FTP上传图片

Question

我在用C#做手机软件开发，需要向指定FTP服务器上传图片。 
    请问哪位高手能不能告诉我可以用那些FTP类？
    或者提供给我一些例子？
多谢了！！

Answer 1

FtpWebRequest 类http://msdn.microsoft.com/zh-cn/library/system.net.ftpwebrequest(VS.80).aspx 

Answer 2

using System;
using System.IO;
using System.Net;
using System.Net.Security;
using System.Collections;
using System.Collections.Generic;
using System.Security.Cryptography.X509Certificates;
using System.Web;
using System.Web.Configuration;
  1  public sealed class FtpClientService
 2     {
 3         #region Internal Members
 4 
 5         private NetworkCredential certificate;
 6 
 7         #endregion
 8 
 9         /// <summary>
10         /// 构造函数，提供初始化数据的功能，打开Ftp站点
11         /// </summary>
12         public FtpClientService()
13         {
14             certificate = new NetworkCredential(WebConfigurationManager.AppSettings["UserName"], WebConfigurationManager.AppSettings["PassWord"]);
15         }
16 
17  /// <summary>
18         /// 创建FTP请求
19         /// </summary>
20         /// <param name="uri">ftp://myserver/upload.txt</param>
21         /// <param name="method">Upload/Download</param>
22         /// <returns></returns>
23         private FtpWebRequest CreateFtpWebRequest(Uri uri, string method)
24         {
25             FtpWebRequest ftpClientRequest = (FtpWebRequest)WebRequest.Create(uri);
26 
27             ftpClientRequest.Proxy = null;
28             ftpClientRequest.Credentials = certificate;
29             ftpClientRequest.KeepAlive = true;
30             ftpClientRequest.UseBinary = true;
31             ftpClientRequest.UsePassive = true;
32             ftpClientRequest.Method = method;
33 
34             //ftpClientRequest.Timeout = -1;
35 
36             return ftpClientRequest;
37         }
38    #region 支持断点续传
39 
40         public bool UploadFile(string sourceFile, Uri destinationPath, int offSet,string ftpMethod)
41         {
42             try
43             {
44                 FileInfo file = new FileInfo(sourceFile);
45                 Uri uri = new Uri(destinationPath.AbsoluteUri + "/" + file.Name);
46                 FtpWebRequest request = CreateFtpWebRequest(uri, ftpMethod);
47                 request.ContentOffset = offSet;
48                 Stream requestStream = request.GetRequestStream();//需要获取文件的流
49                 FileStream fileStream = new FileStream(sourceFile, FileMode.Open, FileAccess.Read);//创建存储文件的流
50                 int sourceLength = (int)fileStream.Length;
51                 offSet = CopyDataToDestination(fileStream, requestStream, offSet);
52                 WebResponse response = request.GetResponse();
53                 response.Close();
54                 if (offSet != 0)
55                 {
56                     UploadFile(sourceFile, destinationPath, offSet, WebRequestMethods.Ftp.AppendFile);
57                 }
58             }
59             catch(Exception ex)
60             {
61                 ex.ToString();
62                 return false;
63             }
64 
65             return true;
66         }
67 
68         private int CopyDataToDestination(Stream sourceStream, Stream destinationStream, int offSet)
69         {
70             try
71             {
72                 int sourceLength = (int)sourceStream.Length;
73                 int length = sourceLength - offSet;
74                 byte[] buffer = new byte[length + offSet];
75                 int bytesRead = sourceStream.Read(buffer, offSet, length);
76                 while (bytesRead != 0)
77                 {
78                     destinationStream.Write(buffer, 0, bytesRead);
79                     bytesRead = sourceStream.Read(buffer, 0, length);
80                     length = length - bytesRead;
81                     offSet = (bytesRead == 0) ? 0 : (sourceLength - length);//(length - bytesRead);                  
82                 }
83             }
84             catch(Exception ex)
85             {
86                 string error = ex.ToString();
87                 return offSet;
88             }
89             finally
90             {
91                 destinationStream.Close();
92                 sourceStream.Close();
93             }
94             return offSet;
95         }
96      #endregion
97     }//这里是一段上面的测试代码
private FtpClientService ftpClient; [TestMethod]
        public void UploadFileSupportFitfulTest()
        {
            ftpClient = new FtpClientService();
                       ftpClient.UploadFile(@"\\10.16.174.31\NeweggPictures\newEgg\ProdTourOff.gif", new Uri("ftp://10.16.50.189/SlaveImageServer/NewEgg/GroupFTPTest/"), 0, WebRequestMethods.Ftp.UploadFile);

Answer 3

前台页面源码： 
 <tr>
    <td class="td" style="height: 25px; width: 76px;">产品图片:</td>
    <td style="height: 25px"><input type="file" name="file5" id="upfile" runat="server" class="kuang" />(图片格式：.jpg,.gif)
      <input type="submit" name="Submit4" id="btnupfile" runat="server" value="上传"  class="btn" onserverclick="btnupfile_ServerClick"/>
        <asp:Label ID="lblproimage" runat="server" Text=""></asp:Label></td>
  </tr>===========================================================================================================后台代码：
 protected void btnupfile_ServerClick(object sender, EventArgs e)
    {
        HttpPostedFile hpf = this.upfile.PostedFile;
        string FileSize = Convert.ToString(Convert.ToInt32(hpf.ContentLength.ToString()) / 1024) + "KB";
        //取得文件名（不含路径）
        char[] de ={ '\\' };
        string[] AFilename = hpf.FileName.Split(de);
        string strFilename = DateTime.Now.ToString().Replace("-", "").Replace(" ", "").Replace(":", "") + AFilename[AFilename.Length - 1];
        if (strFilename.Substring(strFilename.LastIndexOf('.') + 1) == "jpg" || strFilename.Substring(strFilename.LastIndexOf('.') + 1) == "gif")
        {
            hpf.SaveAs(Server.MapPath(".") + "\\proimage\\" + strFilename);
            Session["FileName"] = strFilename;
            this.lblproimage.Text = "图片名：" + strFilename.ToString();
            ClientScript.RegisterStartupScript(this.GetType(), null, "<script>alert(\"图片上传成功！\");</script>");
            return;
        }
        else
        {
            ClientScript.RegisterStartupScript(this.GetType(), null, "<script>alert(\"图片格式不正确！\");</script>");
            return;
        }
    }

Answer 4

Socket自定义协议，用HTTP或FTP服务器，那就用Wininet函数相应的函数。