当文本框获得焦点或失去焦点时，我的ViewModel中的方法MyMethod总是被调用。但是如果我现在用Keyboard.ClearFocus（）删除焦点，那么方法MyMethod不会被调用。是否有更好的方法来解决这个问题，或者我做错了什么？

查看：

<TextBox x:Name="MyTextBox" HorizontalAlignment="Left" Margin="35,237,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Text="{Binding MyTextBoxText}">
            <i:Interaction.Triggers>
                <i:EventTrigger EventName="LostFocus">
                    <prism:InvokeCommandAction Command="{Binding MyCommand}">
                        <prism:InvokeCommandAction.CommandParameter>
                            <MultiBinding Converter="{StaticResource multiParameterConverter}">
                                <Binding Path="Name" ElementName="MyTextBox"/>
                                <Binding Path="IsFocused" ElementName="MyTextBox"/>
                            </MultiBinding>
                        </prism:InvokeCommandAction.CommandParameter>
                    </prism:InvokeCommandAction>
                </i:EventTrigger>
            </i:Interaction.Triggers>
        </TextBox>

视图模型：

public DelegateCommand<object> MyCommand=>
      _myCommand ??= new DelegateCommand<object>(MyMethod);  

private void MyMethod(object myObject)
{
  //Do something
}

代码隐藏：

private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
   Keyboard.ClearFocus();
}