<Button Command="ApplicationCommands.Open"CommandManager.Executed="Button_Executed"CommandManager.CanExecute="Button_CanExecute"Content="{Binding RelativeSource={RelativeSource Self},Path=Command.Text}"/>privateboolflag =true;privatevoidButton_Executed(objectsender, ExecutedRoutedEventArgs e) { MessageBox.Show(...
privatevoidTextBox_OnLostFocus(object sender,RoutedEventArgs e){Dispatcher.InvokeAsync(((UIElement)sender).Focus);} 此时运行代码,点击文本,可以看到输出窗口输出 林德熙是逗比 然后点击文本,输入文字,然后点击按钮,可以发现按钮的命令没有触发 在命令的 CanExecute 打上断点,可以发现连 CanExecute 都没有进入 如果...
将 Button 用作命令源。 XAML 复制 <Button Command="ApplicationCommands.Open" Name="MyButton" Height="50" Width="200"> Open (KeyBindings: Ctrl+R, Ctrl+0) </Button> C# 复制 // Button used to invoke the command Button CommandButton = new Button(); CommandButton.Command...
.Invoke(this, new PropertyChangedEventArgs(name)); } public MainViewModel() { Name = "狗熊岭第一狙击手"; ShowInfoCommand = new CustomCommand(ShowInfo); } public void ShowInfo() { Name = "光头强"; MessageBox.Show("You click me."); } } } 💭nameof(Name)是C# 6.0 引入的一个语法糖,它...
public class SampleViewModel : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } private string name = String.Empty; pub...
boolcanExecute){this._action=action;this._canExecute=canExecute;}publiceventEventHandlerCanExecuteChanged;publicvoidOnCanExecuteChanged(){CanExecuteChanged?.Invoke(this,EventArgs.Empty);}publicboolCanExecute(objectparameter){returnthis._canExecute;}publicvoidExecute(objectparameter){this._action.Invoke(parameter)...
invokeProv.Invoke(); 1. 2. 3. 方法二 someButton.RaiseEvent(new RoutedEventArgs(ButtonBase.ClickEvent)); 1. 然而似乎并不适用CheckBox的情况,所以使用下面的办法直接触发Command。 2. 代码触发绑定的Command someButton.Command.Execute(someButton.CommandParameter); ...
Create a Command in a UserControl Create a custom contorl like DataGrid in WPF Create a simple wpf trigger on one object that affects another Create DataGrid.Columns from code behind using WPF Create New Row in WPF DataGrid? Create picture from Video Create pop up control on button click in...
publicclassSampleViewModel:INotifyPropertyChanged{publiceventPropertyChangedEventHandler PropertyChanged;privatevoidNotifyPropertyChanged([CallerMemberName] String propertyName =""){PropertyChanged?.Invoke(this,newPropertyChangedEventArgs(propertyName));}privatestringname = String.Empty;publicstringName{get{returnname;}se...
remove { CommandManager.RequerySuggested += value; } } public Func<object,bool> DoCanExecute { get; set; } public bool CanExecute(object? parameter) { return DoCanExecute?.Invoke(parameter) == true; } public void Execute(object? parameter) ...