how to get ID from file

ho开发者_C百科w to get 3 from 3.hpdf

if it is a big int then how can i get it

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There is a function for that:

  string name = System.IO.Path.GetFileNameWithoutExtension(fileName);
  int id = int.Parse(name);

That only works if your filenames look like 12345.hpdf

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I think this will be helpful.

System.IO.Path.GetFileNameWithoutExtension(filename);