Exception is thrown, but for loop doesn't continue.

Question

Hello, I am trying to get all the files in the program files directory, but some of the files are being used by another process and when I come across a file that is being used, the System.IO.IOException is thrown, but I have a try - catch block and catch the error. After I enter error handling mode and complete error handling mode, the program just exits the void. It doesn't continue to the next file in the for loop. Any Help? Thanks.

-John

Answer 1

There are several possibilities; the try catch might be in the wrong place, another exception might be thrown in the catch block, you might be breaking the file enumerator, just to name a few. Without looking at the code in question it's really hard to say.

Thanks
--mc

Answer 2

Hello,

Is the try/catch inside the loop or outside of the loop? It makes a difference.

Adam

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Ctrl+Z

Answer 3

try

{

  String[] files = System.IO.Directory.GetFiles(Enviroment.GetFolderPath(Enviroment.SpecialFolder.ProgramFiles), "*.*", SearchOption.AllDirectories);

/* Code Removed */

}

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

Answer 4

try {
 for( int i=0; i<10; i++ ) {
  Console.WriteLine( i );
  throw new Exception( "boom!" );
 }
} catch( Exception x ) {
 Console.WriteLine( x );
 // execution does not return into the try block
}

This outputs 0 then the exception message.  it doesn't keep going 1 exception 2 exception 3 exception, etc..

There's no "resume" for exceptions.

If you wanted to catch and continue the loop, then the try must be inside the loop.

for( int i=0; i<10; i++ ) {
 try {
  Console.WriteLine( i );
  throw new Exception( "boom!" );
 } catch( Exception x ) {
  Console.WriteLine( x );
  // execution still does not return into the try block, but
  // the loop continues and a new try block is entered on the
  // next pass.
 }
}

This outputs 0 exception 1 exception 2 exception, etc...

 

Answer 5

Outside

Answer 6

Outside

That's why. Put it inside the loop.

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Ctrl+Z

Answer 7

Debugging the program right now. Thanks!