Question

We have files sent to our FTP (windows server 2008 R2), and one of our services pick the file for processing. The files being to our FTP are of the order 500 MB and more..
How can determine in C# that the file has completed copying into the FTP directory? I dont want to read it while the file is still being copied.

Answer 1

Try and take an exclusive lock on reading it

string filename = "Test.txt";

try
{
   using(FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.None))
   {
      // Read content here
   }
}
catch(IOException)
{
    // Occurs if the file cannot be exclusively locked.
}