Question

我有一个文本对齐按钮的组合框，当我尝试通过鼠标点击选择其中一个按钮时，所选项目不会改变。似乎ComboBoxItem没有得到Click事件。有人知道如何处理吗？

<ComboBox x:Name="FontAligmentCombo">
  <ComboBoxItem IsSelected="True">
    <Button Command="EditingCommands.AlignLeft"
            ToolTip="Align Left">
        <Viewbox>
            <ContentPresenter Content="{DynamicResource icon8_Win10_AlignLeft}" />
        </Viewbox>
    </Button>
  </ComboBoxItem>
  <ComboBoxItem>
    <Button Command="EditingCommands.AlignCenter"
            ToolTip="Align Center">
        <Viewbox>
            <ContentPresenter Content="{DynamicResource icon8_Win10_AlignCenter}" />
        </Viewbox>
    </Button>
  </ComboBoxItem>
</ComboBox>

Answer 1

<ComboBoxItem IsSelected="True">
<Button Command="EditingCommands.AlignLeft"
        ToolTip="Align Left">
    <Viewbox>
        <ContentPresenter Content="{DynamicResource icon8_Win10_AlignLeft}" />
    </Viewbox>
</Button>

您将IsSelected硬编码为True。尝试通过SelectedItem或SelectedIndex属性处理Combobox中的所选项目。在你的情况下索引是有道理的。如果你不能，你应该绑定bool值。

Answer 2

Button＆＃34;燕子＆＃34;点击。您必须以编程方式选择相应的ComboBoxItem。

试试这个：

<ComboBox x:Name="FontAligmentCombo">
    <ComboBox.Resources>
        <Style TargetType="Button">
            <EventSetter Event="Click" Handler="OnClick" />
        </Style>
    </ComboBox.Resources>
    <ComboBoxItem IsSelected="True">
        <Button Command="EditingCommands.AlignLeft" ToolTip="Align Left">
            <Viewbox>
                <ContentPresenter Content="{DynamicResource icon8_Win10_AlignLeft}" />
            </Viewbox>
        </Button>
    </ComboBoxItem>
    <ComboBoxItem>
        <Button Command="EditingCommands.AlignCenter" ToolTip="Align Center">
            <Viewbox>
                <ContentPresenter Content="{DynamicResource icon8_Win10_AlignCenter}" />
            </Viewbox>
        </Button>
    </ComboBoxItem>
</ComboBox>

private void OnClick(object sender, RoutedEventArgs e)
{
    Button button = sender as Button;
    ComboBoxItem cbi = FindParent<ComboBoxItem>(button);
    if (cbi != null)
    {
        FontAligmentCombo.SelectedItem = cbi;
        FontAligmentCombo.IsDropDownOpen = false;
    }
}

Wpf组合框通过鼠标选择项目

2 个答案: