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

 1   public partial class ApproveLoginView : Window
 2 
 3     {        
 4 
 5           [ImportingConstructor]         
 6 
 7           public ApproveLoginView()      
 8 
 9          {          
10 
11                   InitializeComponent();           
12 
13                   ServicesHelper.EventAggregator.GetEvent<CloseEvent>   ().Subscribe(CloseView);     
14 
15          }
16 
17         private void CloseView(object o)       
18 
19         {          
20 
21              if(o == DataContext)        
22 
23                     Close();           
24 
25         }     
26 
27 }

View Code

2.ViewModel部分代码

 1 public class ApproveLoginViewModel : NotificationObject, 
 2     {
 3        
 4         private IEventAggregator _eventAggregator;
 5 
 6         [ImportingConstructor]
 7         public ApproveLoginViewModel(IEventAggregator eventAggregator)
 8         {
 9             _eventAggregator = eventAggregator;
10         }
11 
12         #region Command
13 
14         private ICommand _okCommand;
15         public ICommand OkCommand
16         {
17             get
18             {
19                 if (_okCommand == null)
20                 {
21                     _okCommand = new RelayCommand(Ok);
22                 }
23                 return _okCommand;
24             }
25             private set { }
26         }
27 
28        
29         private void Ok()
30         {
31             _eventAggregator.GetEvent<CloseEvent>().Publish(this);
32         }
33 
34         
35         #endregion
36     }

View Code

（2).通过Prism的interactionRequest来实现

1.Window中的Xaml部分代码

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

View Code

2.ViewModel中的部分代码

 1  public class MainWindowViewModel : NotificationObject
 2     {
 3         public MainWindowViewModel()
 4         {
 5             this.CloseCommand = new DelegateCommand(new Action(Close));
 6             this.CloseRequest = new InteractionRequest<Notification>();
 7         }
 8 
 9         public DelegateCommand CloseCommand { get; set; }
10 
11         private void Close()
12         {
13             this.CloseRequest.Raise(new Notification() );
14         }
15 
16         public InteractionRequest<Notification> CloseRequest { get; set; }
17     }

View Code

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。