Getting negitive Number

Can somoen please explain to me why I would get a negative number if I enter 355 into the textbox.

Private mdblHouseSqFt As Double = 0
Select Case txtHomeSqFt.Text
            Case 0 To 1000
                mdblHouseSqFt = txtHomeSqFt.Text * 0.1
            Case 1001 To 2000
                mdblHouseSqFt = ((txtHomeSqFt.Text - 1000) * 0.11) + 100
            Case 2001 To 3000
                mdblHouseSqFt = ((txtHomeSqFt.Text - 2000) * 0.12) + 210
            Case 3001 To 4000
                mdblHouseSqFt = ((txtHomeSqFt.Text - 3000) * 0.13) + 330
            Case Else
                mdblHouseSqFt = ((txtHomeSqFt.Text - 4000) * 0.14) + 460
        End Select
txtTaxOnHome.Text = mdblHouseSqFt

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mike TomlinsonMiddle School Assistant TeacherCommented:
Because you are using a string as the case parameter but the values in your case statements are numbers so it is jumping to the Case Else all the time.


    Select Case txtHomeSqFt.Text


    Select Case CInt(txtHomeSqFt.Text)


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Visual Basic.NET

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.