Comboboxes not presenting text after setting value

Question

0.00/5 (No votes)

See more:

This is weird and I cannot find an answer to this. I have a form with several controls on it, of which there are three Comboboxes. There is also a datagrid where selecting a row in the datagrid provides editable details in the form controls below. The funny thing is that one of the comboboxes gets populated whilst the other two don't. I've checked it programatically and the item being selected by the set value is correct and contains all the right information but the text area of the box is blank.

Change the selection on the combobox manually, then restart the whole selection on the grid again and presto things work!

BTW, by setting value I mean along the lines of

MyCombo.SelectedValue = ((MyItem)MyDatagridView.DataboundItem).MyComboValue;

(Of course, its a bit more complicated and complete than the snippet above :) )

The comboboxes are databound and the data is correct.

Another thing I might add is that the SelectedIndex remains 0 when it should be something else. (That basically summarizes my whole predicament)

Any ideas?

Posted 19-Aug-10 11:14am

Mustafa Ismail Mustafa

Updated 19-Aug-10 11:19am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

AspDotNetDev · Answer 1 · 2010-08-19T11:26:00

Solution 1

Perhaps try setting both SelectedValue and SelectedText? Or maybe you'd have better luck setting SelectedIndex.

Posted 19-Aug-10 11:26am

AspDotNetDev

Comments

AspDotNetDev 19-Aug-10 17:42pm

If you only know the value and not the index, loop through all the values until you find the correct one, remember that index, then set SelectedIndex to that index.

Mustafa Ismail Mustafa 19-Aug-10 19:07pm

Oh man, talk about taking a few steps back! :)

I just tried setting the index, out of frustration ya dig, and still no go. I have found that until I have manually altered the selection on the front end, nothing will happen. Once I have changed it manually, things work right which is not making any sense to me.

I think I will be setting the text as well, but that has to be a temp solution.

AspDotNetDev 19-Aug-10 19:24pm

Perhaps you need to databind before you set the index. And perhaps the reason it seems to be working the second time, is because you are databinding then (and the subsequent index setting works). If you are using AJAX (e.g., update panels), that can cause some havoc as well.

AspDotNetDev 19-Aug-10 21:56pm

Oh, you're not using ASP.Net... duh :-P