull to know how the default style works if you have to restyle a control.