如何使用委托和事件处理程序进行用户控制

How to work with delegates and event handler for user control(如何使用委托和事件处理程序进行用户控制)

问题描述

我创建了一个包含按钮的用户控件.我在我的 winform 上使用这个控件，它将在从数据库中获取数据后在运行时加载.

I have created a user control that contains a button. I am using this control on my winform which will be loaded at run time after fetching data from database.

现在我需要在该按钮的 Click 事件中从数据表中删除一行.

Now I need to remove a row from a datatable on the Click event of that button.

问题是我如何在我的表单中捕获该事件.目前它在该用户控件的 btn 点击事件定义中.

The problem is that how do I capture that event in my form. Currently it goes in that user control's btn click event defination.

推荐答案

您可以通过在用户控件中执行以下操作来创建自己的委托事件:

You can create your own delegate event by doing the following within your user control:

public event UserControlClickHandler InnerButtonClick;
public delegate void UserControlClickHandler (object sender, EventArgs e);

您使用以下方法从您的处理程序中调用事件:

You call the event from your handler using the following:

protected void YourButton_Click(object sender, EventArgs e)
{
   if (this.InnerButtonClick != null)
   {
      this.InnerButtonClick(sender, e);
   }
}

然后您可以使用以下方法挂钩事件

Then you can hook into the event using

UserControl.InnerButtonClick+= // Etc.

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