我有一个组合框,我需要在我的视图模型中使用一个命令来绑定它的ContextMenuOpening事件。我已经尝试引用System.Windows.Interactivity并使用InvokeCommandAction,但命令没有调用。有谁看到我哪里出错了?
<ComboBox x:Name="comboBoxAssets" Grid.Column="0" VerticalAlignment="Top" Margin="928,62,0,0" Height="25"
ItemsSource="{Binding Source={StaticResource SortedAssets}}"
SelectedItem="{Binding Path=Assets, UpdateSourceTrigger=PropertyChanged}"
Style="{StaticResource ComboBoxDefault}" HorizontalAlignment="Left" Width="212" >
<i:Interaction.Triggers>
<i:EventTrigger EventName="ContextMenuOpening">
<i:InvokeCommandAction Command="{Binding ContextMenuOpeningCommand, Mode=OneWay}" />
</i:EventTrigger>
</i:Interaction.Triggers>
</ComboBox>
视图模型:
public ICommand ContextMenuOpeningCommand
{
get
{
if (_contextMenuOpeningCommand == null)
{
_contextMenuOpeningCommand = new RelayCommand<object>(param => this.ContextMenuOpening(),
null);
}
return _contextMenuOpeningCommand;
}
}
public void ContextMenuOpening()
{
System.Windows.MessageBox.Show("test", "test");
}
private ICommand _contextMenuOpeningCommand;
答案 0 :(得分:1)
请尝试使用DropDownOpened来查看该命令是否被命中。我尝试了它,它在这里工作。希望这会有所帮助:)