a616652325 发表于 2015-5-29 11:48:05

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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