發送第二條消息,我想通過TCP/IP使用TCPClient
和TCPListner
類無法通過TCP/IP
下面的C#應用程序發送的消息是我的代碼,我從CodeProject網站獲得。
客戶code written over btn click
try
{
TcpClient tcpclnt = new TcpClient();
Console.WriteLine("Connecting.....");
tcpclnt.Connect("192.168.0.102", 8001);
// use the ipaddress as in the server program
Console.WriteLine("Connected");
//Console.Write("Enter the string to be transmitted : ");
String str = textBox1.Text;
Stream stm = tcpclnt.GetStream();
ASCIIEncoding asen = new ASCIIEncoding();
byte[] ba = asen.GetBytes(str);
Console.WriteLine("Transmitting.....");
stm.Write(ba, 0, ba.Length);
byte[] bb = new byte[100];
int k = stm.Read(bb, 0, 100);
for (int i = 0; i < k; i++)
Console.Write(Convert.ToChar(bb[i]));
tcpclnt.Close();
}
catch (Exception ex)
{
Console.WriteLine("Error..... " + ex.Message);
}
服務器code written on form_load
try
{
IPAddress ipAd = IPAddress.Parse("192.168.0.102");
// use local m/c IP address, and
// use the same in the client
/* Initializes the Listener */
TcpListener myList = new TcpListener(ipAd, 8001);
/* Start Listeneting at the specified port */
myList.Start();
Console.WriteLine("The server is running at port 8001...");
Console.WriteLine("The local End point is :" +
myList.LocalEndpoint);
Console.WriteLine("Waiting for a connection.....");
Socket s = myList.AcceptSocket();
Console.WriteLine("Connection accepted from " + s.RemoteEndPoint);
byte[] b = new byte[100];
int k = s.Receive(b);
Console.WriteLine("Recieved...");
string str = string.Empty;
for (int i = 0; i < k; i++)
{
Console.Write(Convert.ToChar(b[i]));
str = str + Convert.ToChar(b[i]);
}
label1.Text = str;
ASCIIEncoding asen = new ASCIIEncoding();
s.Send(asen.GetBytes("The string was recieved by the server."));
Console.WriteLine("\nSent Acknowledgement");
/* clean up */
s.Close();
// myList.Stop();
}
這裏就client
,我要寄給在tcp
寫在文本字符串,並將其深受server
收到。
但是,當我試圖發送另一個字符串,它失敗沒有任何exception
和客戶端應用程序掛起無限時間。
這裏有什麼問題?
雖然這不是您的主要問題:TCP/IP是基於流的,而不是基於消息的。像這樣的代碼是致命的缺陷:你可能永遠不會假設對'Receive'的特定調用接收到特定數量的字節。您可以確定的是,如果客戶端寫入「N」個字節,則「接收」調用的某些組合最終將收到所有「N」個字節。像這樣的代碼可以在本地套接字上的測試設置中正常工作,並且在實際網絡中工作時會失敗。 –