1 public partial class DataViewModel2 : ObservableObject
2 {
3 
4 }

1 /*
2 [ObservableProperty]标记后,会自动生成属性(大写命名),例如:下面会自动生成Title
3 
4 注意:这个私有变量命名:必须是小写开头,或者下划线,或者m_
5 */
6 
7 [ObservableProperty]
8 private string title = "hello";

 1 public string Caption
 2 {
 3     get
 4     {
 5         return string.Format( "Title:{0}-{1}" , Title , LastName );
 6     }
 7 }
 8 
 9 
10 [ObservableProperty]
11 [NotifyPropertyChangedFor( nameof( Caption ) )]
12 private string lastName = "abc";

1 /*
2         [NotifyCanExecuteChangedFor( nameof( ButtonClickCommand ) )]
3 NotifyCanExecuteChangedFor是通知依赖命令(触发命令),相当于set中ButtonClickCommand.NotifyCanExecuteChanged();
4 */
5 
6 [ObservableProperty]
7 [NotifyCanExecuteChangedFor( nameof( ButtonClickCommand ) )]
8 private bool isEnabled = false;

 1 /*
 2 RelayCommand是定义命令,自动生成的命令名是方法名+Command,并且初始化
 3 例如:下面的会自动生成ButtonClickCommand
 4 
 5 CanExecute是指定一个判断方法,判断是否可用
 6 */
 7 
 8 [RelayCommand( CanExecute = nameof( CanButton ) )]
 9 void ButtonClick ()
10 {
11     //点击按钮,修改标题
12     Title = "hello(改)";
13 }
14 
15 bool CanButton ()
16 {
17     return IsEnabled;
18 }

 1 [RelayCommand]
 2 async Task AsyncButtonClick ()
 3 {
 4     await Task.Delay( 4800 );
 5     Title = "hello(Task改)";
 6 }
 7 
 8 
 9 
10 [RelayCommand]
11 async Task AsyncButtonParClick ( double val )
12 {
13     await Task.Delay( 4800 );
14     Title = $"hello(Task改):{val}";
15 }