有一个比较重要的点就是，继承INotifyPropertyChanged，并实现OnPropertyChanged。
viewModel实现代码如下：
public class MainWindowViewModel:INotifyPropertyChanged
{
private bool _isBinding = false;
public bool IsBinding
{
get
{
return _isBinding;
}
set
{
this._isBinding = value;
OnPropertyChanged("IsBinding");
// 通知UI界面更新绑定BindingText值的控件进行数据更新
OnPropertyChanged("BindingText");
}
}
public string BindingText
{
get
{
return this.IsBinding ? "绑定" : "空闲";
}
}
private string _bindingName="MyBindingName";
public string BindName
{
get
{
return _bindingName;
}
set
{
this._bindingName = value;
OnPropertyChanged("BindName");
}
}
public event PropertyChangedEventHandler? PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
窗体后台代码如下：
public partial class MainWindow : Window
{
public MainWindowViewModel ViewModel { get; set; } = new MainWindowViewModel();
public MainWindow()
{
InitializeComponent();
this.DataContext = ViewModel;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
this.ViewModel.BindName = "更改";
}
}
xaml前端代码如下：
<StackPanel>
<TextBlock Text="{Binding BindName}" Height="30" Width="220" Background="Aquamarine" />
<ToggleButton x:Name="MySwitch" IsChecked="{Binding IsBinding}" Content="OFF" HorizontalAlignment="Left" VerticalAlignment="Top" Width="100" Height="50" Style="{StaticResource SwitchStyle}"/>
<Button Content="Button" Height="55" Click="Button_Click"/>
</StackPanel>
单击按钮发现值随之更改！！！
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