WPF中通过MVVM模式来关闭View

一,场景

    通过单击按钮执行ViewModel中的Command来关闭窗体，项目引用Prism4架构及使用MVVM进行UI层的开发。

二, 实现代码(方式应该有很多种，现介绍两种我所想过的方式)

     (1).通过发布订阅事件来关闭窗体

     1.CodeBahind中的代码

  public partial class ApproveLoginView : Window

    {        

          [ImportingConstructor]         

          public ApproveLoginView()      

         {          

                  InitializeComponent();           

                  ServicesHelper.EventAggregator.GetEvent<CloseEvent>   ().Subscribe(CloseView);     

         }

        private void CloseView(object o)       

        {          

             if(o == DataContext)        

                    Close();           

        }     

}

     2.ViewModel部分代码

public class ApproveLoginViewModel : NotificationObject, 
    {
       
        private IEventAggregator _eventAggregator;

        [ImportingConstructor]
        public ApproveLoginViewModel(IEventAggregator eventAggregator)
        {
            _eventAggregator = eventAggregator;
        }

        #region Command

        private ICommand _okCommand;
        public ICommand OkCommand
        {
            get
            {
                if (_okCommand == null)
                {
                    _okCommand = new RelayCommand(Ok);
                }
                return _okCommand;
            }
            private set { }
        }

       
        private void Ok()
        {
            _eventAggregator.GetEvent<CloseEvent>().Publish(this);
        }

        
        #endregion
    }

     （2).通过Prism的interactionRequest来实现

       1.Window中的Xaml部分代码

<Window x:Class="MVVMCloseView.MainWindow"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
     xmlns:v="http://schemas.microsoft.com/expression/2010/interactions"
     xmlns:prism="http://www.codeplex.com/prism"
        Title="MainWindow" Height="350" Width="525" x:Name="window">
    <i:Interaction.Triggers>
         <prism:InteractionRequestTrigger SourceObject="{Binding   CloseRequest}">
              <v:CallMethodAction MethodName="Close" TargetObject="{Binding ElementName=window}"/>
        </prism:InteractionRequestTrigger>
    </i:Interaction.Triggers>
    <Grid>
            <Button Content="Close" Grid.Row="1" FontSize="30" Width="200" Height="100" Command="{Binding CloseCommand}"/>
    </Grid>
</Window>

       2.ViewModel中的部分代码
 

 public class MainWindowViewModel : NotificationObject
    {
        public MainWindowViewModel()
        {
            this.CloseCommand = new DelegateCommand(new Action(Close));
            this.CloseRequest = new InteractionRequest<Notification>();
        }

        public DelegateCommand CloseCommand { get; set; }

        private void Close()
        {
            this.CloseRequest.Raise(new Notification() );
        }

        public InteractionRequest<Notification> CloseRequest { get; set; }
    }

好了，就说到这了，因为自己在通过ViewModel来关闭view碰到些问题，上网找了些资料后找到这些解决方法的，希望对有需要的朋友能有帮助。