Prism框架的Regions使用

Prism框架的Regions，能夠把用戶控件、窗體等附加到主窗體指定的控件中。

【實戰1】

一、新建Prism Blank App(WPF) 項目：Demo0810

Views文件夾處，鼠標右鍵——添加——新建項——Prism——Prism UserControl(WPF)，名稱默認

MainWindow.xaml.cs代碼：

using System.Windows; using Prism.Regions; //引入Regions

namespace Demo0810.Views { public partial class MainWindow : Window { public MainWindow(IRegionManager regionManager) //定義變量
 { InitializeComponent(); //將PrismUserControl1用戶控件加載到主窗體的ContenRegion控件中
            regionManager.RegisterViewWithRegion("ContentRegion", typeof(PrismUserControl1)); ////或者
            //PrismUserControl1 viewA = new PrismUserControl1(); //new出一個類的對象 //_regionManager.AddToRegion("ContentRegion", viewA);
 } } }

PrismUserControl1.xaml代碼：其餘文件原封不動

<UserControl x:Class="Demo0810.PrismUserControl1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:prism="http://prismlibrary.com/" prism:ViewModelLocator.AutoWireViewModel="True">
    <Grid>
        <TextBlock Text="View A" FontSize="38" />
    </Grid>
</UserControl>

 或者MainWindow.xaml.cs不更改（保持極簡純粹），更改MainWindowViewModel.cs的代碼：推薦

using Prism.Mvvm; using Prism.Regions; //引入Regions

namespace Demo0810.ViewModels { public class MainWindowViewModel : BindableBase { private string _title = "Prism Application"; public string Title { get { return _title; } set { SetProperty(ref _title, value); } } public MainWindowViewModel(RegionManager regionManager) //定義變量
 { //將PrismUserControl1用戶控件加載到主窗體的ContenRegion控件中
            regionManager.RegisterViewWithRegion("ContentRegion", typeof(PrismUserControl1)); ////或者
            //PrismUserControl1 viewA = new PrismUserControl1(); //new出一個類的對象 //_regionManager.AddToRegion("ContentRegion", viewA);
 } } }

 【實戰2】仿照實戰1新建項目Demo0810一、添加用戶控件PrismUserControl1.cs

主窗體界面前端代碼MainWindow.xaml：

<Window x:Class="Demo08101.Views.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:prism="http://prismlibrary.com/" prism:ViewModelLocator.AutoWireViewModel="True" Title="{Binding Title}" Height="350" Width="525">
    <DockPanel LastChildFill="True">
        <Button Command="{Binding ShowCommand}" DockPanel.Dock="Top" >Add View</Button>
        <ContentControl prism:RegionManager.RegionName="ContentRegion" />
    </DockPanel>
</Window>

MainWindowViewModel.cs代碼：其餘文件原封不動

using System; using Prism.Mvvm; using Prism.Commands; using Prism.Regions; using Demo08101.Views; namespace Demo08101.ViewModels { public class MainWindowViewModel : BindableBase { private string _title = "Prism Application"; public string Title //數據屬性
 { get { return _title; } set { SetProperty(ref _title, value); } } public DelegateCommand ShowCommand { get; set; } //命令屬性
 IRegionManager _regionManager; //定義變量
        public void Show() //方法，展現用戶控件到指定的主窗體控件中
 { _regionManager.RegisterViewWithRegion("ContentRegion", typeof(PrismUserControl1)); ////或者
            //PrismUserControl1 viewA = new PrismUserControl1(); //new出一個類的對象 //_regionManager.AddToRegion("ContentRegion", viewA);
 } public MainWindowViewModel(IRegionManager regionManager) { _regionManager = regionManager; //賦值
            this.ShowCommand = new DelegateCommand(new Action(Show)); //命令屬性關聯方法
 } } }