ASP.NET实现FTP上传文件

  using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Net;

namespace FTPNS
...{
   public class FTPClass
   ...{
      private string Host='';//FTP主机IP
       
      private string Port='';//FTP主机端口号
       private string UserName='';//FTP主机登录用户名
       private string Userpwd='';//FTP主机登录密码
       private string UploadData='';//FTP上传数据
       private string RemoteFileName='';//FTP上传文件名       
       private string RemoteDir='';//FTP上传目录

        /**//// <summary>
       /// 创建FTP目录
        /// </summary>
       public static void MakeFTPDirectory()
       ...{
            FtpWebRequest req;
            FtpWebResponse response=null;

            req = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + Host + ":" + Port + "/" + RemoteDir));//初始化ftp目标   
             req.Credentials = new NetworkCredential(UserName, Userpwd);
            req.Method = WebRequestMethods.Ftp.ListDirectory;
            bool bDirExists = true ;
            try
            ...{
                response = req.GetResponse() as FtpWebResponse;
            }
            catch
            ...{
                bDirExists = false;
            }
            finally
            ...{
                if (response != null)
                    response.Close();
            }
            if (bDirExists )
            ...{
               return
            }

            string[] dirList = RemoteDir.Split(new char[] ...{ '/' }, StringSplitOptions.RemoveEmptyEntries);
            string curDir = "/";
            for (int i = 0; i < dirList.Length; i++)
            ...{
                string dir = dirList[i];
                // 如果是以/开始的路径,第一个为空  
                   if (dir != null && dir.Length > 0)
                ...{
                    curDir += dir + "/";
                    req = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + Host + ":" + Port + "/" + curDir));   
                     req.Credentials = new NetworkCredential(UserName, Userpwd);
                    req.Method = WebRequestMethods.Ftp.MakeDirectory;

                    try
                    ...{ 
                        response = req.GetResponse() as FtpWebResponse;
                    }
                    catch
                    ...{
 
                    }
                    finally
                    ...{
                        if(response !=null )
                            response.Close();
                    }
                }
            }
        }
        
        public static void FTPUploadFile()
        ...{             
            try
            ...{
                MakeFTPDirectory();

                string serverPath = "ftp://" + Host + ":" + Port + "/" + RemoteDir.Replace ('\\\\','/');
                if (!serverPath.EndsWith("/"))
                    serverPath += "/";

                serverPath += RemoteFileName;

                FtpWebRequest req = (FtpWebRequest)FtpWebRequest.Create(new Uri(serverPath ));   
                req.Method = WebRequestMethods.Ftp.UploadFile;  
                req.UseBinary =true;
                req.Credentials = new NetworkCredential(UserName, Userpwd);// 登录凭证   
                 req.ContentLength = UploadData.Length;
                int bufferSize = 4096;
                int length;
                byte[] buffer = new byte[bufferSize];
                int seek = 0;
                // 将文件流存在FileStream中   
                  using (MemoryStream fs = new MemoryStream(UploadData))
                ...{
                    // 上传流指向Stream   
                    using (Stream stream = req.GetRequestStream())
                    ...{
                        // 读取文件流中最大长度为bufferSize字节内容至buffer，读取长度返回至length   
                        length = fs.Read(buffer, 0, bufferSize);
                        // 如果读取到了内容   
                             while (length != 0)
                        ...{
                            //buffer写入上传流   
                                 stream.Write(buffer, 0, length);
                                 seek += length;
                            //继续读取   
                                 length = fs.Read(buffer, 0, bufferSize);
                        }
                    }
                }
                FtpWebResponse response = req.GetResponse() as FtpWebResponse;
                response.Close();
            }
            catch (Exception e)
            ...{
               
            }
        }    
    }
}