IsNumeric function on an empty field.

23 Sep 2006 3:36 AM

James

Simple question...

If you execute a block of statements that uses the IsNumeric function
on a text box that contains no data, will it cause a run time error?
Thanks

looks like this:

If IsNumeric(txtInput.Text) = True Then
            MessageBox.Show("Numeric entry found")
        Else
            MessageBox.Show("Non-numeric entry found", _
                                        "Compound If") :
btnClear.Focus()
        End If

I think this could be a possible test question and i just want to
understand what would happen. Thanks!

23 Sep 2006 9:39 AM

Oenone

James wrote:

> If you execute a block of statements that uses the IsNumeric function
> on a text box that contains no data, will it cause a run time error?

Why don't you try it and see?

--

(O)enone

25 Sep 2006 3:20 PM

Chris Dunaway

James wrote:

> If you execute a block of statements that uses the IsNumeric function
> on a text box that contains no data, will it cause a run time error?
> Thanks

As Oenone posted, you could have coded this up in about 2 minutes
instead of waiting all this time for a response from someone else. I
know I am guilty of this every once in awhile, but I try to test things
myself first.

In any event, you can also use the TryParse method of most numeric
types to try the conversion.