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Breaking handler chain

You can abort the command chain by setting the CancelPropagation property to true.

  Program.Commands.Add(typeof(YourCommand), OnYourCommand);
  Program.Commands.Add(typeof(YourCommand), OnYourCommand2);

  Program.Commands.Invoke(new YourCommand());

  public bool OnYourCommand(object source, Command command)
    command.CancelPropagation = true;
    return true;

  public bool OnYourCommand2(object source, Command command)
    //will never be invoked.

You can also determine which handlers are allowed to break the chain, check the PropagationCancelled in the CommandManager.

Last edited Aug 25, 2008 at 6:01 PM by jgauffin, version 3


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