post提交url

 //post提交数据 传入url,和参数
        private string post(string url, string data)
        {
            string str = string.Empty;

            try
            {
                //创建httpWebRequest对象 创建url地址
                HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(url);
                //把数据转换成字节数组
                byte[] buffer = Encoding.UTF8.GetBytes(data);
                //提交方式post
                webReq.Method = "POST";
                //http标头
                webReq.ContentType = "application/x-www-form-urlencoded";
                //http标头的长度等于字节数组的长度
                webReq.ContentLength = buffer.Length;
                //返回一个文件流
                Stream postData = webReq.GetRequestStream();
                //把字节写入文件流
                postData.Write(buffer, 0, buffer.Length);
                //关闭文件流
                postData.Close();
                //调用GetResponse 响应结果
                HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
                //调用GetResponseStream返回文件流
                Stream answer = webResp.GetResponseStream();
                //创建StreamReader对象来读取文件流
                StreamReader answerData = new StreamReader(answer);
                //读到结束
                str = answerData.ReadToEnd();
            }
            catch (Exception ex)
            {
                str = string.Empty;
            }

            return str;
        }

  //post url提交

 private string postTest11(string url, string data)
        {
            string str = string.Empty;

            try
            {
                //创建httpWebRequest对象 创建url地址
                HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(url+data);
                //提交方式post
                webReq.Method = "POST";
                //http标头
                webReq.ContentType = "application/x-www-form-urlencoded";
                //返回一个文件流
                Stream postData = webReq.GetRequestStream();
                //关闭文件流
                postData.Close();
                //调用GetResponse 响应结果
                HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
                //调用GetResponseStream返回文件流
                Stream answer = webResp.GetResponseStream();
                //创建StreamReader对象来读取文件流
                StreamReader answerData = new StreamReader(answer);
                //读到结束
                str = answerData.ReadToEnd();
                answerData.Close();
                webResp.Close();
            }
            catch (Exception ex)
            {
                str = string.Empty;
            }

            return str;
        }