WPF基础入门-Class6-WPF通知更改

WPF基础入门

Class6-WPF通知

1、显示页面：

    <Grid><StackPanel><TextBox Text="{Binding Name}"></TextBox><TextBox Text="{Binding Title}"></TextBox><Button Command="{Binding ShowCommand}" Content="Show"></Button></StackPanel></Grid>

页面cs文件:

InitializeComponent();
this.DataContext = new WPF_Learn.Model.model_csdn();

2、新建一个ViewModelBase.cs文件

public class ViewModelBase : INotifyPropertyChanged{//实现接口public event PropertyChangedEventHandler? PropertyChanged;//public void OnPropertyChanged(string propertyName)//{//    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));//}// 自动获取调用者的属性名，默认空，不需要传递参数public void OnPropertyChanged([CallerMemberName] string propertyName = ""){PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));}}

3、model文件：其中定义的Name和Title与xaml文件中控件绑定一致

//继承ViewModelBase
class model_csdn : ViewModelBase{public model_csdn(){Name = "Ini_name";Title = "Ini_title";ShowCommand = new MyCommamd(show);}public MyCommamd ShowCommand { get; set; }public string name;public string title;public string Name{get { return name; }set{name = value;OnPropertyChanged();}}public string Title{get { return title; }set{title = value;OnPropertyChanged();}}public void show(){Name = "change name";Title = "change title";MessageBox.Show("change info");}}

运行效果：