我在XAML中有一个滑块，我想将“Thumb.DragCompleted”事件处理程序绑定到我在ViewModel中定义的命令。代码如下：

<Slider Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" Maximum="100" TickFrequency="100"
                    Value="{Binding ExposureTime}" Thumb.DragCompleted="SliderDragCompleted">
                <i:Interaction.Triggers>
                    <i:EventTrigger EventName="Thumb.DragCompleted">
                        <i:InvokeCommandAction x:Name="SliderCompleted" Command="{Binding SetExposureCommand}"></i:InvokeCommandAction>
                    </i:EventTrigger>
                </i:Interaction.Triggers>
                
            </Slider>

下面是viewModel中的函数：

public ICommand SetExposureCommand => _setExposure ?? (_setExposure = new CommonCore.GuiControls.Commands.RelayCommand(SetExposure));

   public void SexExposure()
   {
      vimbaCamera.SetExposure(ExposureTime);
   }

但该函数从未被调用。任何帮助将不胜感激。