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使用套接字编程在.NET中传输Tcp / IP文件

本文介绍了使用套接字编程在.NET中传输Tcp / IP文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我正在尝试通过VB.NET应用程序中的TCP / IP传输文件，我有关于传输文件大小的问题，这里是代码： 服务器： Imports System.Net.Sockets Imports System.Text Imports System.Net Imports System.ComponentModel Class MainWindow Dim 计时器作为 新秒表 昏暗 LocalAddr As IPAddress Dim ServerSocket As TcpListener Dim RequestCount As 整数 Dim ClientSocket As TcpClient Dim BW 作为 新 BackgroundWorker 使用 {。WorkerSupportsCancellation = True } Dim BWAccept As 新 BackgroundWorker 使用 {。WorkerSupportsCancellation = True } Dim FileStreamer As 新 System.IO.FileStream（ C：\ Users \m_shahgholi \Desktop \New folder \test.dcm，IO.FileMode.Create，IO.FileAccess.Write，IO.FileShare.ReadWrite） 私有 Sub DoWorker（发件人 As 对象，e As System.ComponentModel.DoWorkEventArgs） while （ True ） 尝试 RequestCount = RequestCount + 1 Dim networkStream As NetworkStream = ClientSocket.GetStream（） Dim bytesFrom（ClientSocket.ReceiveBufferSize） 作为 字节 networkStream.Read（bytesFrom， 0 ， CInt （ClientSocket.ReceiveBufferSize）） ' IO.File.WriteAllBytes（C：\ temp\1.dcm，bytesFrom） 我 .Dispatcher.Invoke（ Sub （） 如果 ClientSocket.Available<> 0 然后 TextBoxClientBufferSize.Text = ClientSocket.Available.ToString 结束 如果 FileStreamer.Write（bytesFrom， 0 ， CInt （ClientSocket.ReceiveBufferSize）） 结束 Sub ） ' Dim dataFromClient As String = System.Text.Encoding.ASCII.GetString（bytesFrom） ' dataFromClient = dataFromClient.Substring（0，dataFromClient.IndexOf（$）） ' msg（来自客户端的数据 - + dataFromClient） Dim serverResponse 作为 字符串 = 服务器响应 + Convert.ToString（RequestCount）+ $ Dim sendBytes As Byte （）=编码。 UTF8.GetBytes（serverResponse） networkStream.Write（sendBytes， 0 ，sendBytes.Length） networkStream.Flush（） msg （serverResponse） ' networkStream.Close（） Catch ex As Exception 退出 结束 尝试 结束 结束 Sub 私有 Sub CompleteWorker（发件人作为 Object ，e As System.ComponentModel.RunWorkerCompletedEventArgs） ClientSocket.Close（） ServerSocket。停止（） msg（ 退出） StackPanelClient.Visibility = Windows.Visibility.Collapsed Timer。 Stop （） TextBoxClientBufferSize.Text = Timer.Elapsed.ToStrin g FileStreamer.Close（） 结束 Sub Sub msg（ ByVal mesg As 字符串） mesg.Trim（） 我 .Dispatcher.Invoke（ Sub （） RichTextBoxRecivedText.AppendText（mesg + vbCrLf） RichTextBoxRecivedText.ScrollToEnd（） 结束 Sub ） 结束 Sub 私有 Sub ButtonStart_Click（发送者 As System。 Object ，e As System.Windows。 RoutedEventArgs）句柄 ButtonStart.Click TextBoxServerIP.Text = System.Net.Dns.GetHostByName（Dns.GetHostName（））。AddressList（ 0 ）。ToString（） LocalAddr = IPAddress.Parse（TextBoxServerIP.Text） ServerSocket = 新 TcpListener（LocalAddr， 8888 ） ServerSocket.Start（） msg（ 服务器已启动） WaitForClientProgressIndicator.Visibility = Windows.Visibility.Visible LabelServerIP.Visibility = Windows.Visibility.Visible TextBoxServerIP。 Visibility = Windows.Visibility.Visible WaitForClientProgressIndicator.Start（） StackPanelServer.Background = Brushes.Red AddHandler BWAccept.DoWork， AddressOf AcceptDoWorker AddHandler BWAcce pt.RunWorkerCompleted， AddressOf AcceptCompleteWorker BWAccept.RunWorkerAsync（） End Sub 私有 Sub AcceptDoWorker（发件人作为 对象，e As System.ComponentModel.DoWorkEventArgs） ClientSocket = ServerSocket.AcceptTcpClient ServerSocket.Server.ReceiveBufferSize = 8192 * 2 ClientSocket.ReceiveBufferSize = 8192 * 2 结束 Sub 私有 Sub AcceptCompleteWorker（发件人 As 对象，e As System.ComponentModel.RunWorkerCompletedEventArgs） msg（ 接受来自客户端的连接） Me .Dispatcher.Invoke（ Sub （）TextBoxClientBufferSize.Text = ClientSocket.ReceiveBufferSize） RequestCount = 0 RichTextBoxRecivedText.Background = Brushes.Black RichTextBoxRecivedText.Foreground = Brushes.WhiteSmoke WaitForClientProgressIndicator.Visibility = Windows.Visibility.Collapsed WaitForClientProgressIndicator。结束（） ButtonStart.Visibility = Windows.Visibility.Collapsed ButtonStop.Visibility = Windows.Visibility.Visible AddHandler BW.DoWork， AddressOf DoWorke r AddHandler BW.RunWorkerCompleted， AddressOf CompleteWorker Timer.Start（） BW.RunWorkerAsync（） TextBoxClientIP.Text = DirectCast （ClientSocket.Client.RemoteEndPoint，IPEndPoint）.Address.ToString StackPanelClient。 Visibility = Windows.Visibility.Visible StackPanelServer.Background = Brushes.WhiteSmoke End Sub 私有 Sub ButtonStop_Click（发件人作为系统。对象，e 作为 System.Windows.RoutedEventArgs）句柄 ButtonStop.Click ClientSocket.Close（） ServerSocket。停止（） msg（ 服务器已停止） ButtonStart.Visibility = Windows.Visibility.Visible ButtonStop.Visibility = Windows.Visibility.Collapsed BW.CancelAsync（） BWAccept.CancelAsync（） StackPanelClient.Visibility = Windows.Visibility.Collapsed StackPanelServer.Visibility = Windows.Visibility.Collapsed 结束 Sub 结束 Class 客户： Imports System.Net.Sockets Imports System.IO Class MainWindow Dim networkStream As NetworkStream 私人 Sub ButtonStart_Click（sender As System。 Object ，e As System.Windows.RoutedEventArgs）句柄 ButtonStart.Click Dim tcpClnt As 新 System.Net.Sockets.TcpClient Dim port As 整数 = 8888 尝试 tcpClnt.Connect（TextBoxServerIP.Text，port） networkStream = tcpClnt。 GetStream（） Catch ex As 异常 MsgBox（ex.ToString（） ） 结束 尝试 E nd Sub 私有 Sub ButtonSend_Click（sender As System。 Object ，e As System.Windows.RoutedEventArgs）句柄 ButtonSend.Click Dim fs 作为 FileStream fs = 新 FileStream（ D：\ Software \ NIC \ DCM \Series1 \10.129.1125.111.1246.1101.20150106081616.1.dcm，FileMode .Open） Dim objReader As New BinaryReader（fs） Dim send（） As 字节 = objReader.ReadBytes（fs.Length） networkStream.Write（send， 0 ，send.Length） objReader.Close（） fs.Close（） 结束 Sub 私有 Sub Window_Loaded（发件人作为系统。对象，e 作为 System.Windows.RoutedEventArgs）句柄 MyBase .Loaded TextBoxServerIP.Text = 192.168.1.106 结束 Sub 结束 类 我尝试了什么： 该应用程序有效，但有一个错误。假设一个文件大小为1000字节，在此代码中缓冲区大小为16KB。传输的文件是16KB而不是1000字节，并且在文件末尾添加了一些0。我必须做些什么来纠正？解决方案 ）） ' msg（来自客户端的数据 - + dataFromClient） Dim serverResponse As String = 服务器响应 + Convert.ToString（RequestCount）+ Dim sendBytes As Byte （）= Encoding.UTF8.GetBytes（serverResponse） networkStream.Write（sendBytes， 0 ，sendBytes.Length） networkStream.Flush（） msg（serverResponse） ' networkStream.Close（） Catch ex 作为例外 退出 结束 尝试 结束 while 结束 Sub 私有 Sub CompleteWorker（发件人正如 对象，e As System.ComponentModel.RunWorkerCompletedEventArgs） ClientSocket.Close（） ServerSocket。停止（） msg（ 退出） StackPanelClient.Visibility = Windows.Visibility.Collapsed Timer。 Stop （） TextBoxClientBufferSize.Text = Timer.Elapsed.ToString FileStreamer.Close（） 结束 Sub Sub msg（ ByVal mesg As String ） mesg.Trim（） Me .Dispatcher.Invoke（ Sub （） RichTextBoxRecivedText.AppendText（mesg + vbCrLf） RichTextBoxRecivedText.ScrollToEnd（） End Sub ） 结束 Sub 私有 Sub ButtonSt art_Click（发件人作为系统。对象，e As System.Windows.RoutedEventArgs）句柄 ButtonStart.Click TextBoxServerIP.Text = System.Net.Dns.GetHostByName（Dns.GetHostName（））。AddressList （ 0 ）。ToString（） LocalAddr = IPAddress.Parse（TextBoxServerIP.Text） ServerSocket = 新 TcpListener（LocalAddr， 8888 ） ServerSocket.Start（） msg（ 服务器已启动） WaitForClientProgressIndicator.Visibility = Windows.Visibility.Visible LabelServerIP.Visibility = Windows .Visibility.Visible TextBoxServerIP.Visibility = Windows.Visibility.Visible WaitForClientProgressIndicator.Start（） StackPanelServer.Background = Brushes.Red AddHandler BWAccept.DoWork， AddressOf AcceptDoWorker AddHandler BWAccept.RunWorkerCompleted， AddressOf AcceptCompleteWorker BWAccept.RunWorkerAsync（） End Sub 私有 Sub AcceptDoWorker（发件人作为 对象，e 正如 System.ComponentModel.DoWorkEventArgs） ClientSocket = ServerSocket.AcceptTcpClient ServerSocket.Server.ReceiveBufferSize = 8192 * 2 ClientSocket.ReceiveBufferSize = 8192 * 2 结束 Sub 私有 Sub AcceptCompleteWorker（sender As Object ，e As System.ComponentModel.RunWorkerCompletedEventArgs） msg（ 接受来自客户端的连接） Me .Dispatcher.Invoke（ Sub （）TextBoxClientBufferSize.Text = ClientSocket.ReceiveBufferSize） RequestCount = 0 RichTextBoxRecivedText.Background = Brushes.Black RichTextBoxRecivedText.Foreground = Brushes.WhiteSmoke WaitForClientProgressIndicator.Visibility = Windows .Visibility.Collapsed WaitForClientProgressIndicator。 End （） ButtonStart.Visibility = Windows.Visibility.Co llapsed ButtonStop.Visibility = Windows.Visibility.Visible AddHandler BW.DoWork， AddressOf DoWorker AddHandler BW.RunWorkerCompleted， AddressOf CompleteWorker Timer.Start（ ） BW.RunWorkerAsync（） TextBoxClientIP.Text = DirectCast （ClientSocket.Client.RemoteEndPoint，IPEndPoint）.Address.ToString StackPanelClient.Visibility = Windows.Visibility.Visible StackPanelServer.Background = Brushes.WhiteSmoke End Sub 私有 Sub ButtonStop_Click（发件人 As System。 Object ，e As System.Windows.RoutedEventArgs） 句柄 ButtonStop.Click ClientSocket.Close（） ServerSocket。停止（） msg（ 服务器已停止） ButtonStart.Visibility = Windows.Visibility.Visible ButtonStop.Visibility = Windows.Visibility.Collapsed BW.CancelAsync（） BWAccept.CancelAsync（） StackPanelClient.Visibility = Windows.Visibility.Collapsed StackPanelServer。可见性= Windows.Visibility.Collapsed 结束 Sub 结束 类 客户： Imports System.Net.Sockets Imports System.IO 班级 Ma inWindow Dim networkStream As NetworkStream 私有 Sub ButtonStart_Click（发件人 As 系统。 Object ，e As System.Windows.RoutedEventArgs） Handles ButtonStart。单击 Dim tcpClnt 作为 新 System.Net.Sockets.TcpClient Dim port As Integer = 8888 尝试 tcpClnt.Connect （TextBoxServerIP.Text，port） networkStream = tcpClnt.GetStream（） Catch ex As 异常 MsgBox（ex.ToString（）） 结束 尝试 结束 Sub 私有 Sub ButtonSend_Click（发件人作为系统。 Object ，e As System.Windows.RoutedEventArgs） Handles ButtonSend.Click Dim fs As FileStream fs = 新 FileStream（ D：\Software\NIC \ DCM \Series1 \10.129.1125.111.1246.1101.20150106081616.1.dcm，FileMode.Open） Dim objReader 作为 新 BinaryReader（fs） Dim send（）作为 字节 = objReader.ReadBytes（fs.Length） networkStream.Write（send， 0 ，send.Length） objReader.Close（） fs.Close（） 结束 Sub 私有 Sub Window_Loaded（sender As System。 Object ，e As System.Windows.RoutedEventArgs）句柄 MyBase .Loaded TextBoxServerIP.Text = 192.168.1.106 结束 Sub 结束 类 我尝试过： 该应用程序可以正常运行，但有错误。假设一个文件大小为1000字节，在此代码中缓冲区大小为16KB。传输的文件是16KB而不是1000字节，并且在文件末尾添加了一些0。我必须做些什么来纠正？ 你在这里写文件 ClientSocket.ReceiveBufferSize 字节： FileStreamer.Write（bytesFrom， 0 ， CInt （ClientSocket.ReceiveBufferSize ）） 即使您收到的字节数较少。 您必须使用实际收到的字节数，而不是 NetworkStream.Read（）： Dim numberOfBytesRead As Integer = 0 numberOfBytesRead = networkStream.Read（bytesFrom， 0 ，bytesFrom.Length） ' ... FileStreamer.Write（bytesFrom， 0 ，numberOfBytesRead） I am trying to transfer files through TCP/IP in a VB.NET application and I have problem about the size of transferred file here is the codes:Server:Imports System.Net.SocketsImports System.TextImports System.NetImports System.ComponentModelClass MainWindow Dim Timer As New Stopwatch Dim LocalAddr As IPAddress Dim ServerSocket As TcpListener Dim RequestCount As Integer Dim ClientSocket As TcpClient Dim BW As New BackgroundWorker With {.WorkerSupportsCancellation = True} Dim BWAccept As New BackgroundWorker With {.WorkerSupportsCancellation = True} Dim FileStreamer As New System.IO.FileStream("C:\Users\m_shahgholi\Desktop\New folder\test.dcm", IO.FileMode.Create, IO.FileAccess.Write, IO.FileShare.ReadWrite) Private Sub DoWorker(sender As Object, e As System.ComponentModel.DoWorkEventArgs) While (True) Try RequestCount = RequestCount + 1 Dim networkStream As NetworkStream = ClientSocket.GetStream() Dim bytesFrom(ClientSocket.ReceiveBufferSize) As Byte networkStream.Read(bytesFrom, 0, CInt(ClientSocket.ReceiveBufferSize)) 'IO.File.WriteAllBytes("C:\temp\1.dcm", bytesFrom) Me.Dispatcher.Invoke(Sub() If ClientSocket.Available <> 0 Then TextBoxClientBufferSize.Text = ClientSocket.Available.ToString End If FileStreamer.Write(bytesFrom, 0, CInt(ClientSocket.ReceiveBufferSize)) End Sub) 'Dim dataFromClient As String = System.Text.Encoding.ASCII.GetString(bytesFrom) 'dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$")) 'msg("Data from client - " + dataFromClient) Dim serverResponse As String = "Server response " + Convert.ToString(RequestCount) + "$" Dim sendBytes As Byte() = Encoding.UTF8.GetBytes(serverResponse) networkStream.Write(sendBytes, 0, sendBytes.Length) networkStream.Flush() msg(serverResponse) 'networkStream.Close() Catch ex As Exception Exit While End Try End WhileEnd SubPrivate Sub CompleteWorker(sender As Object, e As System.ComponentModel.RunWorkerCompletedEventArgs) ClientSocket.Close() ServerSocket.Stop() msg("exit") StackPanelClient.Visibility = Windows.Visibility.Collapsed Timer.Stop() TextBoxClientBufferSize.Text = Timer.Elapsed.ToString FileStreamer.Close()End SubSub msg(ByVal mesg As String) mesg.Trim() Me.Dispatcher.Invoke( Sub() RichTextBoxRecivedText.AppendText(mesg + vbCrLf) RichTextBoxRecivedText.ScrollToEnd() End Sub)End Sub Private Sub ButtonStart_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonStart.Click TextBoxServerIP.Text = System.Net.Dns.GetHostByName(Dns.GetHostName()).AddressList(0).ToString() LocalAddr = IPAddress.Parse(TextBoxServerIP.Text) ServerSocket = New TcpListener(LocalAddr, 8888) ServerSocket.Start() msg("Server Started") WaitForClientProgressIndicator.Visibility = Windows.Visibility.Visible LabelServerIP.Visibility = Windows.Visibility.Visible TextBoxServerIP.Visibility = Windows.Visibility.Visible WaitForClientProgressIndicator.Start() StackPanelServer.Background = Brushes.Red AddHandler BWAccept.DoWork, AddressOf AcceptDoWorker AddHandler BWAccept.RunWorkerCompleted, AddressOf AcceptCompleteWorker BWAccept.RunWorkerAsync()End SubPrivate Sub AcceptDoWorker(sender As Object, e As System.ComponentModel.DoWorkEventArgs) ClientSocket = ServerSocket.AcceptTcpClient ServerSocket.Server.ReceiveBufferSize = 8192 * 2 ClientSocket.ReceiveBufferSize = 8192 * 2End SubPrivate Sub AcceptCompleteWorker(sender As Object, e As System.ComponentModel.RunWorkerCompletedEventArgs) msg("Accept connection from client") Me.Dispatcher.Invoke(Sub() TextBoxClientBufferSize.Text = ClientSocket.ReceiveBufferSize) RequestCount = 0 RichTextBoxRecivedText.Background = Brushes.Black RichTextBoxRecivedText.Foreground = Brushes.WhiteSmoke WaitForClientProgressIndicator.Visibility = Windows.Visibility.Collapsed WaitForClientProgressIndicator.End() ButtonStart.Visibility = Windows.Visibility.Collapsed ButtonStop.Visibility = Windows.Visibility.Visible AddHandler BW.DoWork, AddressOf DoWorker AddHandler BW.RunWorkerCompleted, AddressOf CompleteWorker Timer.Start() BW.RunWorkerAsync() TextBoxClientIP.Text = DirectCast(ClientSocket.Client.RemoteEndPoint, IPEndPoint).Address.ToString StackPanelClient.Visibility = Windows.Visibility.Visible StackPanelServer.Background = Brushes.WhiteSmokeEnd SubPrivate Sub ButtonStop_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonStop.Click ClientSocket.Close() ServerSocket.Stop() msg("Server Stopped") ButtonStart.Visibility = Windows.Visibility.Visible ButtonStop.Visibility = Windows.Visibility.Collapsed BW.CancelAsync() BWAccept.CancelAsync() StackPanelClient.Visibility = Windows.Visibility.Collapsed StackPanelServer.Visibility = Windows.Visibility.CollapsedEnd SubEnd ClassClient:Imports System.Net.SocketsImports System.IOClass MainWindowDim networkStream As NetworkStreamPrivate Sub ButtonStart_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonStart.Click Dim tcpClnt As New System.Net.Sockets.TcpClient Dim port As Integer = 8888 Try tcpClnt.Connect(TextBoxServerIP.Text, port) networkStream = tcpClnt.GetStream() Catch ex As Exception MsgBox(ex.ToString()) End TryEnd SubPrivate Sub ButtonSend_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonSend.Click Dim fs As FileStream fs = New FileStream("D:\Software\NIC\DCM\Series1\10.129.1125.111.1246.1101.20150106081616.1.dcm", FileMode.Open) Dim objReader As New BinaryReader(fs) Dim send() As Byte = objReader.ReadBytes(fs.Length) networkStream.Write(send, 0, send.Length) objReader.Close() fs.Close()End SubPrivate Sub Window_Loaded(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded TextBoxServerIP.Text = "192.168.1.106"End SubEnd ClassWhat I have tried:The application works, but with an error. Suppose a file with the size of 1000 byte, in this code the buffer size is 16KB. The transferred file is 16KB not 1000 byte and some 0 is added to the end of file. What I must do for correction? 解决方案 ")) 'msg("Data from client - " + dataFromClient) Dim serverResponse As String = "Server response " + Convert.ToString(RequestCount) + "" Dim sendBytes As Byte() = Encoding.UTF8.GetBytes(serverResponse) networkStream.Write(sendBytes, 0, sendBytes.Length) networkStream.Flush() msg(serverResponse) 'networkStream.Close() Catch ex As Exception Exit While End Try End WhileEnd SubPrivate Sub CompleteWorker(sender As Object, e As System.ComponentModel.RunWorkerCompletedEventArgs) ClientSocket.Close() ServerSocket.Stop() msg("exit") StackPanelClient.Visibility = Windows.Visibility.Collapsed Timer.Stop() TextBoxClientBufferSize.Text = Timer.Elapsed.ToString FileStreamer.Close()End SubSub msg(ByVal mesg As String) mesg.Trim() Me.Dispatcher.Invoke( Sub() RichTextBoxRecivedText.AppendText(mesg + vbCrLf) RichTextBoxRecivedText.ScrollToEnd() End Sub)End Sub Private Sub ButtonStart_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonStart.Click TextBoxServerIP.Text = System.Net.Dns.GetHostByName(Dns.GetHostName()).AddressList(0).ToString() LocalAddr = IPAddress.Parse(TextBoxServerIP.Text) ServerSocket = New TcpListener(LocalAddr, 8888) ServerSocket.Start() msg("Server Started") WaitForClientProgressIndicator.Visibility = Windows.Visibility.Visible LabelServerIP.Visibility = Windows.Visibility.Visible TextBoxServerIP.Visibility = Windows.Visibility.Visible WaitForClientProgressIndicator.Start() StackPanelServer.Background = Brushes.Red AddHandler BWAccept.DoWork, AddressOf AcceptDoWorker AddHandler BWAccept.RunWorkerCompleted, AddressOf AcceptCompleteWorker BWAccept.RunWorkerAsync()End SubPrivate Sub AcceptDoWorker(sender As Object, e As System.ComponentModel.DoWorkEventArgs) ClientSocket = ServerSocket.AcceptTcpClient ServerSocket.Server.ReceiveBufferSize = 8192 * 2 ClientSocket.ReceiveBufferSize = 8192 * 2End SubPrivate Sub AcceptCompleteWorker(sender As Object, e As System.ComponentModel.RunWorkerCompletedEventArgs) msg("Accept connection from client") Me.Dispatcher.Invoke(Sub() TextBoxClientBufferSize.Text = ClientSocket.ReceiveBufferSize) RequestCount = 0 RichTextBoxRecivedText.Background = Brushes.Black RichTextBoxRecivedText.Foreground = Brushes.WhiteSmoke WaitForClientProgressIndicator.Visibility = Windows.Visibility.Collapsed WaitForClientProgressIndicator.End() ButtonStart.Visibility = Windows.Visibility.Collapsed ButtonStop.Visibility = Windows.Visibility.Visible AddHandler BW.DoWork, AddressOf DoWorker AddHandler BW.RunWorkerCompleted, AddressOf CompleteWorker Timer.Start() BW.RunWorkerAsync() TextBoxClientIP.Text = DirectCast(ClientSocket.Client.RemoteEndPoint, IPEndPoint).Address.ToString StackPanelClient.Visibility = Windows.Visibility.Visible StackPanelServer.Background = Brushes.WhiteSmokeEnd SubPrivate Sub ButtonStop_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonStop.Click ClientSocket.Close() ServerSocket.Stop() msg("Server Stopped") ButtonStart.Visibility = Windows.Visibility.Visible ButtonStop.Visibility = Windows.Visibility.Collapsed BW.CancelAsync() BWAccept.CancelAsync() StackPanelClient.Visibility = Windows.Visibility.Collapsed StackPanelServer.Visibility = Windows.Visibility.CollapsedEnd SubEnd ClassClient:Imports System.Net.SocketsImports System.IOClass MainWindowDim networkStream As NetworkStreamPrivate Sub ButtonStart_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonStart.Click Dim tcpClnt As New System.Net.Sockets.TcpClient Dim port As Integer = 8888 Try tcpClnt.Connect(TextBoxServerIP.Text, port) networkStream = tcpClnt.GetStream() Catch ex As Exception MsgBox(ex.ToString()) End TryEnd SubPrivate Sub ButtonSend_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles ButtonSend.Click Dim fs As FileStream fs = New FileStream("D:\Software\NIC\DCM\Series1\10.129.1125.111.1246.1101.20150106081616.1.dcm", FileMode.Open) Dim objReader As New BinaryReader(fs) Dim send() As Byte = objReader.ReadBytes(fs.Length) networkStream.Write(send, 0, send.Length) objReader.Close() fs.Close()End SubPrivate Sub Window_Loaded(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded TextBoxServerIP.Text = "192.168.1.106"End SubEnd ClassWhat I have tried:The application works, but with an error. Suppose a file with the size of 1000 byte, in this code the buffer size is 16KB. The transferred file is 16KB not 1000 byte and some 0 is added to the end of file. What I must do for correction?You are writing ClientSocket.ReceiveBufferSize bytes to the file here:FileStreamer.Write(bytesFrom, 0, CInt(ClientSocket.ReceiveBufferSize))even when you have received less bytes.You must use the number of bytes that has been actually received instead which are returned by NetworkStream.Read():Dim numberOfBytesRead As Integer = 0numberOfBytesRead = networkStream.Read(bytesFrom, 0, bytesFrom.Length)'...FileStreamer.Write(bytesFrom, 0, numberOfBytesRead) 这篇关于使用套接字编程在.NET中传输Tcp / IP文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！
09-12 05:49
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