DataGrid 支持字符截断显示

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>