Checking for numeric value entered in text box in Visual Basic

Question

I am working on a program for my Visual Basic class and have a quick question. One of the things we were encouraged to do was to check to make sure the quantity entered in a

Answer 1

Use Regex.IsMatch:

Public Function isNumeric(input As String) As Boolean
    Return Regex.IsMatch(input.Trim, "\A-{0,1}[0-9.]*\Z")
End Function