public void DoSomething()
{
if (NumberChanged != null)
{
Delegate[] dels = NumberChanged.GetInvocationList();
foreach (Delegate del in dels)
{
NumberChangedEventHandler handler = del as NumberChangedEventHandler;
try
{
handler(serverName, count);
}
catch (Exception ex)
{
Delegate.Remove(NumberChanged, del);
}
}
}
}
public event NumberChangedEventHandler NumberChanged; //
public List <string> PublishNumber(int count)
{
List <string> list = new List <string>();
if (NumberChanged == null)
{
return(list);
}
// 获得委托数组
Delegate[] delegateArray = NumberChanged.GetInvocationList();
foreach (var item in delegateArray)
{
// 进行一个向下转换
NumberChangedEventHandler method = (NumberChangedEventHandler)item;
if (NumberChanged == null)
{
return(list);
}
list.Add(method(100)); // 调用方法并获取返回值
}
return(list);
}
//public NumberChangedEventHandler NumberChanged;
public void Register(NumberChangedEventHandler method)
{
NumberChanged = method;
}
