C# 将参数传递给事件处理程序
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Passing arguments to an event handler
提问by user476566
In the below code, I am defining an event handler and would like to access the age and name variable from that without declaring the name and age globally. Is there a way I can say e.ageand e.name?
在下面的代码中，我定义了一个事件处理程序，并希望从中访问年龄和名称变量，而无需全局声明名称和年龄。有什么办法可以说e.age和e.name吗？
void Test(string name, string age)
{
Process myProcess = new Process();
myProcess.Exited += new EventHandler(myProcess_Exited);
}
private void myProcess_Exited(object sender, System.EventArgs e)
{
// I want to access username and age here. ////////////////
eventHandled = true;
Console.WriteLine("Process exited");
}
采纳答案by ColinE
Yes, you could define the event handler as a lambda expression:
是的，您可以将事件处理程序定义为 lambda 表达式：
void Test(string name, string age)
{
Process myProcess = new Process();
myProcess.Exited += (sender, eventArgs) =>
{
// name and age are accessible here!!
eventHandled = true;
Console.WriteLine("Process exited");
}
}
回答by MaciekTalaska
If you want to access username and age, you should create handler which uses custom EventArgs (inherited from EventArgs class), like following:
如果您想访问用户名和年龄，您应该创建使用自定义 EventArgs（继承自 EventArgs 类）的处理程序，如下所示：
public class ProcessEventArgs : EventArgs
{
public string Name { get; internal set; }
public int Age { get; internal set; }
public ProcessEventArgs(string Name, int Age)
{
this.Name = Name;
this.Age = Age;
}
}
and the delegate
和代表
public delegate void ProcessHandler (object sender, ProcessEventArgs data);
