wpf - 我可以在 DataGrid 表之间共享 DataGrid.Columns

Question

我有 3 个共享相同数据类型的数据网格。我想配置一次列绑定(bind)并让 3 个数据网格共享资源。

例如

       <DataGrid Grid.Row="1" x:Name="primaryDG" ItemsSource="{Binding Path=dgSource AutoGenerateColumns="False">
       <DataGrid.Columns>
            <DataGridTextColumn Width="Auto" Header="Column 1" Binding="{Binding Path=Col1}"/>
            <DataGridTextColumn Width="Auto" Header="Column 2" Binding="{Binding Path=Col2}"/>
            <DataGridTextColumn Width="Auto" Header="Column 3" Binding="{Binding Path=Col3}"/>
            <DataGridTextColumn Width="Auto" Header="Column 4" Binding="{Binding Path=Col4}"/>
        </DataGrid.Columns>
    </DataGrid>

有没有办法为每个 DataGrid 设置 ItemsSource，然后使用 datatemplate 或 controltemplate 来获取列？

Answer 1

这个答案基于 MarquelV 的解决方案。在他的回答(和评论)中，他提到了一个名为 EnhancedDataGrid 的自定义控件。 ，他提供了设置 DataGrid.Columns 的逻辑属性(property)。这是 EnhancedDataGrid 的代码:

public class EnhancedDataGrid : DataGrid
    {
        //the dependency property for 'setting' our columns
        public static DependencyProperty SetColumnsProperty = DependencyProperty.Register(
            "SetColumns",
            typeof (ObservableCollection<DataGridColumn>),
            typeof (EnhancedDataGrid),
            new FrameworkPropertyMetadata
            {
                DefaultValue = new ObservableCollection<DataGridColumn>(),
                PropertyChangedCallback = EnhancedDataGrid.SetColumnsChanged,
                AffectsRender = true,
                AffectsMeasure = true,
                AffectsParentMeasure = true,
                IsAnimationProhibited = true,
                DefaultUpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
            });

        //callback to reset the columns when our dependency property changes
        private static void SetColumnsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var datagrid = (DataGrid) d;

            datagrid.Columns.Clear();
            foreach (var column in (ObservableCollection<DataGridColumn>)e.NewValue)
            {
                datagrid.Columns.Add(column);
            }
        }

        //The dependency property wrapper (so that you can consume it inside your xaml)
        public ObservableCollection<DataGridColumn> SetColumns
        {
            get { return (ObservableCollection<DataGridColumn>) this.GetValue(EnhancedDataGrid.SetColumnsProperty); }
            set { this.SetValue(EnhancedDataGrid.SetColumnsProperty, value); }
        } 
    }

现在您可以使用在您的 CustomControl 中创建的 SetColumns 依赖属性设置列:

<custom:EnhancedDataGrid SetColumns="{StaticResource MyColumnDefs}" ItemsSource="{Binding Foo1}" />
<custom:EnhancedDataGrid SetColumns="{StaticResource MyColumnDefs}" ItemsSource="{Binding Foo2}" />
<custom:EnhancedDataGrid SetColumns="{StaticResource MyColumnDefs}" ItemsSource="{Binding Foo3}" />