Wpf Prism中添加新控件的区域适配器

上节中我们讲了怎么样定义一个区域与区域引用视图，但并不是所有的组件都支持组件当作区域使用，比如StackPanel就不支持当作区域来使用：

我们自接使用会报以下错误，这时候我们就要自定义一个区域适配器：

 1.首先我们创建一个StackPanelRegionAdapter的类：

 1 using Prism.Regions;
 2 using System.Windows;
 3 using System.Windows.Controls;
 4 
 5 namespace MyTest
 6 {
 7     public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
 8     {
 9         public StackPanelRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
10             : base(regionBehaviorFactory)
11         {
12         }
13 
14         protected override void Adapt(IRegion region, StackPanel regionTarget)
15         {
16             region.Views.CollectionChanged += (s, e) => 
17             {
18                if (e.Action==System.Collections.Specialized.NotifyCollectionChangedAction.Add)
19                 {
20                     foreach (FrameworkElement view in e.NewItems) 
21                         {
22                         regionTarget.Children.Add(view);
23                         }
24                 }
25             };
26         }
27 
28         protected override IRegion CreateRegion()
29         {
30             return new Region();
31         }
32     }
33 }
View Code

2.修改MainWindow.xaml为StackPanel作为Region的容器：

 3.我们需要在app中注册定义的StackPanelRegionAdapter

 1 using Prism.Ioc;
 2 using Prism.Regions;
 3 using System.Windows;
 4 using System.Windows.Controls;
 5 
 6 namespace MyTest
 7 {
 8     /// <summary>
 9     /// Interaction logic for App.xaml
10     /// </summary>
11     public partial class App
12     {
13         protected override Window CreateShell()
14         {
15             return Container.Resolve<MainWindow>();
16         }
17 
18         protected override void RegisterTypes(IContainerRegistry containerRegistry)
19         {
20 
21         }
22         protected override void ConfigureRegionAdapterMappings(RegionAdapterMappings regionAdapterMappings)
23         {
24             base.ConfigureRegionAdapterMappings(regionAdapterMappings);
25             regionAdapterMappings.RegisterMapping(typeof(StackPanel)
26                 , Container.Resolve<StackPanelRegionAdapter>());
27 
28         }
29     }   
30 }
View Code

4.修改MainWindowViewModel中绑定的名字：

 1 using Prism.Mvvm;
 2 using Prism.Regions;
 3 
 4 namespace MyTest
 5 {
 6     public class MainWindowViewModel:BindableBase
 7     {
 8 
 9         private string _title = "hello";
10         public string Title
11         {
12             get { return _title; }
13             set { SetProperty(ref _title, value); }
14         }
15 
16         private readonly IRegionManager regionManager;
17         
18 
19         public MainWindowViewModel(IRegionManager regionManager) 
20         {
21             this.regionManager = regionManager;
22             regionManager.RegisterViewWithRegion("stackRegion", typeof(ViewA));
23 
24         }        
25 
26     }
27 }
View Code

启动项目，我们就可以将StackPanel作为容器使用了：

 

posted @ 2024-12-21 19:59  小码哥-风云  阅读(2)  评论(0)  编辑  收藏  举报