public class HttpHelper ???{ ???????public static string Post(string url, string paramData) ???????{ ???????????return Post(url, paramData, Encoding.UTF8); ???????} ???????public static string Post(string url, string paramData, Encoding encoding) ???????{ ???????????string result; ???????????if (url.ToLower().IndexOf("https", System.StringComparison.Ordinal) > -1) ???????????{ ???????????????ServicePointManager.ServerCertificateValidationCallback = ?new RemoteCertificateValidationCallback((sender, certificate, chain, errors) => { return true; }); ???????????} ???????????try ???????????{ ???????????????var wc = new WebClient(); ???????????????if (string.IsNullOrEmpty(wc.Headers["Content-Type"])) ???????????????{ ???????????????????wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded"); ???????????????} ???????????????wc.Encoding = encoding; ???????????????result = wc.UploadString(url, "POST", paramData); ???????????} ???????????catch (Exception e) ???????????{ ???????????????throw; ???????????} ???????????return result; ???????} ???????public static string Get(string url) ???????{ ???????????return Get(url, Encoding.UTF8); ???????} ???????public static string Get(string url, Encoding encoding) ???????{ ???????????try ???????????{ ???????????????var wc = new WebClient { Encoding = encoding }; ???????????????var readStream = wc.OpenRead(url); ???????????????using (var sr = new StreamReader(readStream, encoding)) ???????????????{ ???????????????????var result = sr.ReadToEnd(); ???????????????????return result; ???????????????} ???????????} ???????????catch (Exception e) ???????????{ ???????????????throw e; ???????????} ???????} ???????public static string PostData(string url, NameValueCollection parameters) ???????{ ???????????HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url); ???????????Encoding encoding = Encoding.UTF8; ???????????var parassb = new StringBuilder(); ???????????foreach (string key in parameters.Keys) ???????????{ ???????????????if (parassb.Length > 0) ???????????????{ ???????????????????parassb.Append("&"); ???????????????} ???????????????parassb.AppendFormat("{0}={1}", key, HttpUtility.UrlEncode(parameters[key])); ???????????} ???????????byte[] bs = Encoding.UTF8.GetBytes(parassb.ToString()); ???????????req.Method = "POST"; ???????????req.ContentType = "application/x-www-form-urlencoded"; ???????????req.ContentLength = bs.Length; ???????????using (Stream reqStream = req.GetRequestStream()) ???????????{ ???????????????reqStream.Write(bs, 0, bs.Length); ???????????????reqStream.Close(); ???????????} ???????????string result = String.Empty; ???????????using (HttpWebResponse response = (HttpWebResponse)req.GetResponse()) ???????????{ ???????????????using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding)) ???????????????{ ???????????????????result = reader.ReadToEnd(); ???????????????} ???????????????return result; ???????????} ???????} ???} ?

使用示例:

 ?????var data = "{\"touser\":\"Rich\" },"; ???????????data += "{\"msgtype\": \"text\"},"; ??????????data += "{\"text\": [{\"content\": \"test\"}]}"; ?????????var json = HttpHelper.Post("https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=" + accessToken, data); ?

var parameters = new NameValueCollection { { "Aid", dModel.Aid }, { "Oid", dModel.Oid }, { "Uid", dModel.Uid }, { "Cid", dModel.Coupon }, { "CidD", dModel.Usedt.ToString() }, { "Info", dModel.Info }, { "Return", dModel.ReturnVal } };HttpHelper.PostData("http://www.baidu.com", parameters);

httphelper

原文地址：http://www.cnblogs.com/jeff521xb/p/7499320.html