(04).NET MAUI实战 MVVM

<Grid RowDefinitions="500,50">
   <ListView ItemsSource="{Binding Temps}"/>
     <StackLayout Grid.Row="1">
        <Button WidthRequest="100" HeightRequest="25" Text="add" Command="{Binding AddCommand}"/>
        <Button WidthRequest="100" HeightRequest="25" Text="add" Command="{Binding DeleteCommand}"/>
     </StackLayout>
</Grid>

    //ViewModel需继承
    public class MainViewModel : ObservableObject
    {
        private string _test;
        private ObservableCollection<MainModel> _temps;
        private ICommand addCommand;
        private ICommand deleteCommand;

        //数据通知集合
        public ObservableCollection<MainModel> Temps { get => _temps; set => _temps = value; }

        //命令
        public ICommand AddCommand { get => addCommand ?? (addCommand = new RelayCommand(AddCallback));}
        public ICommand DeleteCommand { get => deleteCommand ?? (deleteCommand = new RelayCommand(DeleteCallback));  }

        //数据通知字段
        public string Test { get => _test; set => SetProperty(ref _test , value); }

        public MainViewModel() 
        {
            //初始化
            Temps = new ObservableCollection<MainModel>();
            Temps.Add(new MainModel { Name = "zhangsan" });
            Temps.Add(new MainModel { Name = "zhangsan" });
        }

        //命令执行内容
        private void AddCallback()
        {
            Temps.Add(new MainModel { Name = DateTime.Now.ToString() });
        }

        private void DeleteCallback()
        {
            Temps.RemoveAt(0);
        }
    }

public class MainModel
{
    public string Name { get; set; }

    public override string ToString()
    {
        return Name;
    }
}