asp.net web实现ftp上传代码 (解决大文件上传问题)

原来使用asp.net上传控件上传 那个虽然简单但是页面不是很友好 然后就用了uploadify上传控件  这个控件虽然界面友好 但是大文件还是不能上传 而且在不同的浏览器会出现session丢失问题 所以我到了个ftp上传的方法

using System;
 using System.Configuration;
 using System.Data;
 using System.Linq;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.HtmlControls;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Xml.Linq;
 using System.IO;
 using System.Net;
 using System.Text;
 
 public partial class _Default : System.Web.UI.Page 
 {
     //以下字段配置在web.config
     private string ftpServerIP = "127.0.0.1";//服务器ip
     private string ftpUserID = "FTPTEST";//用户名FTPTEST
     private string ftpPassword = "ftptest";//密码
     protected void Page_Load(object sender, EventArgs e)
     {
 
         if (MyFile.Value != "")
         {
             //string a = MyFile.;
         }
         
     }
 
 
 
 
 
 
 
 
     //ftp的上传功能
     private void Upload(string filename)
     {
         FileInfo fileInf = new FileInfo(filename);
 
         string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
         FtpWebRequest reqFTP;
 
         // 根据uri创建FtpWebRequest对象 
         reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));
 
         // ftp用户名和密码
         reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
 
         // 默认为true，连接不会被关闭
 // 在一个命令之后被执行
         reqFTP.KeepAlive = false;
 
         // 指定执行什么命令
         reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
 
         // 指定数据传输类型
         reqFTP.UseBinary = true;
 
         // 上传文件时通知服务器文件的大小
         reqFTP.ContentLength = fileInf.Length;
 
         // 缓冲大小设置为2kb
         int buffLength = 2048;
 
         byte[] buff = new byte[buffLength];
         int contentLen;
 
         // 打开一个文件流 (System.IO.FileStream) 去读上传的文件
         FileStream fs = fileInf.OpenRead();
         try
         {
             // 把上传的文件写入流
             Stream strm = reqFTP.GetRequestStream();
 
             // 每次读文件流的2kb
             contentLen = fs.Read(buff, 0, buffLength);
 
             // 流内容没有结束
             while (contentLen != 0)
             {
                 // 把内容从file stream 写入 upload stream
                 strm.Write(buff, 0, contentLen);
 
                 contentLen = fs.Read(buff, 0, buffLength);
             }
 
             // 关闭两个流
             strm.Close();
             fs.Close();
             this.Page.RegisterStartupScript("", "<script>alert('成功')</script>");
         }
         catch (Exception ex)
         {
             // MessageBox.Show(ex.Message, "Upload Error");
             Response.Write("Upload Error：" + ex.Message);
         }
     }
 
 
     //从ftp服务器上下载文件的功能
     private void Download(string filePath, string fileName)
     {
         FtpWebRequest reqFTP;
 
         try
         {
             FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
 
             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));
 
             reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
 
             reqFTP.UseBinary = true;
 
             reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
 
             FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
 
             Stream ftpStream = response.GetResponseStream();
 
             long cl = response.ContentLength;
 
             int bufferSize = 2048;
 
             int readCount;
 
             byte[] buffer = new byte[bufferSize];
 
             readCount = ftpStream.Read(buffer, 0, bufferSize);
 
             while (readCount > 0)
             {
                 outputStream.Write(buffer, 0, readCount);
 
                 readCount = ftpStream.Read(buffer, 0, bufferSize);
             }
 
             ftpStream.Close();
 
             outputStream.Close();
 
             response.Close();
         }
         catch (Exception ex)
         {
             Response.Write("Download Error：" + ex.Message);
         }
     }
 
     //从ftp服务器上获得文件列表
     public string[] GetFileList()
     {
         string[] downloadFiles;
         StringBuilder result = new StringBuilder();
         FtpWebRequest reqFTP;
         // HttpWebRequest reqFTP;
         try
         {
             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
             reqFTP.UseBinary = true;
             reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
             reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
             WebResponse response = reqFTP.GetResponse();
             StreamReader reader = new StreamReader(response.GetResponseStream());
             string line = reader.ReadLine();
             while (line != null)
             {
                 result.Append(line);
                 result.Append("\n");
                 line = reader.ReadLine();
             }
             // to remove the trailing '\n'        
             result.Remove(result.ToString().LastIndexOf('\n'), 1);
             reader.Close();
             response.Close();
             return result.ToString().Split('\n');
         }
         catch (Exception ex)
         {
             downloadFiles = null;
             return downloadFiles;
         }
     }
 
     protected void Button1_Click(object sender, EventArgs e)
     {
         Upload("F:\\美国队长DVD中字.rmvb");
     }
     protected void Button2_Click(object sender, EventArgs e)
     {
 
     }
 }