Help command : Command « Windows Presentation Foundation « C# / C Sharp

1. C# / C Sharp
2. Windows Presentation Foundation
3. Command

Help command

  

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="AboutDialog"
        Title="About WPF Unleashed" SizeToContent="WidthAndHeight"
        Background="OrangeRed">
  <Window.CommandBindings>
    <CommandBinding Command="Help" CanExecute="HelpCanExecute" Executed="HelpExecuted"/>
  </Window.CommandBindings>
  <StackPanel>
    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
      <Button MinWidth="75" Margin="10" Command="Help" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"/>
      <Button MinWidth="75" Margin="10">OK</Button>
    </StackPanel>
    <StatusBar>asdf</StatusBar>
  </StackPanel>
</Window>

//File:Window.xaml.cs

using System.Windows;
using System.Windows.Input;

public partial class AboutDialog : Window
{
    public AboutDialog()
    {
        InitializeComponent();
    }

    void HelpCanExecute(object sender, CanExecuteRoutedEventArgs e)
    {
        e.CanExecute = true;
    }
    
    void HelpExecuted(object sender, ExecutedRoutedEventArgs e)
    {
        System.Diagnostics.Process.Start("http://www.java2s.com");
    }
}

   
    
  

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6.	Command Handler Key Binding
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8.	Command Enabling
9.	Using CommandBinding and ExecutedRoutedEventHandler to bind Application event to an event handler method
10.	Create CommandBindings in Xaml and bind to Button
11.	Bind TextBox save command to CommandBinding
12.	Use TextBox.CommandBindingst to bind command
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