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MultiColumnComboBoxElement.DropDownHeight not working

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ComboBox and ListBox (obsolete as of Q2 2010)
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Jason
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Jason asked on 11 Mar 2009, 01:59 PM
I am unable to set the height of the drop down any larger than 1 header row and 3 lines using the following assignment
ctlRadMultiColumnComboBox.MultiColumnComboBoxElement.DropDownHeight = 500.

So is this a bug.

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Nick
Telerik team
answered on 12 Mar 2009, 07:27 PM
Hello Jason,

You are correct - this is a bug. We are going to research the issue and provide a fix in one of our future releases.
 

All the best,
Nick
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Sean
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answered on 31 Aug 2010, 06:12 PM
I am using the Q1 2010 release and setting the DropDownHeight on a radCombobox control has no effect.

Was this bug addressed in the Q1 2010 release?  If not then can you please provide a workaround to set the drop down height?

Thanks,
Sean
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Martin Vasilev
Telerik team
answered on 03 Sep 2010, 02:55 PM
Hi Sean,

Thank you for writing.

Actually we have addressed the drop-down height issue and in my  tests the height was applied as expected. However, there could be something specific in your scenario that causes the issue. Please, open a new support ticket and send me a small example project that demonstrates your scenario. This will help me to investigate the case in details and provide you with further assistance.

Best wishes,
Martin Vasilev
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Sean
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answered on 06 Apr 2011, 06:56 PM
This doesn't appear to have been fixed in Q1 2010.  However, I did find a workaround (for anyone who is interested). 

You have to force the drop down height in the DropDownOpening event of the combobox:

Private Sub RadCombobox1_DropDownOpening(ByVal sender As Object, ByVal args As System.ComponentModel.CancelEventArgs) Handles RadCombobox1.DropDownOpening
  
        RadCombobox1.ComboBoxElement.ComboPopupForm.Height = RadCombobox1.DropDownHeight
  
    End Sub

Hope this helps.

-Sean
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Martin Vasilev
Telerik team
answered on 11 Apr 2011, 05:06 PM
Hi Sean,

Thank you very much for sharing your work-around with us. However I highly recommend you upgrading to the latest version: Q1 2011 (2011.1.11.315). It contains numerous improvements and bug-fixes and also DropDownHeight property works as expected.

All the best,
Martin Vasilev
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Sean
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answered on 12 Apr 2011, 03:52 PM
Martin,
I appreciate your suggestion, however the application that I am working on has around 35,000 lines of code.  We rely heavily on the Telerik controls, and we have had to do A LOT of customization and workarounds for bugs with the controls.  It is simply not feasible to ask your users to upgrade to the latest version every quarter when a new release comes out.  This would require several weeks worth of coding and testing from my team to ensure that everything still works as intended.  Also, it has been my experience that when a new release comes out there are other bugs that have been introduced, so then we have to find workarounds for those issues.  I suspect that a large number of your users are in a similar situation, where they can't simply upgrade every 3-6 months. 

Overall, I think that Telerik does a great job with all the tools you provide, but that is one complaint that I have.  You end up getting "locked in" to a particular version of the controls, and due to all the workarounds (most provided by Telerik here on the Forums and through support tickets) it is very cumbersome to upgrade.

I was just including the workaround for anyone who in the same boat as me.

Thanks,
Sean
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Martin Vasilev
Telerik team
answered on 15 Apr 2011, 12:47 PM
Hello Sean,

Thank you for your feedback.

I agree you have some strong points here and I can understand upgrading to the latest version could be a costly process in terms of time and resources. However our target is constantly refining our products and there are vast improvements between latest version and the one you are currently using. That is why I am recommending to consider moving forward and upgrading your solution. If you decide to do that we are wiling to provide you with required support on any difficulties, which you could encounter.

Nevertheless, I would like to thank you for sharing your work-around for the older version with the community and I am updating your Telerik points for that. Do not hesitate to contact us again if you have any other questions.

Regards,
Martin Vasilev
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ComboBox and ListBox (obsolete as of Q2 2010)
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Jason
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Nick
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Sean
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Martin Vasilev
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