WPF 通过CommandBinding捕获命令

RoutedCommand与业务逻辑无关，业务逻辑是通过CommandBinding来实现

using System;

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Wpf180706
{
/// <summary>
/// Interaction logic for Window4.xaml
/// </summary>
public partial class Window4 : Window
{
public Window4()
{
InitializeComponent();
InitializeCommond();
}

private RoutedCommand clearCmd = new RoutedCommand("Clear", typeof(Window));

private void InitializeCommond()
{
this.btn.Command = clearCmd;
clearCmd.InputGestures.Add(new KeyGesture(Key.C,ModifierKeys.Alt));
//this.btn.CommandTarget = txt;目标可以指定也可以由WPF根据焦点判断
CommandBinding cb = new CommandBinding();
cb.Command = clearCmd;
cb.Executed += cb_Executed;
cb.CanExecute += cb_CanExecute;
this.CommandBindings.Add(cb);

}

void cb_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
if (string.IsNullOrEmpty(txt.Text))
{
e.CanExecute = false;
}
else
{
e.CanExecute = true;
}

}

void cb_Executed(object sender, ExecutedRoutedEventArgs e)
{

txt.Clear();
e.Handled = true;
}
}
}

巴特西

WPF 通过CommandBinding捕获命令

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