.txt - 通過網絡（客戶端/服務器）傳輸文件 - 服務器上的.txt包含錯誤內容

Question

我正在處理客戶端服務器程序。客戶端向服務器發送一個.txt文件，服務器接收這個.txt文件並保存。

我的問題： 如果我發送包含以下內容的文本文件：「世界，你好」（沒有「」） 然後服務器recevies /保存包含以下內容的文本文件「ÿÿÿÿÿÿÿÿÿÿÿ」（沒有「」）。

兩個文件的文件大小是精確相同。

這裏我的代碼：

客戶： Program.cs的

  using System; 
      using System.Collections.Generic; 
      using System.Linq; 
      using System.Text; 
      using System.Threading.Tasks; 

      namespace FTP_3___Client { 
       public class Program { 
        static void Main(string[] args) { 
         new Client(); 
        } 
       } 
      } 

客戶： Client.cs：

  using System; 
      using System.Collections.Generic; 
      using System.ComponentModel; 
      using System.Data; 
      using System.Drawing; 
      using System.IO; 
      using System.Linq; 
      using System.Net; 
      using System.Net.Sockets; 
      using System.Text; 
      using System.Threading.Tasks; 
      using FTP_3___Client; 

      namespace FTP_3___Client { 
       public class Client { 

        public string name { get; set; } 
        public TcpClient clientConnection { get; set; } 
        public NetworkStream nws { get; set; } 
        public StreamReader sr { get; set; } 
        public StreamWriter sw { get; set; } 

        public int sizeOfConnectedClients { get; set; } 
        public string clientnamelistString { get; set; } 

        public Client() { 
         connectToServer(); 
         sendFile("zzz.txt"); 
        } 

        public void connectToServer() { 
         Console.WriteLine("connect to server..."); 
         clientConnection = new TcpClient(); 
         IPAddress ipadress = IPAddress.Parse("127.0.0.1"); 
         clientConnection.Connect(ipadress, 5555); 
         Console.WriteLine("connected to server!"); 

         nws = clientConnection.GetStream(); 
         sr = new StreamReader(nws); 
         sw = new StreamWriter(nws); 
        } 

        private void sendFile(string filename) { 

         FileStream fs = File.OpenRead(filename); 

         FileInfo fo = new FileInfo(filename); 
         long filesize = fo.Length; 
         Console.WriteLine("Filesize: " + filesize); 

         sw.WriteLine("/sendFile"); 
         sw.Flush(); 

         // Send filename to server 
         sw.WriteLine("Filename: " + filename); 
         sw.Flush(); 

         // Send filesize to server 
         sw.WriteLine("Filesize: " + filesize); 
         sw.Flush(); 

         byte[] fileBytes = File.ReadAllBytes(filename); 
         sw.WriteLine(fileBytes.Length); 
         sw.Flush(); 
         for (int i = 0; i < fileBytes.Length; i++) { 
          nws.WriteByte(fileBytes[i]); 
         } 

         sr.Close(); 
         sw.Close(); 
         nws.Close(); 

         Console.WriteLine("File sends!"); 
         Console.ReadLine(); 
        } 

       } 
      } 

---

服務器：在Program.cs

  using System; 
      using System.Collections.Generic; 
      using System.Linq; 
      using System.Text; 
      using System.Threading.Tasks; 

      namespace FTP_3___Server { 
       class Program { 
        static void Main(string[] args) { 
         new Server(); 
        } 
       } 
      } 

服務器：Server.cs

  using System; 
      using System.Collections.Generic; 
      using System.Linq; 
      using System.Text; 
      using System.Threading.Tasks; 
      using System.Threading; 
      using System.Net; 
      using System.Net.Sockets; 
      using System.IO; 

      namespace FTP_3___Server { 
       public class Server { 

        private IPAddress ipadress; 
        private TcpListener serverconnection; 
        private TcpClient clientconnection; 
        public NetworkStream nws { get; set; } 
        public StreamReader sr { get; set; } 
        public StreamWriter sw { get; set; } 

        public Server() { 
         startServer(); 
         waitForClient(); 
        } 

        public void startServer() { 
         ipadress = IPAddress.Parse("127.0.0.1"); 
         serverconnection = new TcpListener(ipadress, 5555); 
         serverconnection.Start(); 
        } 

        public void waitForClient() { 
         Console.WriteLine("Server startet. Waiting for incoming client connections..."); 
         clientconnection = serverconnection.AcceptTcpClient(); 
         nws = clientconnection.GetStream(); 
         sr = new StreamReader(nws); 
         sw = new StreamWriter(nws); 
         Console.WriteLine("Client connected with Server!"); 

         receiveMessage(); 
        } 

        public void receiveMessage() { 

         string receivedMessage = sr.ReadLine(); 

         switch (receivedMessage) { 
          case "/sendFile": { 
            receiveFile(); 
            break; 
           } 
          default: { 
            Console.WriteLine("Received undefined message: " + receivedMessage); 
            break; 
           } 
         } 

        } 

        public void receiveFile() { 
         // Recieve filename 
         string filename = sr.ReadLine().Remove(0, 10); 

         // Recieve filesize 
         long filesize = Convert.ToInt64(sr.ReadLine().Remove(0, 10)); 

         Console.WriteLine("Filename: " + filename); 
         Console.WriteLine("Filesize: " + filesize); 

         long count = filesize; 
         int arrayLength = Convert.ToInt32(sr.ReadLine()); 
         byte[] filebytes = new byte[arrayLength]; 

         for (int i = 0; i < filebytes.Length; i++) { 
          filebytes[i] = (byte)nws.ReadByte(); 
         } 

         try { 
          File.WriteAllBytes(filename, filebytes); 
         } catch (IOException e) { 
          Console.WriteLine(e.StackTrace); 
         } 

         sr.Close(); 
         sw.Close(); 
         nws.Close(); 

         Console.WriteLine("File was written on HDD. Finish!"); 
         Console.ReadLine(); 
        } 

       } 
      } 

Answer 1

C.Evenhuis給在評論答案。