check if number

[pilsjart]

I have the tipical "check if valid" in a TextFiled

How can I Check if a String is a number... (int or double)


If isNotNumber(MyString) Then
ThisTextField.SetFocus()

[si_the_geek]

This will check that any text is a number:

If Not isNumeric(MyString) Then
  ThisTextField.SetFocus()
End If

and this will do the same, plus make sure that something has been entered (the above will allow empty text)

If (Not isNumeric(MyString)) Or (MyString = "") Then
  ThisTextField.SetFocus()
End If