如何在用户控件中引发事件并在主页中捕获它？

Question

我有一个UserControl,我需要通知父页面点击了一个按钮UserControl.如何UserControl在主页面上引发事件并将其捕获？我尝试过使用static,很多人建议我去参加活动!

Answer 1

查看Event Bubbling - http://msdn.microsoft.com/en-us/library/aa719644%28vs.71%29.aspx

编辑以添加一个快速示例:(和其他编辑以改进格式)

用户控制

public event EventHandler StatusUpdated;

private void FunctionThatRaisesEvent()
{
    //Null check makes sure the main page is attached to the event
    if (this.StatusUpdated != null)
       this.StatusUpdated(this, new EventArgs());
}

主页/表格

public void MyApp()
{
     //USERCONTROL = your control with the StatusUpdated event
     this.USERCONTROL.StatusUpdated += new EventHandler(MyEventHandlerFunction_StatusUpdated);
}

public void MyEventHandlerFunction_StatusUpdated(object sender, EventArgs e)
{
         //your code here
}

Answer 2

只需在您的控件中添加一个事件:

public event EventHandler SomethingHappened;

当你想通知父母时提出它:

if(SomethingHappened != null) SomethingHappened(this, new EventArgs);

如果您需要自定义EventArgs,请尝试EventHandler<T>使用T派生自的类型EventArgs.