• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 730
  • Last Modified:

enable button control with textbox textchanged event

Below is code for trying to change a button control for button.enabled = true and false depending on condition.  I am trying to changed the enabled state of the button control when the text in a separate text box changes.  When called the code fires but nothing happens on the page.

Can anyone help?

Thanks,

Protected Sub DataEntry1_TextChanged(sender As Object, e As EventArgs) Handles DataEntry1.TextChanged

        If Not IsNumeric(DataEntry1.Text) Then
            EnterDataBtn.Enabled = False
            ViewState("BtnEnabled") = False
        Else
            EnterDataBtn.Enabled = True
            ViewState("BtnEnabled") = True
        End If

    End Sub
0
rckrch
Asked:
rckrch
3 Solutions
 
MajorBigDealCommented:
Try removing the ViewState lines. I just tried it and the button was disabled fine without them.  Also, try removing the numeric check just to see if you are able to disable the button on the text changed event (which worked fine for me).  If so, then the problem is probably that you are taking the other branch of the if-then-else statement then the one you expect.
0
 
Chinmay PatelEnterprise ArchitectCommented:
Also this will cause a PostBack I suggest you either take it to client side or use AJAX. What are you trying to achieve? if it needs to be server side validation I will strongly suggest to use AJAX so that user doesn't see a Postback.
0
 
SAMIR BHOGAYTAFreelancer and IT ConsultantCommented:
hi..

Try with Postback property of a textbox equal to true. It's working.
0
 
Kamal KhaleefaInformation Security SpecialistCommented:
in the aspx page set the property AutoPostBack=true
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now