通过Windows应用程序检查远程文件夹上的文件

Question

I am using VS-2008 [C#] with .NET 3.5 SP1 installed.

I am writing an auto-update utility for my application. I want to connect via FTP and search for the files on the remote server. I want to check the versions of the local and remote file. As expected, if new files are on server, display alert.

I started with following code:

FtpWebRequest ftpRequest = (FtpWebRequest)WebRequest.Create("ftp://ftp.mysite.com//myFiles");
try
{
    ftpRequest.Credentials = new NetworkCredential("new user", "new password");
    ftpRequest.Method = WebRequestMethods.Ftp.GetDateTimestamp;
    DateTime FtpFileLastModified = ((FtpWebResponse)ftpRequest.GetResponse()).LastModified;
}
catch (Exception)
{
    throw;
}  

I want to know which is a recommended method to perform this type of task in .NET 3.5 SP1 . Please illustrate with a little code.

Answer 1

您可以使用FileSystemWatcher类-侦听文件系统更改通知，并在目录或目录中的文件更改时引发事件。