防止调用下一个事件处理程序

问题描述

我有两个事件处理程序连接到 Windows 窗体中的按钮单击，如下所示:

I have two event handlers wired up to a button click in a Windows form like so:

this.BtnCreate.Click += new System.EventHandler(new RdlcCreator().FirstHandler);
this.BtnCreate.Click += new System.EventHandler(this.BtnCreate_Click);

两者都被正确调用.

但是，是否可以在 FirstHandler() 中阻止 BtnCreate_Click() 被执行?比如:

However is it possible within FirstHandler() to prevent BtnCreate_Click() being executed? Something like:

void FirstHandler(object sender, EventArgs e)
{
   if (ConditionSatisfied)
     //Prevent next handler in sequence being executed

}

我知道我可以取消订阅该事件，但这可以通过编程方式(在方法内)完成吗?

I know I could just unsubscribe the event, but can this be done programmatically (from within the method)?

推荐答案

据我所知，没有解决方案.这是因为无法保证事件发生时调用事件处理程序的顺序.

As far as I know there is no solution for this. That's because there is no guarantee for the order in which the event handlers are called when the event happens.

因此，您不应该以任何方式依赖他们的订单.

Because of that you are not supposed to rely on their order in any way.

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