95 lines
2.8 KiB
C#
95 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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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.Navigation;
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using System.Windows.Shapes;
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namespace Example
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{
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/// <summary>
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/// Interaction logic for MainWindow.xaml
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/// </summary>
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public partial class MainWindow : Window
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{
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public MainWindow()
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{
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InitializeComponent();
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CommandBinding cbinding = new CommandBinding(MainWindow.GetButtonContentCmd);
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cbinding.Executed += Cbinding_Executed;
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cbinding.CanExecute += Cbinding_CanExecute;
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this.CommandBindings.Add(cbinding);
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this.textCommand.OnCanExecute = (obj) => true;
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this.textCommand.OnExecute += TextCommand_OnExecute;
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this.butCustom.Command = this.textCommand;
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}
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private void TextCommand_OnExecute(object? obj)
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{
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MessageBox.Show("自这义命令被调用！");
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}
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private void Cbinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
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{
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e.CanExecute = true;
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}
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private void Cbinding_Executed(object sender, ExecutedRoutedEventArgs e)
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{
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MessageBox.Show(e.Source.ToString());
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}
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public static RoutedCommand GetButtonContentCmd = new RoutedCommand();
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public CustomCommand textCommand = new CustomCommand();
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public class CustomCommand : ICommand
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{
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public string? Command { get; set; }
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public CustomCommand() { }
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public CustomCommand(string command, Action<object?>? onExecute = null, Func<object?, bool>? onCanExecute = null)
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{
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this.Command = command;
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this.OnExecute = onExecute;
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this.OnCanExecute = onCanExecute;
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}
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public event EventHandler? CanExecuteChanged;
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public event Action<object?>? OnExecute;
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public Func<object?, bool>? OnCanExecute;
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public bool CanExecute(object? parameter)
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{
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if (this.OnCanExecute != null) return this.OnCanExecute(parameter);
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else if (this.Execute != null) return true;
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else
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{
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this.CanExecuteChanged?.Invoke(this, new EventArgs());
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return false;
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}
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}
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public void Execute(object? parameter)
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{
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this.OnExecute?.Invoke(parameter);
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}
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}
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private void Button_Click(object sender, RoutedEventArgs e)
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{
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new CustomWindow().Show();
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}
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}
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}
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