c#socket数据发送同步接收

最新推荐文章于 2024-02-13 08:03:10 发布

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本文介绍了一个使用C#实现的TCP客户端程序，该程序能够连接到指定IP和端口的服务器，发送数据并接收返回的数据。通过创建TcpClient实例，进行连接操作，并利用NetworkStream进行数据的写入和读取，实现了与服务器的有效通信。

   /// <summary>
        /// 连接外部程序发送数据
        /// </summary>
        /// <param name="IP"></param>
        /// <param name="orderid"></param>
        /// <param name="pro"></param>
        /// <returns></returns>
        string socketcom(string IP, int pro, string postdata)
        {
            string isreturn = "";
            TcpClient tcp = new TcpClient();
            try
            {
                tcp.Connect(IP, pro);//根据服务器的IP地址和侦听的端口连接
            }
            catch (Exception ex)
            {

                MessageBox.Show(ex.ToString(), "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            //string Fil = DateTime.Now.ToString("yyyyMMddHHmmssffff") + ".html";
            if (tcp.Connected)
            {

                //连接成功的消息机制详细见DEMO
                int bytesRead = 0;
                //ShowGetData("成功连接上了服务器：", this.strIP.Text.ToString());
                NetworkStream streamToServer = tcp.GetStream();
                //string sbk = Fil + "|" + sqbeg + "|" + sqlend + "|" + sbktime;
                //string sbkend = "123456";
                byte[] buffer = Encoding.UTF8.GetBytes(postdata); //msg为发送的字符串
                try
                {
                    lock (streamToServer)
                    {
                        streamToServer.Write(buffer, 0, buffer.Length);     // 发往服务器

                    }
                    //接收字符串
                    buffer = new byte[10000];
                    lock (streamToServer)
                    {
                        bytesRead = streamToServer.Read(buffer, 0, 10000);
                        if (bytesRead > 0)
                        {
                            string temp = Encoding.UTF8.GetString(buffer, 0, 10000);
                            //isreturn = temp;
                            isreturn = HttpUtility.UrlDecode(temp);
                            tcp.Close();
                        }
                    }
                }
                catch (ArgumentOutOfRangeException ae)
                {
                    isreturn = "异常";
                }