Solved

check if combo box has selection vb.net

Posted on 2016-08-01
5
318 Views
Last Modified: 2016-08-01
i have 3 combo boxes on a form  in vb.net. the 3rd combo needs the selection from both of the previous. How do i check that both cb1 and 2 have items selected?
there is no order of selection the user can change 1 or 2 in either order as long as i can make cb3 respond
0
Comment
Question by:PeterBaileyUk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 

Author Comment

by:PeterBaileyUk
ID: 41737456
I just wrote this
  If (String.IsNullOrEmpty(CBNote.SelectedItem)) And (String.IsNullOrEmpty(CBScaleType.SelectedItem)) Then
            Call GetCBData("usp_GetChords")
        End If

not sure if its correct way
0
 

Author Comment

by:PeterBaileyUk
ID: 41737457
apart from the blinding obvious that i need an else and need to move the call to the correct part
0
 
LVL 63

Accepted Solution

by:
Fernando Soto earned 500 total points
ID: 41737468
You can use the ComboBox.SelectedIndex property to know if a item has been selected in the ComboBox. It returns the zero base index of the selected item or if no item has been selected -1.
0
 

Author Closing Comment

by:PeterBaileyUk
ID: 41737472
I did try and ceremoniously failed. thx again
0
 
LVL 63

Expert Comment

by:Fernando Soto
ID: 41737474
Did you get it working?
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Ready to improve network connectivity? Watch this webinar to learn how SD-WANs and a one-click instant connect tool can boost provisions, deployment, and management of your cloud connection.

Question has a verified solution.

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

If you're writing a .NET application to connect to an Access .mdb database and use pre-existing queries that require parameters, you've come to the right place! Let's say the pre-existing query(qryCust) in Access takes a Date as a parameter and l…
It’s quite interesting for me as I worked with Excel using vb.net for some time. Here are some topics which I know want to share with others whom this might help. First of all if you are working with Excel then you need to Download the Following …
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…

717 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