C#Ftp的下载实例
publicclass FTPClient{
privatestring ftpServerIP="";//下载的ip
private string ftpUserID="";//用户名
private string ftpPassword=""; //密码
//带参的构造函数
public FTPClient(string ftpServerIP, string ftpUserID, string ftpPassword)
{
this.ftpPassword=ftpPassword;
this.ftpUserID = ftpUserID;
this.ftpServerIP = ftpServerIP;
}
///
/// 下载的方法
///
/// 要下载的路径
/// 要下载的文件名，如果为空，则代表文件下的全部文件
publicvoid Download(string filePath, string fileName)
{
FtpWebRequest reqFTP;
try
{
FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create); //文件流暑促文件
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName)); //创建ftpWebRequest
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile; //ftp的方法，上传还是下载
reqFTP.UseBinary = true; //是否使用二进制
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword); //输入用户名和密码
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();//获取文件流
long cl = response.ContentLength; //文件流的长度
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte; //字节转换
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize); //读取文件
}
ftpStream.Close();
outputStream.Close();
response.Close();
System.GC.Collect();
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
}
}
}
上面是FTp的后台服务端，下面是应用客户端：
ftpServerIP = "192.168.2.211/Test/ssl/Image";
ftpUserID = "123456";
ftpPassword = "123456";
FTPClient ftpClient = new FTPClient(ftpServerIP, ftpUserID, ftpPassword);
ftpClient.Download(@"C:\picture", "3201.png");
客户端可以输入ip,用户名，密码，要下载的路径或者有下载的文件，就可以执行了。如果下载文件为空，则代表下载ip底下的所有文件。
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