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我有一种情况,我想让输入到可编辑 ComboBox 中的文本在被更改并调用 TextChanged 处理程序时被选中。原因是在组合框的 SelectionChanged 处理程序中完成了一些非常重要的工作。

ComboBox 在后面的代码中定义如下:

<ListView.View>
            <GridView x:Name="callListView" AllowsColumnReorder="True" ColumnHeaderToolTip="Broadcast call targets" >
               <GridViewColumn Width="120">
                  <GridViewColumn.CellTemplate>
                     <DataTemplate>
                        <ComboBox ItemsSource="{Binding Path=extensions, RelativeSource={RelativeSource AncestorType=Window}}"
                                  Width="105" IsEditable="True" HorizontalAlignment="Center" Margin="0,0,0,0" BorderThickness="0"
                                  SelectedItem="{Binding Path=Key, Mode=OneWay}" SelectionChanged="chooseExtension_SelectionChanged"
                                  TextBoxBase.TextChanged="chooseExtension_TextChanged" IsTextSearchEnabled="False">
                           <ComboBox.Resources>
                              <sys:Double x:Key="{x:Static SystemParameters.VerticalScrollBarWidthKey}">15</sys:Double>
                           </ComboBox.Resources>
                        </ComboBox>
                     </DataTemplate>
                  </GridViewColumn.CellTemplate>
               </GridViewColumn>
            </GridView>
<!-- a bunch of unrelated stuff was removed to keep this simple -->
         </ListView.View>

有没有办法让 TextChanged 之后的当前文本成为 ComboBox 的 SelectedValue?

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