Try/Catch/Finally

[Kurt]

finally

 

Is the working of the following two pieces of code equivalent(concerning the code that's executed no matter an exception is thrown or not)? Or is there a difference other than pure syntactical dispute?

 

namespace Tests
{
using System;

public class tryApp
{
	private static void Main()
	{
		try
		{
			// some code that could throw an exception
		}
		catch
		{
			// handle the exception
		}
		finally
		{
			// run clean up code IN FINALLY BLOCK
		}
	}
}
}

 

namespace Tests
{
using System;

public class tryApp2
{
	private static void Main()
	{
		try
		{
			// some code that could throw an exception
		}
		catch
		{
			// handle the exception
		}
		// run clean up code OUT OF TRY BLOCK
	}
}
}

[Robby]

In the first one the Finally block is always run.

 

The second one will not if there's an error

Edited December 1, 2003 by Robby

[Kurt]

Both seem to work exactly the same to me

 

namespace Tests
{
using System;

public class tryApp
{
	private static void Main()
	{
		try
		{
			Console.WriteLine("Something is about to go wrong");
			int a = 6;
			int b = 0;
			Console.WriteLine("Division = {0}", a/b);
		}
		catch
		{
			Console.WriteLine("Let me handle this");
		}
		finally
		{
			Console.WriteLine("I always run...");
		}
		Console.WriteLine("And does this run?");
	}
}
}

[Robby]

Sorry I had it in mind that there was a Throw New in the Catch block, then it would not reach the last line

[Kurt]

Thanx, I see now... very important when rethrowing exceptions....

 

namespace Tests
{
using System;

public class tryApp
{
	private static void Main()
	{
		try
		{
			Console.WriteLine("Something is about to go wrong");
			int a = 6;
			int b = 0;
			Console.WriteLine("Division = {0}", a/b);
		}
		catch
		{
			Console.WriteLine("Let me handle this");
			throw;
		}
		finally
		{
			Console.WriteLine("I always run...");
		}
		Console.WriteLine("And does this run?");
	}
}
}

[Robby]

Now the line "And does this run?" will not run but the Finally block still does.

[Kurt]

Hi Robby,

 

I started this thread under the Systax Related subjects for C#, with thread name 'finally'. It seems to be moved to the general pages, but there it got the thread name "DataView RowFilter Hell". I have been reading on the "DataView RowFilter Hell" thread today, but I did not start that thread, and it handled about complete different subjects. Now, I find our discussion under the general subjects with thread name "DataView RowFilter Hell", of which I would be the thread starter.... Any idea whats going on?

[Robby]

Maybe you had accidentaly posted in that thread and a Mod split it into this one.

 

I have since correvted the title.