ClickCommandTrigger from MVVMLight EventToCommand TriggerAction

EventToCommandTrigger.cs

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Input;
using GalaSoft.MvvmLight.Command;

public class ClickCommandTrigger : System.Windows.Interactivity.EventTriggerBase<Button>
{
    /// <summary>
    /// The <see cref="Command" /> dependency property's name.
    /// </summary>
    public const string CommandPropertyName = "Command";

    /// <summary>
    /// Gets or sets the value of the <see cref="Command" />
    /// property. This is a dependency property.
    /// </summary>
    public ICommand Command
    {
        get
        {
            return (ICommand)GetValue(CommandProperty);
        }
        set
        {
            SetValue(CommandProperty, value);
        }
    }

    /// <summary>
    /// Identifies the <see cref="Command" /> dependency property.
    /// </summary>
    public static readonly DependencyProperty CommandProperty = DependencyProperty.Register(
        CommandPropertyName,
        typeof(ICommand),
        typeof(ClickCommandTrigger),
        new PropertyMetadata(null));

    /// <summary>
    /// The <see cref="CommandParameter" /> dependency property's name.
    /// </summary>
    public const string CommandParameterPropertyName = "CommandParameter";

    /// <summary>
    /// Gets or sets the value of the <see cref="CommandParameter" />
    /// property. This is a dependency property.
    /// </summary>
    public object CommandParameter
    {
        get
        {
            return (object)GetValue(CommandParameterProperty);
        }
        set
        {
            SetValue(CommandParameterProperty, value);
        }
    }

    /// <summary>
    /// Identifies the <see cref="CommandParameter" /> dependency property.
    /// </summary>
    public static readonly DependencyProperty CommandParameterProperty = DependencyProperty.Register(
        CommandParameterPropertyName,
        typeof(object),
        typeof(ClickCommandTrigger),
        new PropertyMetadata(null));

    private System.Windows.Interactivity.TriggerAction execAction;

    public ClickCommandTrigger()
        : base()
    { }

    protected override void OnEvent(EventArgs eventArgs)
    {
        if (execAction == null)
        {
            execAction = CreateExecAction();
            this.Actions.Add(execAction);
        }

        InvokeActions(eventArgs);
    }

    private System.Windows.Interactivity.TriggerAction CreateExecAction()
    {
        var act = new GalaSoft.MvvmLight.Command.EventToCommand();
            
        // Set the bindings for the command and parameter.
        var cmdBind = new Binding("Command") { Source = this };
        var parmBind = new Binding("CommandParameter") { Source = this };
        BindingOperations.SetBinding(act, EventToCommand.CommandProperty, cmdBind);
        BindingOperations.SetBinding(act, EventToCommand.CommandParameterProperty, parmBind);

        return act;
    }

    protected override string GetEventName()
    {
        return "Click";
    }
}