.NET 远程处理中的事件问题
学习INGO RAMMER的“Advanced .NET Remoting”，我尝试使用以下代码向客户端触发事件：
foreach (Delegate del in MessageArrived.GetInvocationList())
{
try
{
mah = (MessageArrivedHandler) del;
mah(msg);
}
catch (Exception e)
{
Console.WriteLine("Exception occured, will remove Delegate");
MessageArrived -= mah;
}
}
当我在客户端模拟网络问题时，客户端的委托按预期被-=删除，并且MessageArrived变为null 。
但随着网络恢复，客户端将尝试连接、获取远程对象并重新注册事件，就像启动时一样，看起来重新注册成功，因为 MessageArrived 不为空。
问题是我仍然遇到异常将调用然后被删除的委托。 据我了解，这不会引起期望，因为。 客户端再次在线，并且 re-connect() 和 connect() 方法共享相同的代码...
任何人都可以帮助我吗？
Learning from INGO RAMMER's "Advanced .NET Remoting", I tried to use the following codes for firing events to clients:
foreach (Delegate del in MessageArrived.GetInvocationList())
{
try
{
mah = (MessageArrivedHandler) del;
mah(msg);
}
catch (Exception e)
{
Console.WriteLine("Exception occured, will remove Delegate");
MessageArrived -= mah;
}
}
When I simulated a network problem in client side, the client's delegate was removed by -= as expected, and the MessageArrived became null.
But as the network was restored, the client will try to connect, get remote object and re-register event as it does same for startup, it seems the re-registeration was successful as the MessageArrived was not null.
The problem is I still got the exception will invoke the delegate which was then removed. As I understand, this shall not raise expcetion coz. the client is online again and re-connect() and connect() method shares the same codes...
Can anybody help me?
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检查事件注销是否正常。 当客户端断开连接时，最好优雅地取消注册事件。
Check whether the unregistering of events is happening properly or not. When the client is disconnected it is preferable to unregister the events gracefully.