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53 lines
1.3 KiB
C#
53 lines
1.3 KiB
C#
Command Enabling
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<Window x:Class="WpfApplication1.Window1"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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Title="CommandEnabling" Height="400" Width="400"
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>
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<Grid>
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<Menu VerticalAlignment="Top">
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<MenuItem Header="_Edit">
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<MenuItem Command="Redo" />
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</MenuItem>
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</Menu>
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</Grid>
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</Window>
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//File:Window.xaml.cs
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Shapes;
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namespace WpfApplication1
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{
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public partial class Window1 : System.Windows.Window
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{
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public Window1()
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{
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InitializeComponent();
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CommandBinding redoCommandBinding = new CommandBinding(ApplicationCommands.Redo);
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redoCommandBinding.CanExecute += RedoCommandCanExecute;
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CommandBindings.Add(redoCommandBinding);
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}
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void RedoCommandCanExecute(object sender, CanExecuteRoutedEventArgs e)
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{
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e.CanExecute = DateTime.Now.Second % 2 > 1;
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}
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}
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}
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