WPF Datagrid 视图标题绑定
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WPF Datagrid view header binding
提问by Kurubaran
Actually the issue im facing is slight different than what title says. I try to sumarize the issue below.
实际上，我面临的问题与标题所说的略有不同。我尝试总结下面的问题。
Class PersonnelViewModel
{
public SelectedPersonnelItem PersonnelItemViewModel;
}
Class PersonnelItemViewModel
{
}
Data Context of the View is Awhereas the Item source of the data grid is SelectedPersonnelItemwhich is a Btype property in the class A. Now i want to bind the grid column to properties defiend within class A. But its not working as the context of the grid is another class (B). How can i solve this issue ?
视图的数据上下文是A而数据网格的项目源是SelectedPersonnelItem这是类A 中的B类型属性。现在我想将网格列绑定到A类中定义的属性。但它不起作用，因为网格的上下文是另一个类（B）。我该如何解决这个问题？
XAML
XAML
<DataGrid Grid.Row="1"
SelectedItem="{Binding SelectedPersonnelItem}"
Name="PersonnelGrid"
ItemsSource="{Binding PersonnelGridData}"
event:DatagridRowDoubleClickHandler.MethodName="EditRecord"
CanUserAddRows="False">
<DataGrid.Columns>
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding IsItemChecked, UpdateSourceTrigger=PropertyChanged}"></CheckBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTextColumn Header="Name/Company"
Binding="{Binding Name}" />
<DataGridTextColumn Header="Qualification"
Binding="{Binding Qualification}" />
<DataGridTextColumn Header="Arrival"
Binding="{Binding ArrivalDate}" />
<DataGridTextColumn Header="Departure"
Binding="{Binding DepartureDate}" />
</DataGrid.Columns>
</DataGrid>
回答by cheedep
You can access the parents datacontext using
您可以使用访问父母数据上下文
Binding="{Binding RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type DataGrid}}, Path=DataContext.ColumnName}"
So to add a column showing A's Property do
所以要添加一列显示 A 的属性做
<DataGridTextColumn Header="Company" Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}, Path=DataContext.Company}"/>
回答by Kurubaran
Finally I managed to get it working. If I directly bind the property to the column header its not populating the value.
最后我设法让它工作。如果我直接将属性绑定到列标题，则不会填充该值。
I had to do as following:
我必须这样做：
<DataGridTextColumn Binding="{Binding Name}">
<DataGridTextColumn.Header>
<TextBlock Text="{Binding DataContext.MyProp,
RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type Window}}}" />
</DataGridTextColumn.Header>
</DataGridTextColumn>
