WPF DataGrid:如何将列设置为 TextWrap? [英] WPF DataGrid: How do I set columns to TextWrap?

问题描述

我不确定为什么我的代码没有正确执行 TextWrapping.它不会包装 Description 列的文本(这是我想要的).它只是将其切断，甚至不使用..."来让我知道有更多数据.

I'm not sure why my code isn't doing the TextWrapping properly. It doesn't wrap the text for the Description column (which is what I want). It just cuts it off and it doesn't even use the "..." to let me know there is more data.

我尝试使用我在网上找到的这段代码来完成这项工作，但没有奏效.理想情况下，我希望能够仅将 TextWrap 设置为某些列，而不是一般地跨所有 DataGridCell 对象设置.

I tried to use this code I found online to do the job, but it didn't work. Ideally I'd love to be able to only set TextWrap to certain columns and not generically across all DataGridCell objects.

哦，请注意，我使用的是 Microsoft.NET 4，所以这是通过它提供的 DataGrid，而不是来自 WPF 工具包.

Oh, and please do note that I am using Microsoft.NET 4 so this is the DataGrid offered through that, not from the WPF Toolkit.

<DataGrid Name="TestGrid" Grid.Row="2" Grid.ColumnSpan="2" AutoGenerateColumns="False" ItemsSource="{Binding IntTypes}" SelectedValue="{Binding CurrentIntType}">
 <DataGrid.Resources>
  <Style TargetType="{x:Type DataGridCell}">
   <Setter Property="Template">
    <Setter.Value>
     <ControlTemplate TargetType="{x:Type DataGridCell}">
      <Border Name="DataGridCellBorder">
       <TextBlock Background="Transparent" TextWrapping="WrapWithOverflow" TextTrimming="CharacterEllipsis" Height="auto" Width="auto">
        <ContentPresenter Content="{TemplateBinding Property=ContentControl.Content}"  ContentTemplate="{TemplateBinding Property=ContentControl.Content}" />
       </TextBlock>
      </Border>
     </ControlTemplate>
    </Setter.Value>
   </Setter>
  </Style>
 </DataGrid.Resources>
 <DataGrid.Columns>
  <DataGridTextColumn Header="ID" Binding="{Binding ID}" IsReadOnly="True" />
  <DataGridTextColumn Header="Interested Parties Description" Binding="{Binding Description}" IsReadOnly="False"  />
 </DataGrid.Columns>
</DataGrid>

提前致谢！

推荐答案

它不起作用，因为 TextBlock 的Text"属性实际上被设置为另一个对象，而不仅仅是一个字符串.在运行时，您的 VisualTree 看起来像:

It Doesn't work because the "Text" property of your TextBlock is actually being set to another object instead of just a string. At runtime, your VisualTree looks something like:

Cell
  - TextBlock (w/ TextWrapping and TextTrimming)
    -  ContainerVisual
       -  ContentPresenter
          -  TextBlock (auto-generated by the DataGrid)

简而言之，您的代码本质上是在做这样的事情:

In short, you're code is essentially doing something like this:

<TextBlock TextTrimming="CharacterEllipsis" TextWrapping="WrapWithOverflow">
  <TextBlock Text="The quick brown fox jumps over the lazy dog"/>
</TextBlock>

要解决此问题，请尝试按如下方式更新您的 ControlTemplate:

To fix this, try updating your ControlTemplate as follows:

<ControlTemplate TargetType="{x:Type DataGridCell}">
    <Border Name="DataGridCellBorder">
        <ContentControl Content="{TemplateBinding Content}">
            <ContentControl.ContentTemplate>
                <DataTemplate>
                    <TextBlock Background="Transparent" TextWrapping="WrapWithOverflow" TextTrimming="CharacterEllipsis" 
                                Height="auto" Width="auto" Text="{Binding Text}"/>
                </DataTemplate>
            </ContentControl.ContentTemplate>
        </ContentControl>
    </Border>
</ControlTemplate>

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