wpf - 单击编辑 WPF 数据网格，组合框模板列

Question

我有一个包含三列的网格:

1. 友好名称
2. 大陆名称
3. 国家名称

第一列是可编辑的文本框列。第二列是一个显示大陆列表的组合框。第三列是一个组合框，显示基于第二列中所选大陆的国家/地区列表。我想为这些列实现单击。我尝试了此链接中给出的解决方案 Single click edit in WPF DataGrid

但这只适用于第一列，不适用于其他两列 (DataGridTemplateColumn)。

这怎么可能。请建议。下面给出了示例 XAML 和数据描述。

<DataGrid Grid.Row="1" VerticalAlignment="Top"
                                   ItemsSource="{Binding Path=GeographyData,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                                  Style="{StaticResource DataGridStyleNormal}">
                            <DataGrid.Columns>
                                <DataGridTextColumn Width="*" Header="Friendly name" Binding="{Binding Path=FriendlyName,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                                <!--FilterDef -->
                                <DataGridTemplateColumn Width="*"
                                                        Header="Continents">
                                    <DataGridTemplateColumn.CellEditingTemplate>
                                        <DataTemplate>
                                            <ComboBox SelectedValue="{Binding ContinentId, Mode=TwoWay}"
                                                      SelectedValuePath="ID"
                                                      DisplayMemberPath="Name"
                                                      ItemsSource="{Binding Path=DataContext.ContinentsAndCountries,Mode=OneWay,UpdateSourceTrigger=PropertyChanged,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGrid}}}"/>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellEditingTemplate>
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBlock>
                                               <TextBlock.Text>
                                                    <MultiBinding Converter="{StaticResource ContinentCaptionConverter}">
                                                          <Binding Path="ContinentId"/>
                                                          <Binding Path="DataContext.ContinentsAndCountries" RelativeSource="{RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGrid}}"/>
                                                        </MultiBinding>
                                                </TextBlock.Text>
                                            </TextBlock>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>
                                <!--Level-->
                                <DataGridTemplateColumn Width="*"
                                                        Header="Countries">
                                    <DataGridTemplateColumn.CellEditingTemplate>
                                        <DataTemplate>
                                            <ComboBox SelectedValue="{Binding CountryId, Mode=TwoWay}"
                                                      SelectedValuePath="ID"
                                                      DisplayMemberPath="Name">
                                                <ComboBox.ItemsSource>
                                                    <MultiBinding Converter="{StaticResource CountryValuesConverter}">
                                                        <Binding Path="DataContext.ContinentsAndCountries" RelativeSource="{RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGrid}}"/>
                                                        <Binding Path="ContinentId"/>
                                                    </MultiBinding>
                                                </ComboBox.ItemsSource>
                                            </ComboBox>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellEditingTemplate>
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBlock>
                                               <TextBlock.Text>
                                                    <MultiBinding Converter="{StaticResource CountryCaptionConverter}">
                                                            <Binding Path="DataContext.ContinentsAndCountries" RelativeSource="{RelativeSource Mode=FindAncestor,AncestorType={x:Type DataGrid}}"/>
                                                            <Binding Path="ContinentId"/>
                                                            <Binding Path="CountryId"/>
                                                        </MultiBinding>
                                                </TextBlock.Text>
                                            </TextBlock>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>
                            </DataGrid.Columns>
                        </DataGrid>

注意:数据“ContinentsAndCountries”是主从数据的可观察集合。

• 吉里加

Answer 1

我通过设置组合框加载事件来做到这一点

private void DataGridComboboxTemplate_Loaded(object sender, RoutedEventArgs e)
    {
        if (sender != null)
        {
            ComboBox cmb = sender as ComboBox;
            cmb.IsDropDownOpen = true;
        }
    }