推荐订阅源

using System.IO;

1、获取远程服务器文件的大小
public static long GetRemoteHTTPFileSize(string sURL)
{
      long size = 0L;
      try
      {
           System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(sURL);
           request.Method = "HEAD";

           System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();

            size = response.ContentLength;
             response.Close();
        }
        catch
        {
             size = 0L;
        }
        return size;
}

2、下载远程服务器的文件
public static void GetRemoteHTTPFileDown(string sURL)
{
      Stream content = null;
      try
      {
               System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(URL);
                request.Method = "GET";

                System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();

                content = response.GetResponseStream();
                StreamReader sr = new StreamReader(content, System.Text.Encoding.Default);
                string str = sr.ReadToEnd();
                StreamWriter sw = new StreamWriter(Server.MapPath("~/1.txt"), false, System.Text.Encoding.Unicode);
                sw.Write(str);
                sw.Flush();
                sw.Close();
                sr.Close();
                response.Close();
        }
       catch
       { }
}