[C#] 使用HttpWebRequest向網站提交資料

引用System.Net、System.IO名稱空間。

Method：傳遞方法
ContentType：內容類型
Url：網址
Param：傳遞參數
message：回傳結果

public static string CallWeb(string Method, string ContentType, string Url, string Param)
{
   HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
   request.ContentType = ContentType;
   request.Method = Method;

   if (Method.ToUpper().Equals("POST") && !string.IsNullOrEmpty(Param))
   {
      using (StreamWriter streamWriter = new StreamWriter(request.GetRequestStream()))
      {
         streamWriter.Write(Param);
         streamWriter.Flush();
         streamWriter.Close();
      }
    }

   string message = string.Empty;
   using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
   using (StreamReader streamReader = new StreamReader(response.GetResponseStream()))
   {
      message = streamReader.ReadToEnd();
   }

   return message;
}