WPF SelectionChanged为相同的值

Question

我在ComboBox项目中使用SelectionChanged,但是当我再次选择相同的项目时,SelectionChanged函数不会触发,我需要它来执行此操作.我怎么能告诉它不要选择我做的选择.

private void ComboBox_SelectionChanged4(object sender, SelectionChangedEventArgs e)
    {

      //do some stuff

    }

XAML:

<ComboBox   Height="30" Name="Combo4" Style="{StaticResource CategoryComboBox}"   SelectionChanged="ComboBox_SelectionChanged4" Grid.ColumnSpan="2"  Grid.Column="0">
            <ComboBoxItem Content="ComboBox Item 1 (Example)" />
            <ComboBoxItem Content="ComboBox Item 2 (Example)" />
            <ComboBoxItem Content="ComboBox Item 3 (Example)" />
            <ComboBoxItem Content="ComboBox Item 4 (Example)" />
        </ComboBox>

添加项目:

for (int i = 0; i < Pr4.Count(); i++)
        {
            ComboBoxItem item = new ComboBoxItem();
            item.Content = Pr4[i];
            Combo4.Items.Add(item);

        }

Answer 1

我用了DropDownClosed,谢谢 - 克莱门斯