asp.net实现ftp上传代码(解决大文件上传问题)

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asp.net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

以下是具体代码

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1 using System;
2 using System.Configuration;
3 using System.Data;
4 using System.Linq;
5 using System.Web;
6 using System.Web.Security;
7 using System.Web.UI;
8 using System.Web.UI.HtmlControls;
9 using System.Web.UI.WebControls;
10 using System.Web.UI.WebControls.WebParts;
11 using System.Xml.Linq;
12 using System.IO;
13 using System.Net;
14 using System.Text;
15
16 public partial class _Default : System.Web.UI.Page
17 {
18     //以下字段配置在web.config
19     private string ftpServerIP = "127.0.0.1";//服务器ip
20     private string ftpUserID = "FTPTEST";//用户名FTPTEST
21     private string ftpPassword = "ftptest";//密码
22     protected void Page_Load(object sender, EventArgs e)
23     {
24
25         if (MyFile.Value != "")
26         {
27             //string a = MyFile.;
28         }
29
30     }
31
32
33
34
35
36
37
38
39     //ftp的上传功能
40     private void Upload(string filename)
41     {
42         FileInfo fileInf = new FileInfo(filename);
43
44         string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
45         FtpWebRequest reqFTP;
46
47         // 根据uri创建FtpWebRequest对象
48         reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));
49
50         // ftp用户名和密码
51         reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
52
53         // 默认为true，连接不会被关闭
54 // 在一个命令之后被执行
55         reqFTP.KeepAlive = false;
56
57         // 指定执行什么命令
58         reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
59
60         // 指定数据传输类型
61         reqFTP.UseBinary = true;
62
63         // 上传文件时通知服务器文件的大小
64         reqFTP.ContentLength = fileInf.Length;
65
66         // 缓冲大小设置为2kb
67         int buffLength = 2048;
68
69         byte[] buff = new byte[buffLength];
70         int contentLen;
71
72         // 打开一个文件流 (System.IO.FileStream) 去读上传的文件
73         FileStream fs = fileInf.OpenRead();
74         try
75         {
76             // 把上传的文件写入流
77             Stream strm = reqFTP.GetRequestStream();
78
79             // 每次读文件流的2kb
80             contentLen = fs.Read(buff, 0, buffLength);
81
82             // 流内容没有结束
83             while (contentLen != 0)
84             {
85                 // 把内容从file stream 写入 upload stream
86                 strm.Write(buff, 0, contentLen);
87
88                 contentLen = fs.Read(buff, 0, buffLength);
89             }
90
91             // 关闭两个流
92             strm.Close();
93             fs.Close();
94             this.Page.RegisterStartupScript("", "<script>alert('成功')</script>");
95         }
96         catch (Exception ex)
97         {
98             // MessageBox.Show(ex.Message, "Upload Error");
99             Response.Write("Upload Error：" + ex.Message);
100         }
101     }
102
103
104     //从ftp服务器上下载文件的功能
105     private void Download(string filePath, string fileName)
106     {
107         FtpWebRequest reqFTP;
108
109         try
110         {
111             FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
112
113             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));
114
115             reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
116
117             reqFTP.UseBinary = true;
118
119             reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
120
121             FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
122
123             Stream ftpStream = response.GetResponseStream();
124
125             long cl = response.ContentLength;
126
127             int bufferSize = 2048;
128
129             int readCount;
130
131             byte[] buffer = new byte[bufferSize];
132
133             readCount = ftpStream.Read(buffer, 0, bufferSize);
134
135             while (readCount > 0)
136             {
137                 outputStream.Write(buffer, 0, readCount);
138
139                 readCount = ftpStream.Read(buffer, 0, bufferSize);
140             }
141
142             ftpStream.Close();
143
144             outputStream.Close();
145
146             response.Close();
147         }
148         catch (Exception ex)
149         {
150             Response.Write("Download Error：" + ex.Message);
151         }
152     }
153
154     //从ftp服务器上获得文件列表
155     public string[] GetFileList()
156     {
157         string[] downloadFiles;
158         StringBuilder result = new StringBuilder();
159         FtpWebRequest reqFTP;
160         // HttpWebRequest reqFTP;
161         try
162         {
163             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
164             reqFTP.UseBinary = true;
165             reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
166             reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
167             WebResponse response = reqFTP.GetResponse();
168             StreamReader reader = new StreamReader(response.GetResponseStream());
169             string line = reader.ReadLine();
170             while (line != null)
171             {
172                 result.Append(line);
173                 result.Append("\n");
174                 line = reader.ReadLine();
175             }
176             // to remove the trailing '\n'
177             result.Remove(result.ToString().LastIndexOf('\n'), 1);
178             reader.Close();
179             response.Close();
180             return result.ToString().Split('\n');
181         }
182         catch (Exception ex)
183         {
184             downloadFiles = null;
185             return downloadFiles;
186         }
187     }
188
189     protected void Button1_Click(object sender, EventArgs e)
190     {
191         Upload("F:\\美国队长DVD中字.rmvb");
192     }
193     protected void Button2_Click(object sender, EventArgs e)
194     {
195
196     }
197 }