DataGrid支持截断时， 需要分2部分， DataGridColumnHeader和DataGridCell。 1)创建上述2部分的ControlTemplate 。 2）把其中的ContentPresenter改为TextBlock 3）使用TextTrimming属性 xaml code like this： <ControlTemplate x:Key="DataGridCellControlTemplate" TargetType="{x:Type DataGridCell}"> <Border Background="{TemplateBinding Background}" SnapsToDevicePixels="True" BorderThickness="0" Height="{TemplateBinding Tag}">           <TextBlock               SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"               HorizontalAlignment="Left"               VerticalAlignment="Center"               Margin="{TemplateBinding Padding}"               Text="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Content.Text}"               TextTrimming="CharacterEllipsis"               /> </Border> </ControlTemplate> <ControlTemplate x:Key="PublicDataGridColumnHeaderControlTemplate" TargetType="{x:Type DataGridColumnHeader}"> <Grid> <VisualStateManager.VisualStateGroups> <VisualStateGroup x:Name="SortStates"> <VisualState x:Name="Unsorted"/> <VisualState x:Name="SortAscending"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="path1"> <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> <VisualState x:Name="SortDescending"> <Storyboard> <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="path"> <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> </VisualStateGroup> </VisualStateManager.VisualStateGroups>           <TextBlock               SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"               VerticalAlignment="{TemplateBinding VerticalContentAlignment}"               HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"               Margin="{TemplateBinding Padding}"               Text="{TemplateBinding Content}"               TextTrimming="CharacterEllipsis"               utility:TextBlockTrimming.AutoTooltip="True"/> <Thumb x:Name="PART_LeftHeaderGripper" HorizontalAlignment="Left" Style="{DynamicResource PublicDataGridHeaderLeftGripperStyle}" Margin="0,3" Visibility="{TemplateBinding SeparatorVisibility}"/> <Thumb x:Name="PART_RightHeaderGripper" HorizontalAlignment="Right" Style="{DynamicResource PublicDataGridHeaderRightGripperStyle}" Margin="0,3" Background="#FF838282" Visibility="{TemplateBinding SeparatorVisibility}"/> <Path x:Name="path" Data="M5.0000001,0 L10,7.0000002 0,7.0000002 z" Fill="Black" HorizontalAlignment="Right" Height="4" Margin="0,2,2,0" Stretch="Fill" Stroke="{x:Null}" VerticalAlignment="Top" Width="6" Visibility="Hidden"/> <Path x:Name="path1" Data="M5,0 L10,6.9999999 0,6.9999999 z" Fill="Black" HorizontalAlignment="Right" Height="4" Margin="0,2,2,0" RenderTransformOrigin="0.5,0.499999995742525" Stretch="Fill" Stroke="{x:Null}" VerticalAlignment="Top" Width="6" Visibility="Hidden" > <Path.RenderTransform> <TransformGroup> <ScaleTransform ScaleY="-1" ScaleX="1"/> <SkewTransform AngleY="0" AngleX="0"/> <RotateTransform Angle="0"/> <TranslateTransform/> </TransformGroup> </Path.RenderTransform> </Path> </Grid> <ControlTemplate.Triggers> <Trigger Property="SeparatorVisibility" Value="Hidden"> <Setter Property="Visibility" TargetName="PART_LeftHeaderGripper" Value="Hidden"/> <Setter Property="Visibility" TargetName="PART_RightHeaderGripper" Value="Hidden"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate>