基于Fileupload控件的FTP上传

最新推荐文章于 2024-06-17 13:59:35 发布

mark4ever

最新推荐文章于 2024-06-17 13:59:35 发布

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分类专栏：【.NET】文章标签： string stream null buffer byte class

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本文介绍了一个用于FTP文件上传及删除的.NET类库实现。该类库使用FtpWebRequest和FtpWebResponse处理文件的上传与删除操作，并通过Stream对象读取和写入文件内容。文章提供了详细的代码示例及配置说明。

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调用页面:先放一个FileUpload控件:

string filename = chdFtp.UniqueName(FileUpload1.FileName); chdFtp one = new chdFtp(filename, FileUpload1.PostedFile.InputStream); //Fileupload的文件PostedFile的返回流InputStream bool ftpUpdateFlag = one.UploadVideo();

类库:

using System; using System.Collections.Generic; using System.Configuration; using System.Linq; using System.Text; using System.Net; using System.Net.Sockets; using System.IO; using System.Threading; namespace CHDFTP { /* Coder:Mark Time:2011.04.28 描述:实现FTP上传，删除，主要用到两个Stream流，_localfile获得上传文件的对象，_uploadstream创建FTP上传流，对应FtpWebRequest.GetRequestStream(); 实际操作是uploadRequest.GetResponse()方法; */ public class chdFtp { const int _bufferLength = 2048; //2K缓冲区 byte[] Buffer = new byte[_bufferLength]; int contentLen = 0; private string _ftpserverip = ConfigurationManager.AppSettings["ServerIP"].ToString(); private string _ftpvideoid = ConfigurationManager.AppSettings["FtpID"].ToString(); private string _ftpvideopwd = ConfigurationManager.AppSettings["FtpPwd"].ToString(); private string _fileName; private FtpWebRequest uploadRequest = null; private FtpWebResponse uploadRespose = null; Stream _localfile = null; Stream _uploadstream = null; public chdFtp(string fileName) { this._fileName = fileName; } public chdFtp(string fileName,Stream fs) { this._fileName = fileName; this._localfile = fs; } public bool UploadVideo() { uploadRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(string.Format(@"ftp://{0}/{1}", _ftpserverip, _fileName))); //设定上传文件的路径与文件名，默认是FTP根目录 uploadRequest.Credentials = new NetworkCredential(_ftpvideoid, _ftpvideopwd); //提供账号密码的验证 uploadRequest.KeepAlive = false; //默认为true是上传完后不会关闭FTP连接 uploadRequest.ReadWriteTimeout = 300000; //默认300000ms，5分钟 uploadRequest.Method = WebRequestMethods.Ftp.UploadFile; uploadRequest.UseBinary = true; //默认true，表示传输文件是二进制流，false表示是文本文档。 try { _uploadstream = uploadRequest.GetRequestStream(); do { contentLen = _localfile.Read(Buffer, 0, _bufferLength); _uploadstream.Write(Buffer, 0, contentLen); } while (contentLen != 0); _uploadstream.Close(); //必须先关闭stream流才可以进行上传。 uploadRespose = (FtpWebResponse)uploadRequest.GetResponse(); } catch (UriFormatException ex) { return false; } catch (IOException ex) { return false; } catch (WebException ex) { return false; } finally { if (uploadRespose != null) uploadRespose.Close(); if (_localfile != null) _localfile.Close(); if (_uploadstream != null) _uploadstream.Close(); } return true; } public bool DeleteVideo() { uploadRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(string.Format(@"ftp://{0}/{1}", _ftpserverip, _fileName))); uploadRequest.Credentials = new NetworkCredential(_ftpvideoid, _ftpvideopwd); //提供账号密码的验证 uploadRequest.KeepAlive = false; //默认为true是上传完后不会关闭FTP连接 uploadRequest.Method = WebRequestMethods.Ftp.DeleteFile; try { uploadRespose = (FtpWebResponse)uploadRequest.GetResponse(); } catch (UriFormatException ex) { return false; } catch (IOException ex) { return false; } catch (WebException ex) { return false; } finally { if (uploadRespose != null) uploadRespose.Close(); if (_localfile != null) _localfile.Close(); if (_uploadstream != null) _uploadstream.Close(); } return true; } public static string UniqueName(string fileName) { string GUID = Guid.NewGuid().ToString(); string extensionName = Path.GetExtension(fileName); GUID += extensionName; return GUID; }

因为编译为类库，所以需要在web.config中的AppSettings节插入字段"ServerIP"表示IP地址，“FtpID”表示登录账户，“FtpPwd"表示登录密码。也可以直接按普通类进行调用，自己修改代码传入参数。需要优化的地方就是还未进行异步调用