Winform 上传文件(ftp方式)

来源：互联网发布：我心伤悲莫知我哀对句编辑：程序博客网时间：2024/06/07 02:44

经常有人加我QQ询问winform上传文件的事。这里我开贴写下

就我知道而言 winform上传文件有两种方式

1种用FTP。这个方式比较推荐的方式。只是复杂一点。需要架设FTP服务器。还必须FTP好多API要了解。

但是功能比较强大。在客户端能操作服务器上任何文件，可以新建文件夹。

2用WebClient控件服务器用ASP.NET或者JSP方式。其实就是我们常用的HTML浏览本地文件然后上传的功能。只不过客户端用一个控件代替了。但是服务器端还必须要ASP.NET页面来接收这个文件。这个方式客户端不能实现文件管理。文件管理都必须在服务器的ASP.NET页面里面来做管理。

3还一个方式是HttpWebRequest.但是这个方式的原理还是WebClient。还是直接推荐用WebClient。不推荐用HttpWebRequest

1：FTP方式。通过在IIS里架设FTP服务器。代码

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Windows.Forms;

namespace net.emice.TEST1
{
    class FtpUpDown
    {
   string ftpServerIP;

   public string FtpServerIP
   {
    get { return ftpServerIP; }
    set { ftpServerIP = value; }
   }
   string ftpUserID;

   public string FtpUserID
   {
    get { return ftpUserID; }
    set { ftpUserID = value; }
   }
   string ftpPassword;

   public string FtpPassword
   {
    get { return ftpPassword; }
    set { ftpPassword = value; }
   }
        FtpWebRequest reqFTP;

        private void Connect(String path)//连接ftp
        {
            // 根据uri创建FtpWebRequest对象
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
            // 指定数据传输类型
            reqFTP.UseBinary = true;
            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
        }
        public FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            this.ftpServerIP = ftpServerIP;
            this.ftpUserID = ftpUserID;
            this.ftpPassword = ftpPassword;
        }
        //都调用这个
        private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            try
            {
                Connect(path);
                reqFTP.Method = WRMethods;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名
                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)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
                downloadFiles = null;
                return downloadFiles;
            }
        }
        public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
        }
        public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
        }

        public string Upload(string filename) //上面的代码实现了从ftp服务器上载文件的功能
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
            Connect(uri);//连接
            // 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;
            // 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kb
            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kb
                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();
     return "";
            }
           catch (Exception ex)
           {
                return "Upload Error"+ex.Message;
            }
        }
        public string Download(string filePath, string fileName)////上面的代码实现了从ftp服务器下载文件的功能
        {
            try
            {
                String onlyFileName = Path.GetFileName(fileName);
                string newFileName = filePath + "//" + onlyFileName;
                if (File.Exists(newFileName))
                {
      return "本地文件" + newFileName + "已存在,无法下载";
                }
                string url = "ftp://" + ftpServerIP + "/" + fileName;
                Connect(url);//连接
                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);
                FileStream outputStream = new FileStream(newFileName, FileMode.Create);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();

                return "";
            }
           catch (Exception ex)
            {
                return "因"+ex.Message+",无法下载";
            }
        }
        //删除文件
        public void DeleteFileName(string fileName)
        {
           try
            {
                FileInfo fileInf = new FileInfo(fileName);
                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                Connect(uri);//连接
                // 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.DeleteFile;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
               response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "删除错误");
            }
        }
        //创建目录
        public string MakeDir(string dirName)
        {
           try
            {
               string uri = "ftp://" + ftpServerIP + "/" + dirName;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
     return "";
            }
            catch (WebException ex)
            {
                return "[Make Dir]"+ex.Message;
            }
        }
        //删除目录
        public void delDir(string dirName)
        {
           try
            {
               string uri = "ftp://" + ftpServerIP + "/" + dirName;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        //获得文件大小
        public long GetFileSize(string filename)
        {
            long fileSize = 0;
            try
            {
                FileInfo fileInf = new FileInfo(filename);
                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                fileSize = response.ContentLength;
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            return fileSize;
        }
        //文件改名
        public void Rename(string currentFilename, string newFilename)
        {
            try
            {
                FileInfo fileInf = new FileInfo(currentFilename);
                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                //Stream ftpStream = response.GetResponseStream();
                //ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        //获得文件明晰
        public string[] GetFilesDetailList()
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);
        }
        //获得文件明晰
        public string[] GetFilesDetailList(string path)
       {
            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
        }
    }
}