public static string getReportsContent(string param, string url, string RandomCode, string Authorization)
        {
            byte[] bytes = null;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            //获取请求的方式

            request.Method = "post";
            request.ContentType = "application/json";
            request.Headers.Add("RandomCode", RandomCode);
            request.Headers.Add("Authorization", Authorization);
            bytes = Encoding.UTF8.GetBytes(param);
            request.ContentLength = bytes.Length;
            Stream strStream = request.GetRequestStream();
            strStream.Write(bytes, 0, bytes.Length);
            strStream.Close();
            //获取设置身份认证及请求超时时间
            SetWebRequest(request);
            //就收应答
            HttpWebResponse httpResponse = (HttpWebResponse)request.GetResponse();
            Stream strStream1 = null;
            strStream1 = httpResponse.GetResponseStream();
            string responseContent = new StreamReader(strStream1, Encoding.UTF8).ReadToEnd();
            return responseContent;
        }

private static void SetWebRequest(HttpWebRequest request)
{
request.Credentials = CredentialCache.DefaultCredentials;
request.Timeout = 1000000;

}