Field Validation in VB2005 winforms

  • Thread starter Thread starter Alex
  • Start date Start date
A

Alex

Hi,

I'm writing an app to test Enterprise Libraries in Visual Basic 2005,
and I have a question that hopefully someone has run across.

I'm passing text from my form to a class property setup as a Long, and
if I enter anything except a number it throws an InvalidCastException
trying to convert the String to a Long. I hoped I could fix this with
the Enterprise Library's Validation classes, and though they work if I
pass a number, the exception has already thrown by the time it gets to
the Ent Library classes.

Here's my code:

.... from cClass ...
<NotNullValidator()> _
<RangeValidator(1, RangeBoundaryType.Inclusive, 9999999999,
RangeBoundaryType.Inclusive, Ruleset:="RuleSetA",
MessageTemplate:="Loan ID must be 1 to 10 digits")> _
Property ID() As Long
Get
Return _ID
End Get
Set(ByVal value As Long)
_ID = value
End Set
End Property

.... from Form.vb ...
cClass .ID = txtID.Text

If I enter a text string "asdfasdfa" for example or "" in txtID.text,
it blows with the InvalidCastException . Entering a valid number
actually works and the Ent Libraries kick in, but i need to test the
string before that point.

Any suggestions?

Thanks --

Alex
 
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