WPF DataGrid ColumnHeader样式：无法在ControlTemplate中使文本变粗体

Question

我正在使用WpfToolkit中的DataGrid。我已经采取了Style资源字典并调整了一下。我试图完成的是当数据绑定对象上的某个属性为True时，使标题变为粗体。列标题是不一定一个TextBlock和具有其控制模板重新定义为如下所示：

DataGridStyle：

<Style x:Key="ModificationsDataGridStyle" TargetType="{x:Type compCtrls:ModDataGrid}"> 
    <Setter Property="ColumnHeaderStyle" Value="{StaticResource DatagridColumnHeaderCustomTemplateStyle}" /> 
</Style> 

ColumnHeaderStyle：

<Style x:Key="DatagridColumnHeaderCustomTemplateStyle" 
     TargetType="{x:Type primitives:DataGridColumnHeader}"> 
    <Setter Property="SnapsToDevicePixels" Value="True" /> 
    <Setter Property="MinWidth" Value="0" /> 
    <Setter Property="MinHeight" Value="28" /> 
    <Setter Property="Foreground" Value="White" /> 
    <Setter Property="FontWeight" Value="Normal" /> 
    <Setter Property="Cursor" Value="Hand" /> 
    <Setter Property="Template"> 
     <Setter.Value> 
      <ControlTemplate TargetType="{x:Type primitives:DataGridColumnHeader}"> 
       <Grid> 
        <Grid.ColumnDefinitions> 
         <ColumnDefinition Width="*" /> 
         <ColumnDefinition Width="Auto" /> 
        </Grid.ColumnDefinitions> 
        <Border x:Name="BackgroundBorder" BorderThickness="0,1,0,1" 
          Background="{StaticResource DataGridHeaderBackgroundBrush}" 
          BorderBrush="{StaticResource DataGridHeaderBorderBrush}" 
          Grid.ColumnSpan="2" /> 
        <ContentPresenter x:Name="ContentPres" Margin="6,3,6,3" VerticalAlignment="Center" /> 
        <Path x:Name="SortArrow" Visibility="Hidden" Data="M0,0 L1,0 0.5,1 z" Stretch="Fill" 
          Grid.Column="1" Width="10" Height="7" Fill="White" Margin="0,0,7,0" 
          VerticalAlignment="Center" RenderTransformOrigin="0.5,0.4" /> 
        <Rectangle Width="1" Fill="#AAC377" HorizontalAlignment="Right" Grid.ColumnSpan="2" /> 

        <Rectangle Width="1" Margin="0,0,1,0" Fill="#425B10" 
           HorizontalAlignment="Right" Grid.ColumnSpan="2" /> 
        <Thumb x:Name="PART_LeftHeaderGripper" HorizontalAlignment="Left" 
          Style="{StaticResource ColumnHeaderGripperStyle}"/> 
        <Thumb x:Name="PART_RightHeaderGripper" HorizontalAlignment="Right" 
          Style="{StaticResource ColumnHeaderGripperStyle}"/> 
       </Grid> 
       <ControlTemplate.Triggers> 
        <Trigger Property="SortDirection" Value="{x:Null}"> 
         <Setter TargetName="SortArrow" Property="Visibility" Value="Collapsed" /> 
        </Trigger> 
        <Trigger Property="IsMouseOver" Value="True"> 
         <Setter Property="Background" TargetName="BackgroundBorder" 
           Value="{StaticResource DataGridHeaderMouseOverBackgroundBrush}" /> 
         <Setter Property="BorderBrush" TargetName="BackgroundBorder" 
           Value="{StaticResource DataGridHeaderBorderBrush}" /> 
        </Trigger> 
        <Trigger Property="SortDirection" Value="Ascending"> 
         <Setter TargetName="SortArrow" Property="Visibility" Value="Visible" /> 
         <Setter TargetName="SortArrow" Property="Fill" Value="Goldenrod" /> 
         <Setter TargetName="SortArrow" Property="RenderTransform"> 
          <Setter.Value> 
           <RotateTransform Angle="180" /> 
          </Setter.Value> 
         </Setter> 
        </Trigger> 
        <Trigger Property="SortDirection" Value="Descending"> 
         <Setter TargetName="SortArrow" Property="Visibility" Value="Visible" /> 
         <Setter TargetName="SortArrow" Property="Fill" Value="Brown" /> 
        </Trigger> 
        <Trigger Property="DisplayIndex" Value="0"> 
         <Setter Property="Visibility" Value="Collapsed" 
           TargetName="PART_LeftHeaderGripper"></Setter> 
        </Trigger> 
        <DataTrigger Binding="{Binding IsRevisedSummableField}" Value="True"> 
         <Setter TargetName="ContentPres" Property="Control.FontWeight" Value="Bold" /> 
        </DataTrigger> 
       </ControlTemplate.Triggers> 
      </ControlTemplate> 
     </Setter.Value> 
    </Setter> 
</Style> 

我想用一个DataTrigger（绑定到给定财产）在模板将工作。要么我错了，要么没有走正确的路。我还要提到的是，列自动生成，一旦生成列，我设置每个的DataGridColumn的DataContext的这样：

protected override void OnAutoGeneratedColumns(EventArgs e) 
    { 
     var dataTable = pivotMod.DataTable; 
     foreach (DataGridColumn gridCol in Columns) 
     { 
      var colName = gridCol.Header.ToString(); 
      DataColumn col = dataTable.Columns[colName]; 

      // give the column headers a pretty name 
      gridCol.Header = col.Caption; 

      // set the datacontext of the gridcolumn to the modfield ... 
      ModFieldGUIWrapper modField = col.ExtendedProperties["ModField"] as ModFieldGUIWrapper; 
      gridCol.SetValue(FrameworkElement.DataContextProperty, modField); 
     } 
     base.OnAutoGeneratedColumns(e); 
    } 

任何帮助是一如既往不胜感激。

干杯， 肖恩

Answer 1

找到原因所在：

我应该设置DataGridColumn.Header到包含才能正常工作在DataTrigger指定属性的数据对象。然后，我刚刚重写了我的数据类的ToString（）方法，以显示我想要的漂亮名称。

protected override void OnAutoGeneratedColumns(EventArgs e) 
    { 
     var dataTable = pivotMod.DataTable; 
     foreach (DataGridColumn gridCol in Columns) 
     { 
      var colName = gridCol.Header.ToString(); 
      DataColumn col = dataTable.Columns[colName]; 

      // set the datacontext of the gridcolumn to the modfield ... 
      ModFieldGUIWrapper modField = col.ExtendedProperties["ModField"] as ModFieldGUIWrapper; 
      gridCol.SetValue(FrameworkElement.DataContextProperty, modField); 

      // set the header to the data object so that the datatrigger's binding works!! 
      gridCol.Header = modField; 

     } 
     base.OnAutoGeneratedColumns(e); 
    } 

感谢Chris W.您的评论让我走上了正确的道路！ :)