12、ViewModelLocator-Prism的MVVM,可以关联View 和ViewModel

　　1、将App.xaml中的StartupUri="MainWindow.xaml"删除。

　　2、使用NuGet安装Prism.Wpf、Prism.Core、Prism.Unity。

　　3、添加类“Bootstrapper”，编辑如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using Microsoft.Practices.Unity;
using Prism.Mvvm;
using Prism.Unity;
using ViewModelCustom.ViewModel;
using ViewModelCustom.Views;

namespace ViewModelCustom
{
    class BootStarpper:UnityBootstrapper
    {
        protected override DependencyObject CreateShell()
        {
            return Container.Resolve<MainWindow>();
        }

        protected override void InitializeShell()
        {
            Application.Current.MainWindow.Show();
        }

        protected override void ConfigureViewModelLocator()
        {
            base.ConfigureViewModelLocator();

            ViewModelLocationProvider.Register<MainWindow,CustomViewModel>();
        }
    }
}

 

　　4、创建文件夹Views，将MainWindow.xaml移动到此文件夹中。创建文件夹ViewModels，新建类MainWindowViewModel.cs。注意：VM类的名称一定是V+“ViewModel”，例如MainWindow+“ViewModel”。

　　　　

 1 <Window x:Class="ViewModelLocator.Views.MainWindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 5         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 6         xmlns:local="clr-namespace:ViewModelLocator"
 7         xmlns:prism="http://prismlibrary.com/"
 8         prism:ViewModelLocator.AutoWireViewModel="True"
 9         mc:Ignorable="d"
10         Title="{Binding Title}" Height="350" Width="525">
11     <Grid>
12         
13     </Grid>
14 </Window>

 1 using Prism.Mvvm;
 2 
 3 namespace ViewModelLocator.ViewModels
 4 {
 5     class MainWindowViewModel:BindableBase
 6     {
 7         private string _title = "Prism Unity Application";
 8 
 9         public string Title
10         {
11             get { return _title; }
12             set { SetProperty(ref _title, value); }
13         }
14     }
15 }

　　5、修改App.xaml

 1 using System.Collections.Generic;
 2 using System.Configuration;
 3 using System.Data;
 4 using System.Linq;
 5 using System.Threading.Tasks;
 6 using System.Windows;
 7 
 8 namespace BootstrapperShell
 9 {
10     /// <summary>
11     /// App.xaml 的交互逻辑
12     /// </summary>
13     public partial class App : Application
14     {
15         protected override void OnStartup(StartupEventArgs e)
16         {
17             base.OnStartup(e);
18 
19             var bootstrapper = new Bootstrapper();
20             bootstrapper.Run();
21         }
22     }
23 }

 　　6、最终结果：