ASP.Net Post方式获取数据流的一种简单写法

public static string PostWebReq(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);
 newStream.Close();

 HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
 StreamReader sr = new StreamReader(response.GetResponseStream(), DataEncode);
 ret = sr.ReadToEnd();

 sr.Close();
 response.Close();
 newStream.Close();
 }
 catch (WebException ex)
 {
 Log.WriteLog(LogFile.Error, ex.Message);
 }
 finally
 {
 Log.WriteLog(LogFile.Info, ret);
 }
 return ret;
 }