项目URL：http://www.mvvmlight.net/
一、安装MVVMLight
在NuGet程序包中搜索MVVMLight，然后安装。
二、使用
安装完MVVMLight后项目中会自动生成ViewModel目录，并且目录中会生成ViewModelLocator.cs文件
App.xaml会自动添加代码，注册全局变量Locator
建立Model目录放置model类，View目录放置view类
在Model下添加PeopleModel.cs，继承ObservableObject类，ObservableObject实现了INotifyPropertyChanged接口，所有PeopleModel的属性改变可以通知控件绑定属性
public class PeopleModel : ObservableObject
{
private string name = "";
public string Name { get => name; set => Set(ref name, value); }
}在ViewModel下添加PeopleViewModel.cs，继承ViewModelBase类，ViewModelBase类继承ObservableObject类
public class PeopleViewModel : ViewModelBase
{
private PeopleModel people = new PeopleModel();
public PeopleModel People { get => people; set => Set(ref people, value); }
//不带参数命令
public ICommand CmdUpdateName
{
get
{
return new RelayCommand(new Action(() =>
{
People.Name = "无参数";
}));
}
}
//带参数命令
public ICommand CmdUpdateName1
{
get
{
return new RelayCommand在ViewModelLocator.cs里注册PeopleViewModel元素
///
/// This class contains static references to all the view models in the
/// application and provides an entry point for the bindings.
///
public class ViewModelLocator
{
///
/// Initializes a new instance of the ViewModelLocator class.
///
public ViewModelLocator()
{
ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);
////if (ViewModelBase.IsInDesignModeStatic)
////{
//// // Create design time view services and models
//// SimpleIoc.Default.Register();
////}
////else
////{
//// // Create run time view services and models
//// SimpleIoc.Default.Register();
////}
SimpleIoc.Default.Register();
SimpleIoc.Default.Register();
}
public MainViewModel Main
{
get
{
return ServiceLocator.Current.GetInstance();
}
}
public PeopleViewModel PeopleVM
{
get
{
return ServiceLocator.Current.GetInstance();
}
}
public static void Cleanup()
{
// TODO Clear the ViewModels
}
} 在View目录下添加PeopleWindow窗体，并给window的DataContext属性绑定PeopleVM元素
DataContext="{Binding Source={StaticResource Locator}, Path=PeopleVM}">
界面效果：
（1）点击无参数按钮：
（2）点击有参数按钮
参考：
https://www.cnblogs.com/manupstairs/p/4890300.html 里面有对MVVMLight比较详细的解释