问题描述
您好，
在socket编程中，beginconnect（）的重要性是什么？实际上我遇到了一个错误，因为我做了一个实验：
- 我有一台设备通过网络连接到我的PC应用程序。
- 我然后取下LAN电缆。
- 过了一段时间后，我再次将LAN电缆重新连接回设备。我的PC应用程序抛出一个错误说：
使用beginconnect再次连接，也可以使用另一个端点。
- 所以我尝试了另一件事：我编写了以下代码：
套接字s =新套接字（AddressFamily.InterNetwork，SocketType.Stream，ProtocolType.Tcp）;
IPEndPoint ip = new IPEndPoint（IPAddress.Parse（172.16.3.230），502）;
s.Connect（ip）;
do
{
Console.WriteLine（connect？）;
string s1 = Console.ReadLine（）;
如果（s1 ==y）
{
s.Connect（ip）;
}
} while（true）;
}
- 在此我按y重新连接。但是这一次它给出了另一个错误：
你已经连接到那个端点了。这里的错误是不同的。这是否意味着beginconnect是重新连接的最佳选择？
我读到Socket.BeginConnect（）：它的语法是：
public IAsyncResult BeginConnect（
IPAddress []地址，------ 1
int port，------ 2
AsyncCallback requestCallback，------ 3
对象状态------ 4
）
有人可以向我解释第四个论点吗？
谢谢，
- Rahul
Hello,
Whats the significance of beginconnect() in socket programming? Actually i encountered an error because i did an experiment:
- I had a device connected on network to my PC application.
- I then removed the LAN cable.
- After sometime i again reconnected the LAN cable back to the device. My PC application threw an error saying :
"use beginconnect to connect once again and that too to a different endpoint".
- So i tried out another thing: i wrote the following code:
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ip = new IPEndPoint(IPAddress.Parse("172.16.3.230"),502);
s.Connect(ip);
do
{
Console.WriteLine("connect?");
string s1 = Console.ReadLine();
if (s1 == "y")
{
s.Connect(ip);
}
} while (true);
}
- In this i press "y" to reconnect again. However this time it gives another error saying:
"You are already connected to that endpoint". The error here is different. Does this imply that beginconnect is the best option to reconnect?
I read about Socket.BeginConnect(): its syntax is :
public IAsyncResult BeginConnect(
IPAddress[] addresses, ------1
int port, ------2
AsyncCallback requestCallback, ------3
Object state ------4
)
Can someone please explain me the 4th argument?
Thanks,
- Rahul
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