ASP.NET 使用FTP文件上传、下载文件

来源：互联网发布：js返回上一个页面编辑：程序博客网时间：2024/05/17 23:04

文章转自： http://blog.csdn.net/ZZJ_4Ever/article/details/4038575

01./// <summary>
02.///
05.{
06.    string ftpServerIP;
07.    string ftpRemotePath; FtpWeb 的摘要说明
03./// </summary>
04.public class FtpWeb
08.    string ftpUserID;
09.    string ftpPassword;
10.    string ftpURI;
11.
12.    /// <summary>
13.    /// 连接FTP
14.    /// </summary>
15.    /// <param name="FtpServerIP">FTP连接地址</param>
16.    /// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>
17.    /// <param name="FtpUserID">用户名</param>
18.    /// <param name="FtpPassword">密码</param>
19.    public FtpWeb(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword)
20.    {
21.        ftpServerIP = FtpServerIP;
22.        ftpRemotePath = FtpRemotePath;
23.        ftpUserID = FtpUserID;
24.        ftpPassword = FtpPassword;
25.        ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
26.    }
27.
28.    /// <summary>
29.    /// 上传
30.    /// </summary>
31.    /// <param name="filename"></param>
32.    public bool Upload(string filename, out string errorMsg)
33.    {
34.        errorMsg = "";
35.        FileInfo fileInf = new FileInfo(filename);
36.        string uri = ftpURI + fileInf.Name;
37.        FtpWebRequest reqFTP;
38.
39.        reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
40.        reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
41.        reqFTP.KeepAlive = false;
42.        reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
43.        reqFTP.UseBinary = true;
44.        reqFTP.ContentLength = fileInf.Length;
45.        int buffLength = 2048; //开辟2KB缓存区
46.        byte[] buff = new byte[buffLength];
47.        int contentLen;
48.        FileStream fs = fileInf.OpenRead();
49.        try
50.        {
51.            Stream strm = reqFTP.GetRequestStream();
52.            contentLen = fs.Read(buff, 0, buffLength);
53.            while (contentLen != 0)
54.            {
55.                strm.Write(buff, 0, contentLen);
56.                contentLen = fs.Read(buff, 0, buffLength);
57.            }
58.            strm.Close();
59.            fs.Close();
60.            return true;
61.        }
62.        catch (Exception ex)
63.        {
64.            errorMsg = ex.Message;
65.            return false;
66.        }
67.    }
68.
69.    /// <summary>
70.    /// 下载
71.    /// </summary>
72.    /// <param name="filePath"></param>
73.    /// <param name="fileName"></param>
74.    public bool Download(string filePath, string fileName, out string errorMsg)
75.    {
76.        errorMsg = "";
77.        FtpWebRequest reqFTP;
78.        try
79.        {
80.            FileStream outputStream = new FileStream(filePath + "//" + fileName, FileMode.Create);
81.
82.            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));
83.            reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
84.            reqFTP.UseBinary = true;
85.            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
86.            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
87.            Stream ftpStream = response.GetResponseStream();
88.            long cl = response.ContentLength;
89.            int bufferSize = 2048;
90.            int readCount;
91.            byte[] buffer = new byte[bufferSize];
92.
93.            readCount = ftpStream.Read(buffer, 0, bufferSize);
94.            while (readCount > 0)
95.            {
96.                outputStream.Write(buffer, 0, readCount);
97.                readCount = ftpStream.Read(buffer, 0, bufferSize);
98.            }
99.
100.            ftpStream.Close();
101.            outputStream.Close();
102.            response.Close();
103.            return true;
104.        }
105.        catch (Exception ex)
106.        {
107.            errorMsg = ex.Message;
108.            return false;
109.        }
110.    }
111.}