/// <summary>
/// Defines the method to be called when the command is invoked.
/// </summary>
/// <param name="parameter">Data used by the command.
/// If the command does not require data to be passed,
/// this object can be set to null.</param>
public virtual void Execute(object param)
{
// Invoke the executing command, allowing the command to be cancelled.
CancelCommandEventArgs args =
new CancelCommandEventArgs()
{
Parameter = param, Cancel = false
};
InvokeExecuting(args);
// If the event has been cancelled, bail now.
if (args.Cancel)
{
return;
}
// Call the action or the parameterized action, whichever has been set.
InvokeAction(param);
// Call the executed function.
InvokeExecuted(new CommandEventArgs()
{
Parameter = param
});
}
protected void InvokeExecuting(CancelCommandEventArgs args)
{
Executing?.Invoke(this, args);
}