Sever端(封包發送成功--有發送出去) private void button1_Click(object sender, System.EventArgs e) { OpenFileDialog openFileDialog1 = new OpenFileDialog(); openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ; openFileDialog1.FilterIndex = 1 ; openFileDialog1.RestoreDirectory = true ; if(openFileDialog1.ShowDialog() == DialogResult.OK) { // Insert code to read the stream here. if(textBox2.TextLength == 0) { FileInfo decideSendFile = new FileInfo(openFileDialog1.FileName); textBox2.Text = "傳送檔案於：" "\t\n" decideSendFile.FullName; } else { FileInfo decideSendFile = new FileInfo(openFileDialog1.FileName); textBox2.Text = textBox2.Text "\t\n " "傳送檔案於：" "\t\n" decideSendFile.FullName; } } //.............................................傳送所選取的檔案............................................. try { FileInfo SendFile = new FileInfo(openFileDialog1.FileName); string SendFileName = SendFile.Name; byte[] fin = Encoding.ASCII.GetBytes(SendFileName.ToCharArray()); client.Send(fin); FileStream fsn = new FileStream(SendFile.FullName, FileMode.Open, FileAccess.Read); byte[] ffin = new Byte[fsn.Length]; fsn.Read(ffin,0,ffin.Length); client.Send(ffin); } catch(SocketException se ) { textBox1.Text = se.ToString(); } } Client端(還未寫完整--請大家指點一下) private void RecvFile_Click(object sender, System.EventArgs e) { SaveFileDialog saveFileDialog1 = new SaveFileDialog(); saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ; saveFileDialog1.FilterIndex = 1 ; saveFileDialog1.RestoreDirectory = true ; byte[] rec_filetobyte= new byte[1024]; client.Receive(rec_filetobyte); string Rec_filetostring=Encoding.ASCII.GetString (rec_filetobyte); if(saveFileDialog1.ShowDialog() == DialogResult.OK) { // Code to write the stream goes here. FileStream newfs = new FileStream (@"C:\test.txt",FileMode.OpenOrCreate ); BinaryWriter bw = new BinaryWriter (newfs); bw.Write (Rec_filetostring); } } 在clinet端需要怎ㄇ改阿 我原本的想法是: 1.接收 2.將byte-->string 3.開檔 4.將string寫入檔 5.存檔 請大家給我指點一下吧