1 using System;
2 using System.Collections.Generic;
3 using System.Text;
4 using System.IO;
5 using System.Net;
6 using System.Windows.Forms;
7
8 namespace PCMDataImporter
9 {
10 /// <summary>
11 /// 封装了FTP的两个操作：下载文件Download()和获取FTP服务器上文件列表信息GetFileList()
12 /// </summary>
13 public class ftpOperater
14 {
15 private string ftpServerIP;
16 private string ftpUser;
17 private string ftpPwd;
18
19 private SystemParaReader spReader;
20
21 public ftpOperater()
22 {
23 spReader = new SystemParaReader();
24 this.ftpServerIP = spReader.GetSysParaValue("ftpServer");
25 this.ftpUser = spReader.GetSysParaValue("ftpUser");
26 this.ftpPwd = spReader.GetSysParaValue("ftpPwd");
27 }
28
29 /// <summary>
30 /// 获取ftp服务器上的文件信息
31 /// </summary>
32 /// <returns>存储了所有文件信息的字符串数组</returns>
33 public string[] GetFileList()
34 {
35 string[] downloadFiles;
36 StringBuilder result = new StringBuilder();
37 FtpWebRequest reqFTP;
38 try
39 {
40 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
41 reqFTP.UseBinary = true;
42 reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
43 reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
44 WebResponse response = reqFTP.GetResponse();
45 StreamReader reader = new StreamReader(response.GetResponseStream());
46
47 string line = reader.ReadLine();
48 while (line != null)
49 {
50 result.Append(line);
51 result.Append("\n");
52 line = reader.ReadLine();
53 }
54 result.Remove(result.ToString().LastIndexOf('\n'), 1);
55 reader.Close();
56 response.Close();
57
58 return result.ToString().Split('\n');
59 }
60 catch (Exception ex)
61 {
62 System.Windows.Forms.MessageBox.Show("获取文件信息失败:"+ex.Message,"操作失败",MessageBoxButtons.OK,MessageBoxIcon.Error);
63 downloadFiles = null;
64 return downloadFiles;
65 }
66 }
67
68 /// <summary>
69 /// 获取FTP上指定文件的大小
70 /// </summary>
71 /// <param name="filename">文件名</param>
72 /// <returns>文件大小</returns>
73 public long GetFileSize(string filename)
74 {
75 FtpWebRequest reqFTP;
76 long fileSize = 0;
77 try
78 {
79 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + filename));
80 reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
81 reqFTP.UseBinary = true;
82 reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
83 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
84 Stream ftpStream = response.GetResponseStream();
85 fileSize = response.ContentLength;
86
87 ftpStream.Close();
88 response.Close();
89 }
90 catch (Exception ex)
91 {
92 MessageBox.Show("获取文件大小时，出现异常:\n" + ex.Message, "获取文件大小失败！", MessageBoxButtons.OK, MessageBoxIcon.Error);
93 }
94 return fileSize;
95 }
96
97 /// <summary>
98 /// 实现ftp下载操作
99 /// </summary>
100 /// <param name="filePath">保存到本地的文件名</param>
101 /// <param name="fileName">远程文件名</param>
102 public void Download(string filePath, string fileName)
103 {
104 FtpWebRequest reqFTP;
105 try
106 {
107 //filePath = <<The full path where the file is to be created.>>,
108 //fileName = <<Name of the file to be created(Need not be the name of the file on FTP server).>>
109 FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
110
111 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));
112 reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
113 reqFTP.UseBinary = true;
114 reqFTP.Credentials = new NetworkCredential(ftpUser, ftpPwd);
115 FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
116 Stream ftpStream = response.GetResponseStream();
117 long cl = response.ContentLength;
118 int bufferSize = 2048;
119 int readCount;
120 byte[] buffer = new byte[bufferSize];
121
122 readCount = ftpStream.Read(buffer, 0, bufferSize);
123 while (readCount > 0)
124 {
125 outputStream.Write(buffer, 0, readCount);
126 readCount = ftpStream.Read(buffer, 0, bufferSize);
127 }
128
129 ftpStream.Close();
130 outputStream.Close();
131 response.Close();
132 }
133 catch (Exception ex)
134 {
135 MessageBox.Show(ex.Message);
136 }
137 }
138 }
139 }
140
