如何将DataGridTemplateColumn.Visibility绑定到DataGrid.ItemsSource之外的属性？ [英] How to bind DataGridTemplateColumn.Visibility to a property outside of DataGrid.ItemsSource?

问题描述

我需要将 DataGridTemplateColumn 的 Visibility 绑定到 DataGrid.ItemsSource ，因为我需要将所有行中的此列绑定到 ViewModel 中的一个属性，但据我所知只需将它绑定到 ItemsSource 中的内容，或者您​​应该使用 ElementStyle 和 EditingElementStyle
我已经尝试过这个代码：

I need to bind the Visibility of a DataGridTemplateColumn to a property outside of the DataGrid.ItemsSource,because i need to bind this column in the all the rows to one property inside the ViewModel,but as far as i know you just can bind that to something inside the ItemsSource or you should use ElementStyle and EditingElementStyle I've Already tried this code:

 <DataGridTemplateColumn Header="post" 
                      Visibility="{Binding DataContext.ProjectPostVisibility
                    , RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=MvvmCommonControl:DataGrid}}"/>

我确定我的绑定是正确的，因为当我绑定 DataGridCell.Visibility 如下所示：

And i'm Sure my binding is correct because it works fine when i bind the DataGridCell.Visibility like below:

<DataGridTemplateColumn Header="post">
    <DataGridTemplateColumn.CellStyle>
                        <Style TargetType="DataGridCell">
                            <Setter Property="Visibility" Value="{Binding DataContext.ProjectPostVisibility,RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=MvvmCommonControl:DataGrid}}"/>
                        </Style>
                    </DataGridTemplateColumn.CellStyle>
</DataGridTemplateColumn >

推荐答案

你的绑定是正确的，但它不会工作直接使用 DataGridTemplateColumn ，因为它不在视觉树中。所以它不是继承 DataContext 。

Your binding is correct, but it won't work with DataGridTemplateColumn directly because it's not in the visual tree. So it's not inherting DataContext.

你需要绑定 DataGridTemplateColumn 从代码后面。 这是一个演示，展示了一种方式。

You need to bind the DataGridTemplateColumn from code behind. Here is a demo that shows a way of doing it.

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