使用ftp上传文件和下载文件---C#

// ftp 文件上传，fileName：要上传的文件，fileNewname：要在服务器上保存的名称

private void Upload(string fileName, string fileNewname)

{

string strFileName = "";

// 获取文件的相关信息

FileInfo fileInf = new FileInfo(fileName);

if (fileNewname == "")

{

strFileName = fileInf.Name;

}

else

{

strFileName = fileNewname;

}

// 根据uri创建FtpWebRequest对象

FtpWebRequest reqFTP;

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://127.0.0.1/" + strFileName));

// ftp用户名和密码

reqFTP.Credentials = new NetworkCredential("yans1", "123456");

// 销毁到服务器的连接

reqFTP.KeepAlive = true;

// 获取或设置要发送到 FTP 服务器的命令。

reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

// 传输文件的数据格式Binary

reqFTP.UseBinary = true;

// 文件是多大

reqFTP.ContentLength = fileInf.Length;

// 缓冲大小设置为2kb

int buffLength = 2048;

byte[] buff = new byte[buffLength];

int contentLen;

try

{

Stream strm = reqFTP.GetRequestStream();

// 把文件读入到流中

FileStream fs = fileInf.OpenRead();

// 用于存储要由当前请求发送到服务器的数据。

// 把文件流分装成小的字节数组，防止占用太多的服务器内存

contentLen = fs.Read(buff, 0, buffLength);

// 循环把文件流写入待发给ftp服务器的请求流中

while (contentLen != 0)

{

strm.Write(buff, 0, contentLen);

contentLen = fs.Read(buff, 0, buffLength);

}

fs.Close();

strm.Close();

}

catch (Exception e)

{

Response.Write(e.Message.ToString());

}

}

// ftp 文件下载，filePath：保存在本地的路径，fileName：要下载的文件名称

private void Download(string filePath, string fileName)

{

// 声明请求

FtpWebRequest reqFTP;

reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://127.0.0.1/" + fileName));

// 销毁到服务器的连接

reqFTP.KeepAlive = true;

// 设置要发送的命令形式

reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

// 设置要2进制传递文件

reqFTP.UseBinary = true;

// 设置登陆的用户名和密码

reqFTP.Credentials = new NetworkCredential("yans1", "123456");

//try

//{

// 获取ftp给的响应

FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

Stream ftpStream = response.GetResponseStream();

// 建立本地保存文件流

FileStream outputStream = new FileStream(filePath + "/" + fileName, FileMode.Create);

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);

}

outputStream.Close();

ftpStream.Close();

response.Close();

//}

//catch (Exception e)

//{

// Response.Write(e.Message.ToString());

//}

}

// 获取ftp的目录下所有的文件列表

private string[] GetFileList()

{

StringBuilder result = new StringBuilder();

// 创建请求

FtpWebRequest reqFtp;

reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://127.0.0.1"+"/"));

// 设置请求的属性

reqFtp.KeepAlive = true;

reqFtp.Method = WebRequestMethods.Ftp.ListDirectory;

reqFtp.UseBinary = true;

// 设置用户和密码

reqFtp.Credentials = new NetworkCredential("yans1", "123456");

FtpWebResponse resFTP = (FtpWebResponse)reqFtp.GetResponse();

// 获取响应流

StreamReader read = new StreamReader(resFTP.GetResponseStream());

string line = read.ReadLine();

while (line != null && line != "")

{ // 判断是文件件，还是文件

result.Append(line);

result.Append((char)1);

line = read.ReadLine();

}

// 去掉最后一个 字符

result.Remove(result.ToString().LastIndexOf((char)1), 1);

read.Close();

resFTP.Close();

return result.ToString().Split((char)1);

}