DataGridComboBoxColumn selectItem绑定问题

Question

我正在尝试在DataGrid中创建一个ComboBox来执行selectItem绑定，但是当我编写此代码时，我在列中的ComboBox中选择一个项目时，DataGrid列中的所有ComboBox项都是绑定的并显示相同的选定项。我需要将每个ComboBox项与其selectedItem绑定。我很乐意得到帮助。

这是我的代码：

                        <DataGridComboBoxColumn  Header="CHOOSE" Width="0.7*"  
            DisplayMemberPath="Name" SelectedItemBinding="{Binding Path=SelectedReceiver,{RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">               
    <DataGridComboBoxColumn.ElementStyle>                      
                    <Style TargetType="{x:Type ComboBox}">
                        <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}, Path=DataContext.RxList}" />
                        <Setter Property="ItemTemplate" >
                            <Setter.Value>
                                <DataTemplate>
                                    <TextBlock Text="{Binding Path= Name}" Style="{StaticResource GroupBoxHeaderTextBlockStyle}" />
                                </DataTemplate>
                            </Setter.Value>
                        </Setter>
                    </Style>
                </DataGridComboBoxColumn.ElementStyle >
                <DataGridComboBoxColumn.EditingElementStyle>
                    <Style TargetType="{x:Type ComboBox}">
                        <Setter Property="ItemsSource" Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}, Path=DataContext.RxList }" />
                        <Setter Property="ItemTemplate">
                            <Setter.Value>
                                <DataTemplate>
                                    <TextBlock Text="{Binding Path= Name}" Style="{StaticResource GroupBoxHeaderTextBlockStyle}"/>
                                </DataTemplate>
                            </Setter.Value>
                        </Setter>
                    </Style>
                </DataGridComboBoxColumn.EditingElementStyle>
    </DataGridComboBoxColumn>

Answer 1

当你真正需要绑定到DataGrid.ItemsSource.SomeList时绑定到DataGrid.ItemsSource[x].SomeList。

基本上，您的列表和所选项目对于每列始终是相同的。您可以使用item-model-class的静态列表（如果列表保持不变）和SelectedItem的属性。

<DataGridComboBoxColumn SelectedItemBinding="{Binding SelectedReceiver}"> <!-- Bind to current item's SelectedReceiver -->
    <DataGridComboBoxColumn.ElementStyle>
        <Style TargetType="{x:Type ComboBox}">
            <Setter Property="ItemsSource" Value="{Binding Path=(modelNamespace:MyModel.RxList)}"/> <!-- Bind to static list property -->
        </Style>
    </DataGridComboBoxColumn.ElementStyle>
</DataGridComboBoxColumn>