My name is Edward Tanguay. I'm an American software and web developer living and working in Berlin, Germany.
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WPF CODE EXAMPLE created on Thursday, March 05, 2009 permalink
How to create your own commands and bind them in WPF
This example shows how to create commands and bind them. You could see this as analogous to how this was done in WinForms, but actually it is looser than that, since you could use e.g. a test class to call the same commands to test that they are working correctly.
XAML:
<Window x:Class="TestCommands.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:TestCommands"
    Title="Window1" Height="300" Width="300">
    <Window.CommandBindings>
        <CommandBinding Command="{x:Static local:Window1.CommandOne}" Executed="CommandBinding_Executed"/>
        <CommandBinding Command="{x:Static local:Window1.CommandTwo}" Executed="CommandBinding_Executed"/>
        <CommandBinding Command="{x:Static local:Window1.CommandThree}" Executed="CommandBinding_Executed"/>
    </Window.CommandBindings>
    <Grid>
        <StackPanel Margin="10">
            <TextBlock x:Name="TheTextBlock" Text="make a choice below"/>
            <RadioButton GroupName="radioColor" IsChecked="True" Content="Blue" Command="{x:Static local:Window1.CommandOne}"/>
            <RadioButton GroupName="radioColor" IsChecked="False" Content="Red" Command="{x:Static local:Window1.CommandTwo}"/>
            <RadioButton GroupName="radioColor" IsChecked="False" Content="Green" Command="{x:Static local:Window1.CommandThree}"/>
            <Button Content="Change text to Red" Command="{x:Static local:Window1.CommandTwo}"/>
        </StackPanel>
        
    </Grid>
</Window>

code behind:
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;

namespace TestCommands
{
    public partial class Window1 : Window
    {
        public static readonly RoutedCommand CommandOne = new RoutedCommand();
        public static readonly RoutedCommand CommandTwo = new RoutedCommand();
        public static readonly RoutedCommand CommandThree = new RoutedCommand();

        public Window1()
        {
            InitializeComponent();
        }

        private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            if (e.Command == CommandOne)
            {
                TheTextBlock.Foreground = new SolidColorBrush(Colors.Blue);
            }
            else if (e.Command == CommandTwo)
            {
                TheTextBlock.Foreground = new SolidColorBrush(Colors.Red);
            }
            else if (e.Command == CommandThree)
            {
                TheTextBlock.Foreground = new SolidColorBrush(Colors.Green);
            }
        }

    }
}
need markup?
 

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