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即使服務器正在報告它正在發送消息,我的客戶端程序仍然卡在NetworkStream.Read
上。客戶端和服務器在同一臺計算機上運行。卡住套接字消息接收
全部服務器代碼(控制檯應用程序)
Imports System.Net.Sockets
Imports System.Text
Module Module1
Sub Main()
'Dim address As New System.Net.IPAddress("127.0.0.1")
'Dim serverSocket As New TcpListener(address, 8888)
Dim serverSocket As New TcpListener(8888)
Dim clientSocket As TcpClient
Dim counter As Integer
serverSocket.Start()
msg("Server Started")
counter = 0
While (True)
counter += 1
clientSocket = serverSocket.AcceptTcpClient()
msg("Client No:" + Convert.ToString(counter) + " started!")
Dim client As New handleClient
client.startClient(clientSocket, Convert.ToString(counter))
End While
clientSocket.Close()
serverSocket.Stop()
msg("exit")
Console.ReadLine()
End Sub
Sub msg(ByVal mesg As String)
mesg.Trim()
Console.WriteLine(" >> " + mesg)
End Sub
Public Class handleClient
Dim clientSocket As TcpClient
Dim clNo As String
Public Sub startClient(ByVal inClientSocket As TcpClient, ByVal clineNo As String)
Me.clientSocket = inClientSocket
Me.clNo = clineNo
Dim ctThread As Threading.Thread = New Threading.Thread(AddressOf doChat)
ctThread.Start()
End Sub
Private Sub doChat()
Dim requestCount As Integer
Dim bytesFrom(10024) As Byte
Dim dataFromClient As String
Dim sendBytes As [Byte]()
Dim serverResponse As String
Dim rCount As String
requestCount = 0
While (True)
Try
requestCount = requestCount + 1
Dim networkStream As NetworkStream = clientSocket.GetStream()
networkStream.Read(bytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom)
dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"))
msg("From client-" + clNo + ": " + dataFromClient)
rCount = Convert.ToString(requestCount)
serverResponse = "Server to client(" + clNo + ") " + rCount
sendBytes = Encoding.ASCII.GetBytes(serverResponse)
networkStream.Write(sendBytes, 0, sendBytes.Length)
networkStream.Flush()
msg(serverResponse)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End While
End Sub
End Class
End Module
完整的客戶端代碼(窗體應用程序)
Public Class CSocketClient
Dim clientSocket As New System.Net.Sockets.TcpClient()
Dim serverStream As NetworkStream
'Connect
Public Sub init(ByVal address As String, ByVal port As Integer)
clientSocket.Connect(address, port)
End Sub
'Run once
Public Sub runOnce()
sendMSG("Message1 from Client$")
receiveMSG()
sendMSG("Message2 from Client$")
receiveMSG()
End Sub
'Send msg
Public Sub sendMSG(ByVal msg As String)
Dim serverStream As NetworkStream = clientSocket.GetStream()
Dim outStream As Byte() = System.Text.Encoding.ASCII.GetBytes(msg)
serverStream.Write(outStream, 0, outStream.Length)
serverStream.Flush()
End Sub
'Receive msg
Public Sub receiveMSG()
Dim inStream(10024) As Byte
Dim buffSize As Integer = clientSocket.ReceiveBufferSize
MsgBox("X")
serverStream.Read(inStream, 0, buffSize)
MsgBox("Y")
Dim returndata As String = System.Text.Encoding.ASCII.GetString(inStream)
MsgBox("Data from Server : " & returndata)
End Sub
End Class
要使用客戶端:
Dim client As New CSocketClient
client.init("127.0.0.1", 8888)
client.runOnce()
我加MsgBox("X")
and MsgBox("Y")
來驗證它沒有通過serverStream.Read
。 「X」彈出很好,它永遠不會到達Y.
任何人都可以告訴爲什麼發生這種情況?