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分享为什么socket.Available老是为0
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
Connect();
}
private void Connect()
{
//CloseConnection();
socket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream,ProtocolType.Tcp);
socket.SetSocketOption (SocketOptionLevel.Socket,
SocketOptionName.SendTimeout, 5000);
IPAddress ipAdd=IPAddress.Parse("127.0.0.1");
int port = System.Convert.ToInt32("23");
IPEndPoint hostEndPoint = new IPEndPoint(ipAdd, port);
try
{
socket.Connect(hostEndPoint);
if (socket.Connected)
{
Receive();
}
}
catch (Exception e)
{
this.Response.Write("<script>alert('连接失败')</script>");
return;
}
}
private void Receive()
{
//用于接收数据的缓冲
byte[] buf;
string result="";
int count = socket.Available;
if (count > 0)
{
buf = new byte[count];
socket.Receive(buf);
result = ProcessOptions(buf);
if (result!="")
{
result=result.Replace("\r","\n");
this.TextBox1.Text+=result.Replace("\r\n","\n");
}
RespondToOptions();
}
}
为什么int count = socket.Available;老是为0？？？！！谢谢回复！！
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shizhusz110 2008-10-30
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谢谢你，我该成这样了：
我最后去掉了判断数据是接受到了，老超时：Welcome to Microsoft Telnet Service login: Session timed out.Telnet Server has closed the connection
private void Receive()
{
//用于接收数据的缓冲
byte[] buf;
string result="";
buf = new byte[max_char];
socket.Receive(buf);
result = ProcessOptions(buf);
if (result!="")
{
result=result.Replace("\r","\n");
this.TextBox1.Text+=result.Replace("\r\n","\n");
}
RespondToOptions();
}
我最后去掉了判断数据是接受到了，老超时：Welcome to Microsoft Telnet Service login: Session timed out.Telnet Server has closed the connection
greystar 2008-10-30
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// FIONREAD is also available as the "Available" property.
public const int FIONREAD = 0x4004667F;
static void DisplayPendingByteCount(Socket s)
{
byte[] outValue = BitConverter.GetBytes(0);
// Check how many bytes have been received.
s.IOControl(FIONREAD, null, outValue);
uint bytesAvailable = BitConverter.ToUInt32(outValue, 0);
Console.WriteLine("server has {0} bytes pending. Available property says {1}.",
bytesAvailable, s.Available);
return;
}
public const int FIONREAD = 0x4004667F;
static void DisplayPendingByteCount(Socket s)
{
byte[] outValue = BitConverter.GetBytes(0);
// Check how many bytes have been received.
s.IOControl(FIONREAD, null, outValue);
uint bytesAvailable = BitConverter.ToUInt32(outValue, 0);
Console.WriteLine("server has {0} bytes pending. Available property says {1}.",
bytesAvailable, s.Available);
return;
}
greystar 2008-10-30
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如果当前使用的是非阻止 Socket，一种较好的做法是在调用 Receive 之前使用 Available 来确定数据是否排队等待读取。可用的数据即网络缓冲区中排队等待读取的全部数据。如果在网络缓冲区中没有排队的数据，则 Available 返回 0。
greystar 2008-10-30
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对方有发送数据吗.
你这个不用判断,你是用同步的方式.
你这个不用判断,你是用同步的方式.
