vb.net 什么是 Visual Basic withevents 和 C# 中的句柄
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what is the equivalent of visual basic withevents and handles in C#
提问by Emrah KONDUR
I try to convert a Visual Basic (VB) project to C# and I have no idea how to change some of codes below,
我尝试将 Visual Basic (VB) 项目转换为 C#，但我不知道如何更改下面的一些代码，
In a windows form a field and a Timer object defined like this;
在一个窗口中形成一个字段和一个像这样定义的 Timer 对象；
Public WithEvents tim As New Timer
...
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tim.Tick
End Sub
...
How to rewrite this lines in C#?
如何在 C# 中重写这一行？
回答by Guillermo Jimenez
In C# you enrol an EventHandlerby registering a method delegate with the event using the +=operator as follows:
在 C# 中，您可以EventHandler通过使用+=运算符向事件注册方法委托来注册一个，如下所示：
public Timer tim = new Timer();
tim.Tick += Timer1_Tick;
private void Timer1_Tick(object sender, EventArgs e)
{
// Event handling code here
}
This works because the Tickevent of the Timerclass implements an Eventas follows:
这是有效的，因为类的Tick事件Timer实现Event如下：
public event EventHandler Tick
and EventHandleris a method delegate with signature:
并且EventHandler是一个带有签名的方法委托：
public delegate void EventHandler(
Object sender,
EventArgs e
)
which is why any method that conforms to the EventHandlersignature can be used as a handler.
这就是为什么任何符合EventHandler签名的方法都可以用作处理程序的原因。
