C#通过WebClient,HttpWebRequest实现http的post和get方法.doc

/body是要传递的参数,格式roleId=1&uid=2/post的cotentType填写:/application/x-www-form-urlencoded/soap填写:text/xml; charset=utf-8 public static string PostHttp(string url, string body, string contentType) HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url); httpWebRequest.ContentType = contentType; httpWebRequest.Method = POST; httpWebRequest.Timeout = 20000; byte btBodys = Encoding.UTF8.GetBytes(body); httpWebRequest.ContentLength = btBodys.Length; httpWebRequest.GetRequestStream().Write(btBodys, 0, btBodys.Length); HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse(); StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream(); string responseContent = streamReader.ReadToEnd(); httpWebResponse.Close(); streamReader.Close(); httpWebRequest.Abort(); httpWebResponse.Close(); return responseContent; POST方法(httpWebRequest)/ / 通过WebClient类Post数据到远程地址，需要Basic认证； / 调用端自己处理异常 / / / name=张三&age=20 / 请先确认目标网页的编码方式 / / / public static string Request_WebClient(string uri, string paramStr, Encoding encoding, string username, string password) if (encoding = null) encoding = Encoding.UTF8; string result = string.Empty; WebClient wc = new WebClient(); / 采取POST方式必须加的Header wc.Headers.Add(Content-Type, application/x-www-form-urlencoded); byte postData = encoding.GetBytes(paramStr); if (!string.IsNullOrEmpty(username) & !string.IsNullOrEmpty(password) wc.Credentials = GetCredentialCache(uri, username, password); wc.Headers.Add(Authorization, GetAuthorization(username, password); byte responseData = wc.UploadData(uri, POST, postData); / 得到返回字符流 return encoding.GetString(responseData);/ 解码 POST方法(WebClient)public static string GetHttp(string url, HttpContext httpContext) string queryString = ?; foreach (string key in httpContext.Request.QueryString.AllKeys) queryString += key + = + httpContext.Request.QueryStringkey + &; queryString = queryString.Substring(0, queryString.Length - 1); HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url + queryString); httpWebRequest.ContentType = application/json; httpWebRequest.Method = GET; httpWebRequest.Timeout = 20000; /byte btBodys = Encoding.UTF8.GetBytes(body); /httpWebRequest.ContentLength = btBodys.Length; /httpWebRequest.GetRequestStream().Write(btBodys, 0, btBodys.Length); HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse(); StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream(); string responseContent = streamReader.ReadToEnd(); httpWebResponse.Close(); streamReader.Close(); return responseContent; Get方法(HttpWebRequest)/ / 通过 WebRequest/WebResponse 类访问远程地址并返回结果，需要Basic认证； / 调用端自己处理异常 / / / 访问超时时间，单位毫秒；如果不设置超时时间，传入0 / 如果不知道具体的编码，传入null / / / public static string Request_WebRequest(string uri, int timeout, Encoding encoding, string username, string password) string result = string.Empty; WebRequest request = WebRequest.Create(new Uri(uri); if (!string.IsNullOrEmpty(username) & !string.IsNullOrEmpty(password) request.Credentials = GetCredentialCache(uri, username, password); request.Headers.Add(Authorization, GetAuthorization(username, password); if (timeout 0) request.Timeout = timeout; WebResponse response = request.GetResponse(); Stream stream = response.GetResponseStream(); StreamReader sr = encoding = null ? new StreamReader(stream) : new StreamReader(stream, encoding); result = sr.ReadToEnd(); sr.Close(); stream.Close(); return result; #region # 生成 Http Basic 访问凭证 # private static CredentialCache GetCredentialCache(string uri, string username, string password) string authorization = string.Format(0:1, username, password); CredentialCache credCache = new CredentialCache(); credCache.Add(new Uri(uri), Basic, new NetworkCredential(username, password); return credCache; private static string GetAuthorization(string username, s