c# - WPF 绑定(bind)到不在 DataGrid ItemSsource 中的属性

Question

我想知道如何将 DataGrid DataGridTemplateColumn 绑定(bind)到不在 DataGrid ItemSource 中但该属性位于 Itemsource 的同一 DataContext 中的属性？

XAML

        // I am trying to bind the Visibility property to a property called Visible
        <DataGridTemplateColumn Header="Apply" Visibility="{Binding source Visible}">

        // However the visible property doesnt exist inside the resource cvsCustomers
        ItemsSource="{Binding Source={StaticResource CustomerCollection}}"

C#

    // But they both live in the same ViewModel i.e. DataContext      
    private Visibility m_Visible = Visibility.Hidden;

    public Visibility Visible
    {
       get { return m_Visible; }
       set { m_Visible = value; }
    }

    private ObservableCollection<Customer> m_CustomerCollection = null;

    public ObservableCollection<Customer> CustomerCollection
    {
       get { return m_CustomerCollection; }
       set { m_CustomerCollection = value; }
    }

这能实现吗？

谢谢

Answer 1

Datagrid 列不在 DataGrid 的可视化树下。因此，您需要使用 BindingProxy 使 ViewModel 可供您的 DataGridTemplateColumn 访问。我在下面的答案中解释了如何创建和使用 BindingProxy:

Bind ViewModel property to DataGridComboBoxColum

设置 BindingProxy 后，您可以将 DataGridTemplateColumn 可见性绑定(bind)为

<DataGridTemplateColumn Header="Apply" Visibility="{Binding Path=Data.Visible, Source={StaticResource ProxyElement}"