wpf 如何将 DataGridTemplateColumn.Visibility 绑定到 DataGrid.ItemsSource 之外的属性？
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How to bind DataGridTemplateColumn.Visibility to a property outside of DataGrid.ItemsSource?
提问by Gypsy
I need to bind the Visibilityof a DataGridTemplateColumnto 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 ItemsSourceor you should use ElementStyleand EditingElementStyleI've Already tried this code:
我需要绑定Visibility的DataGridTemplateColumn到的属性之外DataGrid.ItemsSource，因为我需要在所有行此列绑定到一个属性内的ViewModel，但据我所知，你才可以绑定那个东西里面ItemsSource，或者你应该使用ElementStyle，EditingElementStyle我已经试过这个代码：
<DataGridTemplateColumn Header="post"
Visibility="{Binding DataContext.ProjectPostVisibility
, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=MvvmCommonControl:DataGrid}}"/>
And i'm Sure my binding is correct because it works fine when i bind the DataGridCell.Visibilitylike below:
而且我确定我的绑定是正确的，因为当我绑定DataGridCell.Visibility如下内容时它可以正常工作：
<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 >
回答by Abdusalam Ben Haj
Your binding is correct, but it won't work with DataGridTemplateColumndirectly because it's not in the visual tree. So it's not inherting DataContext.
您的绑定是正确的，但不能DataGridTemplateColumn直接使用，因为它不在可视化树中。所以它不是继承的DataContext。
You need to bind the DataGridTemplateColumnfrom code behind. Here is a demothat shows a way of doing it.
您需要绑定DataGridTemplateColumn后面的代码。这是一个演示，展示了一种方法。
回答by Bianca Kalman
Add this setter in the DataGridTemplateColumn.CellStyle and done:
在 DataGridTemplateColumn.CellStyle 中添加这个 setter 并完成：
<Setter Property="Visibility" Value="{Binding DataContext.isVisible, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=DataGrid}}"/>
If you need more help look at my example below. I want the Remove button to not be visible at the project level. First you have to make sure you have a isVisible property in your view model:
如果您需要更多帮助，请查看我下面的示例。我希望删除按钮在项目级别不可见。首先，您必须确保您的视图模型中有一个 isVisible 属性：
private System.Windows.Visibility _isVisible;
public System.Windows.Visibility isVisible
{
get { return _isVisible; }
set
{
if (_isVisible != value)
{
_isVisible = value;
OnPropertyChanged("isVisible");
}
}
}
Then:
然后：
if (isProj == false)
this.model.isVisible = Visibility.Visible;
else
this.model.isVisible = Visibility.Collapsed;
XAML:
XAML：
<DataGridTemplateColumn >
<DataGridTemplateColumn.CellTemplate >
<DataTemplate >
<Button x:Name="btnRemove" Content="X">
<Button.Style>
<Style TargetType="{x:Type Button}">
<Setter Property="FontWeight" Value="ExtraBold" />
<Setter Property="FontSize" Value="50" />
</Style>
</Button.Style>
</Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Background" Value="Red"/>
<Setter Property="Visibility" Value="{Binding DataContext.isVisible, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=DataGrid}}"/>
</Style>
</DataGridTemplateColumn.CellStyle>
