http怎么传输一个很长的字符串

winform端向webform传一个很长的字符串，超过get的长度限制，应该怎么写
我用的是webclient 实在不知道怎么写，uploadstring好像不行 还是我用法不对 希望能大神解惑
然后服务器怎么接收这个字符串 ，希望能有代码

转成流StreamReader，还有分长度的吗？传文件都是字节流，大小由IIS决定的，HTTP就这些吧

使用post方法........

get方式，长度不能超过1024或2048个字节。
有两个方式：用post方式，或用http压缩传送

public static string SendMsg(string fxPhone, string fxPassword, string toPhone, string msg)
        {
            try
            {
                string url = "u=" + fxPhone + "&";
                url = url + "p=";
                url = url + fxPassword + "&";
                url = url + "to=";
                url = url + toPhone + "&";
                url = url + "m=" + msg;

                string formUrl = "http://quanapi.sinaapp.com/fetion.php";
                string formData = url;                               //提交的参数

                //注意提交的编码 这边是需要改变的 这边默认的是Default：系统当前编码
                byte[] postData = Encoding.UTF8.GetBytes(formData);

                // 设置提交的相关参数 
                HttpWebRequest request = WebRequest.Create(formUrl) as HttpWebRequest;
                Encoding myEncoding = Encoding.UTF8;
                request.Method = "POST";
                request.KeepAlive = false;
                request.AllowAutoRedirect = true;
                request.ContentType = "application/x-www-form-urlencoded";
                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR  3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";
                request.ContentLength = postData.Length;

                // 提交请求数据 
                System.IO.Stream outputStream = request.GetRequestStream();
                outputStream.Write(postData, 0, postData.Length);
                outputStream.Close();

                HttpWebResponse response;
                Stream responseStream;
                StreamReader reader;
                string srcString;
                response = request.GetResponse() as HttpWebResponse;
                responseStream = response.GetResponseStream();
                reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("UTF-8"));
                srcString = reader.ReadToEnd();
                string result = srcString;   //返回值赋值
                reader.Close();
                return result;
            }
            catch
            {
                return "error";
            }
        }

如果你要使用webclient，如下：

    public static void PostString (string address)
    {
        string data = "Time = 12:00am temperature = 50";
        string method = "POST";
        WebClient client = new WebClient ();
        string reply = client.UploadString (address, method, data);

        Console.WriteLine (reply);
    }

如果你使用asp.net webform，直接用httpRequest的form来取，你自己写以下，调一调就懂了。

HTTP GET/POST是在content-type中指定的，你可以顺便了解下HTTP协议。

如果你使用mvc，可以参考以下代码：

        //
        // POST: /Customer/Create

        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create(FormCollection collection)
        {
            try
            {
                // TODO: Add insert logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }