wpf 相对源数据触发器绑定不起作用
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RelativeSource data trigger binding not working
提问by Sloth Armstrong
I am trying to set the background color of a DataGridTextColumnto another color if it is read-only. I am doing so with the following code:
DataGridTextColumn如果a是只读的，我试图将它的背景颜色设置为另一种颜色。我正在使用以下代码执行此操作：
<DataGridTextColumn Header="Test" IsReadOnly="True">
<DataGridTextColumn.ElementStyle>
<Style TargetType="{x:Type TextBlock}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsReadOnly, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGridTextColumn}}}" Value="True">
<Setter Property="Background" Value="LightGreen"/>
</DataTrigger>
</Style.Triggers>
</Style>
</DataGridTextColumn.ElementStyle>
</DataGridTextColumn>
I am having no luck, however removing the triggers results in the background always being light green. Is something wrong with the data trigger binding? I am relatively new to WPF but this is what I could find online. Ideally this would be in App.XAML so it would work across all columns such as this, so would there then be a way to translate this to a style? Thanks.
我运气不好，但是删除触发器会导致背景始终为浅绿色。数据触发器绑定有问题吗？我对 WPF 比较陌生，但这是我可以在网上找到的。理想情况下，这将在 App.XAML 中，因此它可以在所有列中工作，例如这样，那么有没有办法将其转换为样式？谢谢。
Edit---------
编辑 - - - - -
If I bind by ElementName it works:
如果我通过 ElementName 绑定它可以工作：
<DataTrigger Binding="{Binding IsReadOnly, ElementName=stupid}" Value="True">
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
However I would like this to be more generic if possible. Thanks again.
但是，如果可能的话，我希望这更通用。再次感谢。
采纳答案by Clark
Edit: Didn't check for a background property on DataGridTextColumn at first.
编辑：起初没有检查 DataGridTextColumn 上的背景属性。
This answered your original question -
这回答了您最初的问题-
<DataGridTextColumn Header="Test" IsReadOnly="True" Binding="{Binding name}" x:Name="MyColumn">
<DataGridTextColumn.ElementStyle>
<Style TargetType="{x:Type TextBlock}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsReadOnly, ElementName=MyColumn}" Value="True">
<Setter Property="Background" Value="Orange" />
</DataTrigger>
</Style.Triggers>
</Style>
</DataGridTextColumn.ElementStyle>
</DataGridTextColumn>
To answer your second question, the DataTrigger binidng you are looking for is:
要回答您的第二个问题，您正在寻找的 DataTrigger binidng 是：
<DataTrigger Binding="{Binding IsReadOnly, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGridCell}}}" Value="True">
In Summary, look for the parent DataGridCell instead of DataGridTextColumn. The reason for this is the TextBlock you are trying to style is not actually a child of DataGridTextColumn, but a child of the DataGridTextColumn's peer.
总之，查找父 DataGridCell 而不是 DataGridTextColumn。这样做的原因是您尝试设置样式的 TextBlock 实际上不是 DataGridTextColumn 的子项，而是 DataGridTextColumn 对等项的子项。
