HttpRequest使用POST/GET方法-优快云博客

本文链接：https://blog.youkuaiyun.com/yz1988computer/article/details/19562461

本文档提供了使用C#进行HTTP请求的方法，包括POST和GET两种方式。POST方法通过创建HttpWebRequest对象，设置Method为POST，写入参数并获取响应数据。GET方法则直接创建WebRequest对象并获取响应数据。

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        /// <summary>
        /// Post方式提交并返回数据
        /// </summary>
        /// <param name="postUrl">提交地址</param>
        /// <param name="paramData">提交数据(访问url接口的请求参数)</param>
        /// <param name="dataEncode">编码</param>
        /// <returns></returns>
        public static string PostWebRequest(string postUrl, string paramData, Encoding dataEncode)
        {
            string ret = string.Empty;
            try
            {
                byte[] byteArray = dataEncode.GetBytes(paramData);

               HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
                webReq.Method = "POST";
                webReq.ContentType = "application/x-www-form-urlencoded";

                webReq.ContentLength = byteArray.Length;
                Stream newStream = webReq.GetRequestStream();
                newStream.Write(byteArray, 0, byteArray.Length);//写入参数
                newStream.Close();
                HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
                ret = sr.ReadToEnd();
                sr.Close();
                response.Close();
                newStream.Close();
            }
            catch (Exception ex)
            {

            }
            return ret;
        }

        /// <summary>
        /// Get方式提交并返回数据
        /// </summary>
        /// <param name="url">提交地址</param>
        /// <param name="enc">编码</param>
        /// <returns></returns>
        public static string GetWebRequest(string url, Encoding enc)
        {
            string retStr = "";
            try
            {
                WebRequest req = WebRequest.Create(url);
                WebResponse res = req.GetResponse();
                Stream resStream = res.GetResponseStream();
                StreamReader sr = new StreamReader(resStream, enc);
                retStr = sr.ReadToEnd();    //读取网页的源代码
                resStream.Close();
                sr.Close();
            }
            catch (Exception e)
            {
            }

return retStr;
}