Solved

.net set focus on control without submitting form

Posted on 2013-10-29
6
384 Views
Last Modified: 2013-10-30
I want to promp user to input resolution before submit a form.  How can I set focus on the resolution textbox and without submitting form if the resolution textbox is empty.

The app is in vb.net, I think I need the code in vb.net.  Thanks.
0
Comment
Question by:5281
  • 3
  • 3
6 Comments
 
LVL 8

Expert Comment

by:Barry62
ID: 39609648
Private Sub btnSubmit_Click(sender As Object, e As EventArgs) Handles btnSubmit.Click
      if txtResolution.text = String.empty() Then
          MessageBox.Show("Please enter a resolution", "No Resolution Entered", MessageBoxButtons.OK, MessageBoxIcon.Error);
      Else
          <Process Form...>
      End If
End Sub
0
 

Author Comment

by:5281
ID: 39609713
when I moved your code in my Visual Studio, somehow, I have error under String.Empty() and MessageBox

String.Empty() - Error 100 Argument not specified for parameter 'index' of 'Public ReadOnly Default Property Chars(index As Integer) As Char'.      

MessageBox - Error      101 'MessageBox' is not declared. It may be inaccessible due to its protection level.      

What happened?  This is asp.net web application.
0
 
LVL 8

Expert Comment

by:Barry62
ID: 39609731
Sorry, try changing the sub to Public.

You said it was vb.net
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 

Author Comment

by:5281
ID: 39609794
It is still same errors after change sub to Public.
0
 
LVL 8

Accepted Solution

by:
Barry62 earned 500 total points
ID: 39609809
String.Empty()

Since this is asp.net, not vb.net, you'll have to use javascript alert() instead of MessageBox
0
 

Author Comment

by:5281
ID: 39611382
That's what I thought too.  I got it now.  Thank you.
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

825 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question