一个封装好的Asp.Net C# HttpRequest请求类

HTTP请求类：

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View Code       using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net; using System.IO;      namespace WebRequestAPP {     /// <summary>     /// Http请求     /// </summary>     public class HttpUtility     {         /// <summary>         ///通用HttpWebRequest         /// </summary>         /// <param name="method">请求方式（POST/GET）</param>         /// <param name="url">请求地址</param>         /// <param name="param">请求参数</param>         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>         /// <returns>请求返回的结果</returns>         public static string Request(string method, string url, string param, Action<HttpStatusCode,string> onComplete = null)         {             if(string.IsNullOrEmpty(url))              throw new ArgumentNullException("URL");                  switch (method.ToUpper())             {                  case "POST":                     return Post(url, param, onComplete);                 case "GET":                     return Get(url, param, onComplete);                 default:                     throw new EntryPointNotFoundException("method:" + method);             }         }              /// <summary>         /// Post请求         /// </summary>         /// <param name="url">请求地址</param>         /// <param name="param">参数</param>         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>         /// <returns>请求返回的结果</returns>         public static string Post(string url, string param, Action<HttpStatusCode, string> onComplete = null)         {             UrlCheck(ref url);                  byte[] bufferBytes = Encoding.UTF8.GetBytes(param);                  var request = WebRequest.Create(url) as HttpWebRequest;//HttpWebRequest方法继承自WebRequest, Create方法在WebRequest中定义，因此此处要显示的转换             request.Method = "POST";             request.ContentLength = bufferBytes.Length;             request.ContentType = "application/x-www-form-urlencoded";                  try             {                 using (var requestStream = request.GetRequestStream())                 {                     requestStream.Write(bufferBytes, 0, bufferBytes.Length);                 }             }             catch (WebException ex)             {                      return ex.Message;             }                  return HttpRequest(request, onComplete);         }              /// <summary>         /// GET请求         /// </summary>         /// <param name="url">请求地址</param>         /// <param name="param">参数</param>         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>         /// <returns>请求返回结果</returns>         public static string Get(string url, string param, Action<HttpStatusCode, string> onComplete = null)         {             UrlCheck(ref url);                  if (!string.IsNullOrEmpty(param))                 if (!param.StartsWith("?"))                     param += "?" + param;                 else                     param += param;                  var request = WebRequest.Create(url) as HttpWebRequest;             request.Method = "GET";             request.ContentType = "application/x-www-form-urlencoded";                  return HttpRequest(request, onComplete);         }              /// <summary>         /// 请求的主体部分（由此完成请求并返回请求结果）         /// </summary>         /// <param name="request">请求的对象</param>         /// <param name="onComplete">完成后执行的操作(可选参数，通过此方法可以获取到HTTP状态码)</param>         /// <returns>请求返回结果</returns>         private static string HttpRequest(HttpWebRequest request, Action<HttpStatusCode, string> onComplete = null)         {             HttpWebResponse response = null;                  try             {                 response = request.GetResponse() as HttpWebResponse;             }             catch (WebException ex)             {                 response = ex.Response as HttpWebResponse;             }                  if (response == null)             {                 if (onComplete != null)                     onComplete(HttpStatusCode.NotFound, "请求远程返回为空");                 return null;             }                  string result = string.Empty;             using (StreamReader reader = new StreamReader(response.GetResponseStream()))             {                 result = reader.ReadToEnd();             }                  if (onComplete != null)                 onComplete(response.StatusCode, result);                  return result;              }              /// <summary>         /// URL拼写完整性检查         /// </summary>         /// <param name="url">待检查的URL</param>         private static void UrlCheck(ref string url)         {             if (!url.StartsWith("http://") && !url.StartsWith("https://"))                 url="http://"+url;         }     } } http://www.dedecms.com/knowledge/program/asp-donet/2012/0803/4214.html