How to read the last line of a file in Managed C++

How to read the last line of a file in Managed C++

• Stan Spotts

  Ok, for now I resolved with this:
  
  DateTime getLastDateTimeFromFile(String* fileName){
      StreamReader* sr = File::OpenText(fileName);
  
      String *lastLine, *input;
      while((input=sr->ReadLine())!=NULL){
          lastLine = input;
      }
      return lastLine->Substring(0, 10)->ToDateTime(NULL);
  }
  
  But as I said is very inefficient cause the file has A LOT of lines. Still searching and please help!
  
  
  

• mukri743

  I believe you can use the FileStream class (System.IO.FileStream) where it supports randon access to files.
  
  Here is a link for the class itself:
  http://msdn2.microsoft.com/library/y0bs3w9t(en-us,vs.80).aspx
  
  Also, the class provides a Seek method that can be used for your purpose. Take a look at the below link, it includes some samples:
  http://msdn2.microsoft.com/library/hfkdy2ws(en-us,vs.80).aspx
  
  Hope this helps!
  
  Thanks,
    Ayman.
  
  

• boharp

  Try to use: FileStream::Seek( Offset, SeekOrigin::End )
  
  FileStream^ fs = gcnew FileStream( "path", FileMode::Open );
  fs->Seek( -4,  SeekOrigin::End );
  
  This the file pointer to the last 4 bytes from the end back of the file.
  
  Bye
  Martin
  
  
• How to read the last line of a file in Managed C++