C# Http POST请求方法

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        /// <summary>        /// Name:Panda        /// POST请求        /// Date:2016-06-22        /// </summary>        /// <param name="Url">接口地址</param>        /// <param name="Param">接口参数</param>        /// <param name="ContentType">请求标头--由于多个接口在同一个程序中,标头不一致才写成传递形式,如表头都一致的话,可以写死</param>        /// <param name="RecCode">发送请求时编码格式--由于多个接口在同一个程序中,发送请求过去的编码不同,所以写成传递形式,如果都一致,可写死</param>        /// <param name="SendCode">接收返回编码格式--由于多个接口在同一个程序中,得到的返回结果的编码不同,所以写成传递形式,如果都一致,可写死</param>        /// <returns>返回POST结果</returns>        private string Post(string Url, string Param, string ContentType, string RecCode, string SendCode)         {            string responseFromServer = "";            WebRequest request = WebRequest.Create("" + Url + "");//创建一个请求，把接口地址填进来            request.Method = "POST";//设置请求的方法属性            //创建后数据并将其转换为字节数组            string postData = "" + Param + "";            byte[] byteArray = null;            if (RecCode.Equals("UTF8"))            {                byteArray = Encoding.UTF8.GetBytes(postData);            }            else if (RecCode.Equals("GBK"))            {                byteArray = Encoding.UTF8.GetBytes(postData);            }                       request.ContentType = "" + ContentType + "";//设置请求标头            request.ContentLength = byteArray.Length;//请求长度            Stream dataStream = request.GetRequestStream();//得到请求流            dataStream.Write(byteArray, 0, byteArray.Length);//将数据写入请求流            dataStream.Close();//关闭流对象            WebResponse response = request.GetResponse();//得到的响应            Console.WriteLine(((HttpWebResponse)response).StatusDescription);//显示状态            dataStream = response.GetResponseStream();//获取服务器返回的流            //StreamReader php = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("UTF-8"));            StreamReader reader = null;//;new StreamReader(dataStream);//打开流            if (SendCode.Equals("UTF8"))            {                reader = new StreamReader(dataStream, Encoding.GetEncoding("UTF-8"));//打开流            }            else if (SendCode.Equals("GBK"))            {                reader = new StreamReader(dataStream, Encoding.GetEncoding("GBK"));//打开流            }            responseFromServer = reader.ReadToEnd();//读取内容                                    reader.Close();            dataStream.Close();            response.Close();            return responseFromServer;        }
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