PostRequest请求

有翅膀的大象 / 2023-04-28 / 原文

public static string PostRequest(string url, Dictionary<object, object> paramList)
    {
        try
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
            StringBuilder sb = new StringBuilder();
            foreach (var item in paramList)
            {
                sb.Append(item.Key + "=" + item.Value + "&");
            }
            //将参数拼为:"name=test&pwd=123" 这种字符串格式 然后将字符串转为byte数组 最后将byte数组写入请求流中
            string paramData = sb.ToString().Trim('&');
            byte[] data = System.Text.Encoding.UTF8.GetBytes(paramData);
            //设置post方式
            request.Method = "post";
            //这句不能少  不难post请求 得不到对应的响应结果
            request.ContentType = "application/x-www-form-urlencoded";
            //设置请求参数的长度
            request.ContentLength = data.Length;
            Stream stream = request.GetRequestStream();
            stream.Write(data, 0, data.Length);
            stream.Close();
            #region
            /**
             * *****************注意事项********************
             * 
             * 不管是get还是post请求最后得到的响应流不能直接stream 
             * 不难得不到响应结果
             * 
             * 
             * 直接使用Stream 不能获取响应的结果值
             * 
             * 要使用StreamReader才能获取响应的结果值
             * 
             * Stream stream = response.GetResponseStream();
             * 
             * byte[] data = new byte[2*1024*1024]
             * 
             * int r = stream.Read(data,0,data.Length);
             * 
             * string result = System.Text.Encoding.UTF8.GetString(data, 0, r);
             * 
             *        
             * **/
            #endregion
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            using (StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
            {
                string result = sr.ReadToEnd();
                return result;
            }
        }
        catch (Exception ex)
        {
            return "err";
        }
    }

调用方法：

    Dictionary<object, object> dic1 = new Dictionary<object, object>();
            dic1.Add("username", user);
            dic1.Add("password", "7ccb767af356d6bda110a7f09c")
         
      string token =  Webhelper.PostRequest(url+"/login?", dic1);