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

//body是要传递的参数,格式roleId=1uid=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) /// summary /// 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 /// /summary /// param name=uri/param /// param name=paramStrname=张三age=20/param /// param name=encoding请先确认目标网页的编码方式/param /// param name=username/param /// param name=password/param /// returns/returns 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, usernam