C#: 根据事件名称动态添加事件

public static void BindCmdWithEventSrc(object eventSrc, string eventName, ICmd cmd)
{
    Action act = delegate
    {
    if (cmd != null)
    {
        cmd.Execute();
    }
    };

    EventInfo ei = eventSrc.GetType().GetEvent(eventName);
    var handlerType = ei.EventHandlerType;
    var eventParams = handlerType.GetMethod("Invoke").GetParameters();
    //lambda: (object x0, EventArgs x1) => d()       
    var parameters = eventParams.Select(p => Expression.Parameter(p.ParameterType, "x"));
    // - assumes void method with no arguments but can be         
    //   changed to accomodate any supplied method       
    var body = Expression.Call(Expression.Constant(act), act.GetType().GetMethod("Invoke"));
    var lambda = Expression.Lambda(body, parameters.ToArray());

    var del = Delegate.CreateDelegate(handlerType, lambda.Compile(), "Invoke", false);
    ei.AddEventHandler(eventSrc, del);
}

public static void BindCmdWithEventSrc(object[,] bindings)
{
    // bind control and command 
    for (int i = 0; i < bindings.GetLength(0); i++)
    {
    object eventSrc = bindings[i, 0];
    string eventName = bindings[i, 1] as string;
    ICmd cmd = bindings[i, 2] as ICmd;

    BindCmdWithEventSrc(eventSrc, eventName, cmd);
    }
}