<i:EventTrigger EventName="KeyDown"> <local:EventTriggerAction Command="{Binding KeyDownCMD}"></local:EventTriggerAction> </i:EventTrigger> </i:Interaction.Triggers> 源码:https://files.cnblogs.com/files/lizhijian/2021-01-04-WPF-CommandWithParameter.rar...
ShowInfoCommand = new CustomCommand(ShowInfo); } public void ShowInfo(object parameter) { MessageBox.Show(parameter as string); } } } 那么ShowInfo(object parameter)的参数从哪里来呢 -CommandParameter附加属性: <Window x:Class="WPFDemo.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xam...
ordViewSource.View.Refresh(); } private void DeleteOrderCommandHandler(object sender, ExecutedRoutedEventArgs e) { // Get the Order in the row in which the Delete button was clicked. Order obj = e.Parameter as Order; Delete_Order(obj); } 執行應用程式 若要開始偵錯,請...
Execute(object parameter):当调用此命令时,应执行的操作。 CanExecute(object parameter):如果可以执行Execute方法,则返回true;否则返回false。这可以用于启用或禁用控件,例如按钮。 CanExecuteChanged事件:当CanExecute的返回值可能发生更改时,应引发此事件。 ICommand的结构图如下所示: 代码如下所示: public interface IC...
publicinterfaceICommand{eventEventHandler?CanExecuteChanged;boolCanExecute(object?parameter);voidExecute(object?parameter);} 现在再来看看RelayCommand。 RelayCommand RelayCommand是一种常用于WPF和MVVM模式的设计模式,它是一种特殊的命令类型。在MVVM模式中,RelayCommand允许将命令的处理逻辑从视图模型中分离出来,使得视图模...
object parameter)=>Execute();protectedoverride boolCanExecute(object parameter)=>CanExecute();...
} #endregion // Constructors #region ICommand Members [DebuggerStepThrough] public bool CanExecute(object parameter) { return _canExecute == null ? true : _canExecute(parameter); } public event EventHandler CanExecuteChanged { add { CommandManager.RequerySuggested += value; } remove { CommandManag...
System.Globalization.CultureNotFoundException:'Only the invariant culture is supported in globalization-invariant mode. See https://aka.ms/GlobalizationInvariantMode for more information. (Parameter 'name') 原因是在 dotnet 6 设置了 InvariantGlobalization 为 true 之后,在调用CultureInfo.GetCultureInfoByIetf...
Figure 3 Simple App with Cut Command Toolbar Button To get this hooked up using events, you would need to define a Click handler for the toolbar button, and that code would need references to the two textboxes. You would have to determine which textbox has the focus and call appropriate...
Fix ZeroForNow parameter Remove sorcery for getting consistent names in the traces Explicit delegate types Update MSBuild tasks Improve Linux build Remove flacky and redundant codegen Austin Wise Fix setting DPI awareness Bastian Schmidt Fixing TextBoxView memory leak for 2 seconds after unloading host...