Lottery Program Help...I'm using 2005 Visual Basic

psycoblaster · May 23rd, 2007, 01:42 AM

Thx I got everything done, but I have the last one problem. I got everything, except one thing.
Everytime I type in a letter in a textbox, it would make an error pointing out this code:

Code:

    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
        If TextBox1.Text = "" Then
            TextBox1.Text = 0
        End If
        If TextBox1.Text > 45 Then

            If MsgBox("0~45", MsgBoxStyle.Exclamation, "Change number") = MsgBoxResult.Ok Then
                TextBox1.Text = 0
            End If
        End If
        If TextBox1.Text = "" Then
            TextBox1.Text = 0
        End If
    End Sub

It would highlight the Textbox1.Text > 45 part.
THis is the part when I type in something higher than 45, a thing comes out where it says the number should be 0~ 45.

gbianchi · May 23rd, 2007, 07:33 AM

well.. if you enter a letter (or a space, or a comma) it will try to cast the text to a number and fail, ("a" is not a number), so you have to choice:
Get from internet a textbox that only accepts numbers or,
try to verify is the box only has numbers, and if not reject the change (you can do this in the keydown event, see wich key the user press, and if not a number cancel the press)...

HTH

Gonzalo

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psycoblaster · May 23rd, 2007, 06:30 PM

you know on visual basic 5.0 or 6.0 there is an "isnumeric = True/False" thing, is there such stuff on visual basic 2005??

gbianchi · May 23rd, 2007, 09:13 PM

the isnumeric function still exist inside the namespace Microsoft.VisualBasic
(http://msdn2.microsoft.com/en-us/lib...w1(vs.80).aspx)

but you better use double.tryparse (doesn't return an error, is just return a boolean)
http://support.microsoft.com/?scid=k...9488&x=14&y=20

HTH

Gonzalo

================================================== =========
Read this if you want to know how to get a correct reply for your question:
http://www.catb.org/~esr/faqs/smart-questions.html
^^Took that from dparsons signature and he Took that from planoie's profile
================================================== =========
My programs achieved a new certification (can you say the same?):
WORKS ON MY MACHINE
http://www.codinghorror.com/blog/archives/000818.html
================================================== =========
I know that CVS was evil, and now i got the proof:
http://worsethanfailure.com/Articles...-Hate-You.aspx
================================================== =========