asp.net 使用ftp 上传 下载

chunjihong

　　/// <summary>/// FtpWeb 的摘要说明/// </summary>public class FtpWeb{string ftpServerIP;string ftpRemotePath;string ftpUserID;string ftpPassword;string ftpURI;/// <summary>/// 连接FTP/// </summary>/// <param name="FtpServerIP">FTP连接地址</param>/// <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>/// <param name="FtpUserID">用户名</param>/// <param name="FtpPassword">密码</param>public FtpWeb(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword){ftpServerIP = FtpServerIP;ftpRemotePath = FtpRemotePath;ftpUserID = FtpUserID;ftpPassword = FtpPassword;ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";}/// <summary>/// 上传/// </summary>/// <param name="filename"></param>public bool Upload(string filename, out string errorMsg){errorMsg = "";FileInfo fileInf = new FileInfo(filename);string uri = ftpURI + fileInf.Name;FtpWebRequest reqFTP;reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);reqFTP.KeepAlive = false;reqFTP.Method = WebRequestMethods.Ftp.UploadFile;reqFTP.UseBinary = true;reqFTP.ContentLength = fileInf.Length;int buffLength = 2048; //开辟2KB缓存区byte[] buff = new byte[buffLength];int contentLen;FileStream fs = fileInf.OpenRead();try{Stream strm = reqFTP.GetRequestStream();contentLen = fs.Read(buff, 0, buffLength);while (contentLen != 0){strm.Write(buff, 0, contentLen);contentLen = fs.Read(buff, 0, buffLength);}strm.Close();fs.Close();return true;}catch (Exception ex){errorMsg = ex.Message;return false;}}/// <summary>/// 下载/// </summary>/// <param name="filePath"></param>/// <param name="fileName"></param>public bool Download(string filePath, string fileName, out string errorMsg){errorMsg = "";FtpWebRequest reqFTP;try{FileStream outputStream = new FileStream(filePath + "//" + fileName, FileMode.Create);reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;reqFTP.UseBinary = true;reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();Stream ftpStream = response.GetResponseStream();long cl = response.ContentLength;int bufferSize = 2048;int readCount;byte[] buffer = new byte[bufferSize];readCount = ftpStream.Read(buffer, 0, bufferSize);while (readCount > 0){outputStream.Write(buffer, 0, readCount);readCount = ftpStream.Read(buffer, 0, bufferSize);}ftpStream.Close();outputStream.Close();response.Close();return true;}catch (Exception ex){errorMsg = ex.Message;return false;}} }