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Resolved How can Multi-select in DDDWs be done?

  1. How-to
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  1. John Sestak
    John Sestak
  2. PowerBuilder
  3. Tuesday, 17 January 2023 18:35 PM UTC

What is the best method multi-select in dropdown DWs be accommodated for users.  This is an important issue for our reporting.  It does not appear to be a native PB functionality for DDDWs.

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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Tuesday, 17 January 2023 18:53 PM UTC
  2. PowerBuilder
  3. # 1

You have to simulate the functionality, as the DW is not designed to do this. I found this example by doing a web search:

   https://programmingmethodsit.com/knowledge-base/multiple-select-option-for-the-datawindow-dropdown-in-powerbuilder/

Best regards, John

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Linda Butler
  1. Linda Butler
  2. Wednesday, 18 September 2024 15:50 PM UTC
The above example 'multi-select-option-for-datawindow-dropdown....' works fine for datawindows that just have columns with DDDWs with multi-selection. I could not get this to work on a datawindow that just has other columns besides a dddw that needs mulit-selection. The 'Return 2' in itemchanged event prevented data in other columns to be accepted. I tried isolating when to return 2 on only when this event was triggered from ue_command. If I return 0, the multiselection in the dddw did not work. Has anyone used this on datawindows that have more than just the 'multiselection' dddw(s)?
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René Ullrich
  1. René Ullrich
  2. Thursday, 19 September 2024 04:31 AM UTC
You can easy limit the return 2 in itemchanged event to columns you want. For example:

if dwo.name = "mycolumn" then

...

end if
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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 18 January 2023 04:28 AM UTC
  2. PowerBuilder
  3. # 2

Hi John;

  FWIW: What I do on the "Drop" event of the DDDW is to intercept that user defined event, cancel the DDDW & instead, open a response dialogue. In that dialogue, I use a Tabular "List" DW where the App user can select more than one row. When the Response dialogue closes, I pass the multi-selection values back to the calling DWO / Window for processing.  Food for thought.  HTH

Regards ... Chris

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Mickey Hillel
Mickey Hillel Accepted Answer Pending Moderation
  1. Tuesday, 24 January 2023 11:47 AM UTC
  2. PowerBuilder
  3. # 3

Hi Chris.

Could you elaborate on the "drop" event (pbm_dwndropdown ? ), and how you cancel the dddw ? 

TIA

Mickey

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Mickey Hillel
  1. Mickey Hillel
  2. Tuesday, 24 January 2023 20:34 PM UTC
Thanks Rene & Chris for your suggestions. :-)
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Mickey Hillel
  1. Mickey Hillel
  2. Tuesday, 24 January 2023 20:59 PM UTC
I couldn't get the pbm_dwndropdown to trigger at all, but pbm_command with notificationcode = 256 seems to do the trick.
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René Ullrich
  1. René Ullrich
  2. Wednesday, 25 January 2023 06:51 AM UTC
I have no problem with pbm_dwndropdown. Check that you con't have two different events with this event id.
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