如何在C#中进行非阻塞套接字调用以确定连接状态？
发布时间：2020-12-15 04:29:32 所属栏目：百科 来源：网络整理
导读：Socket上Connected属性的MSDN文档说明如下： The value of the Connected property reflects the state of the connection as of the most recent operation. If you need to determine the current state of the connection,make a nonblocking,zero-byte S
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Socket上Connected属性的MSDN文档说明如下：
我需要确定连接的当前状态 – 如何进行非阻塞,零字节发送调用？ 解决方法
Socket.Connected属性(至少.NET 3.5版本)的MSDN文档底部的示例显示了如何执行此操作：
// .Connect throws an exception if unsuccessful
client.Connect(anEndPoint);
// This is how you can determine whether a socket is still connected.
bool blockingState = client.Blocking;
try
{
byte [] tmp = new byte[1];
client.Blocking = false;
client.Send(tmp,0);
Console.WriteLine("Connected!");
}
catch (SocketException e)
{
// 10035 == WSAEWOULDBLOCK
if (e.NativeErrorCode.Equals(10035))
Console.WriteLine("Still Connected,but the Send would block");
else
{
Console.WriteLine("Disconnected: error code {0}!",e.NativeErrorCode);
}
}
finally
{
client.Blocking = blockingState;
}
Console.WriteLine("Connected: {0}",client.Connected);
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