本系列文章导航
- https://www.cnblogs.com/aierong/p/17300066.html
https://github.com/aierong/WpfDemo (自我Demo地址)
希望提到的知识对您有所提示,同时欢迎交流和指正
作者:aierong
出处:https://www.cnblogs.com/aierong
说明
CommunityToolkit.Mvvm包不提供ioc功能,但是官方建议使用:Microsoft.Extensions.DependencyInjection使用IOC
安装
nuget：Microsoft.Extensions.DependencyInjection 包
接口和服务的定义实现
public interface IBill
{
bool IsExistId ( string name );
string GetData ( string name );
}public class BillService : IBill
{
public string GetData ( string name )
{
return string.Format( "name:{0}" , name );
}
public bool IsExistId ( string name )
{
return name == "qq";
}
}App.xaml.cs注册
public partial class App : Application
{
/// <summary>
/// Gets the current <see cref="App"/> instance in use
/// </summary>
public new static App Current => ( App ) Application.Current;
/// <summary>
/// Gets the <see cref="IServiceProvider"/> instance to resolve application services.
/// </summary>
public IServiceProvider Services
{
get;
}
public App ()
{
Services = ConfigureServices();
this.InitializeComponent();
}
private static IServiceProvider ConfigureServices ()
{
var services = new ServiceCollection();
// 注册Services
services.AddSingleton<IOCDemo.Service.Repository.IBill , IOCDemo.Service.Repository.BillService>();
services.AddSingleton<IOCDemo.Service.Service.IBill , IOCDemo.Service.Service.BillService>();
//services.AddSingleton<ISettingsService , SettingsService>();
// 注册Viewmodels
// 不是每个Viewmodels都得来AddTransient,如果Viewmodels不需要ioc,可以不用这里注册
services.AddTransient<IOCDemo.ViewModels.WindowViewModel1>();
return services.BuildServiceProvider();
}
}view中使用
原有的view与viewmodel的绑定方式改变如下：
public partial class Window1 : Window
{
public Window1 ()
{
InitializeComponent();
// this.DataContext = new WindowViewModel1(); 这样不可以使用了,请用App.Current.Services.GetService
this.DataContext = App.Current.Services.GetService<WindowViewModel1>();
//代码任何处,都可以使用App.Current.Services.GetService获取到服务
//IFilesService filesService = App.Current.Services.GetService<IFilesService>();
}
}viewmodel中使用
vm的构造函数中注入服务即可
readonly Service.Service.IBill _IBill;
public WindowViewModel1 ( Service.Service.IBill iBill )
{
this._IBill = iBill;
}
[RelayCommand( CanExecute = nameof( CanButton ) )]
void ButtonClick ()
{
//点击按钮,修改标题
if ( this._IBill.IsExistId( Title ) )
{
Title = "qq" + this._IBill.GetData( Title );
}
else
{
Title = "qq";
}
}代码中获取服务的方式
this.DataContext = App.Current.Services.GetService<WindowViewModel1>();
//代码任何处,都可以使用App.Current.Services.GetService获取到服务
IFilesService filesService = App.Current.Services.GetService<IFilesService>();自我Demo地址:
https://github.com/aierong/WpfDemo/tree/main/WpfDemoNet6/IOCDemo
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