 Multi-column Listbox Bug *confirmed*, Cannot select large item lists. |
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  Jan 14 2004, 02:35 AM
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 Confucius say: Crowded elevator always smell different to midget   Admin  Posts: 2367 Joined: 13-October 02 From: Planet Earth Member No.: 2 Using LabVIEW Since:1994 LV:8.5 ,8.2.1 ,7.1.1 
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This is a confirmed bug from NI support that was just recently reported. I'm surprised that it hasn't popped-up earlier than this.
Create a multi-column listbox with about 5 columns and 1000 rows of data. Make sure you have 1 or more items selection capability enabled. Now using the selection tool (finger) click on the first row then scroll to the bottom of the list and shift-click the last row. This effectivly selects - highlights ALL rows. After doing this, LabVIEW hangs. At first I thought that LabVIEW crashed but eventually it comes back and displays the selection. It seems to take longer to come back with the more rows of data you select. Regardless, this is definitly an issue since no-one will wait 5 minutes or more for a user interface to respond. In all essence LabVIEW is crashed.
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Jan 14 2004, 02:35 AM
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Apr 30 2006, 01:10 PM
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One hit wonder! Member Posts: 1 Joined: 27-April 06 Member No.: 4875 LV:7.0 
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QUOTE (Michael_Aivaliotis @ Jan 14 2004, 02:35 AM)  This is a confirmed bug from NI support that was just recently reported. I'm surprised that it hasn't popped-up earlier than this. Create a multi-column listbox with about 5 columns and 1000 rows of data. Make sure you have 1 or more items selection capability enabled. Now using the selection tool (finger) click on the first row then scroll to the bottom of the list and shift-click the last row. This effectivly selects - highlights ALL rows. After doing this, LabVIEW hangs. At first I thought that LabVIEW crashed but eventually it comes back and displays the selection. It seems to take longer to come back with the more rows of data you select. Regardless, this is definitly an issue since no-one will wait 5 minutes or more for a user interface to respond. In all essence LabVIEW is crashed. I too came across this problem, and the only advice I could find was not to use this listbox in labview. So on the strength of this I decided to build my own activex version of the MFC CListCtrl with integrated sort functions. So if anyone is interested in using my new control just send me an email to mjkilloran@hotmail.com. QUOTE (Michael_Aivaliotis @ Jan 14 2004, 02:35 AM) This is a confirmed bug from NI support that was just recently reported. I'm surprised that it hasn't popped-up earlier than this. Create a multi-column listbox with about 5 columns and 1000 rows of data. Make sure you have 1 or more items selection capability enabled. Now using the selection tool (finger) click on the first row then scroll to the bottom of the list and shift-click the last row. This effectivly selects - highlights ALL rows. After doing this, LabVIEW hangs. At first I thought that LabVIEW crashed but eventually it comes back and displays the selection. It seems to take longer to come back with the more rows of data you select. Regardless, this is definitly an issue since no-one will wait 5 minutes or more for a user interface to respond. In all essence LabVIEW is crashed. I too came across this problem, and the only advice I could find was not to use this listbox in labview. So on the strength of this I decided to build my own activex version of the MFC CListCtrl with integrated sort functions. So if anyone is interested in using my new control just send me an email to mjkilloran@hotmail.com. Mike This post has been edited by AlfredsFutterKiste: Apr 30 2006, 01:14 PM
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Apr 30 2006, 01:27 PM
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 I'm a LAVA, not a fighter. V I Engineering, Inc.  Posts: 3751 Joined: 13-October 03 From: Michigan, USA Member No.: 181 Using LabVIEW Since:1993 LV:8.5 ,. ,. 
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QUOTE (AlfredsFutterKiste @ Apr 30 2006, 11:10 PM) ...I decided to build my own activex version of the MFC CListCtrl with integrated sort functions... Here's a link to a native LabVIEW VI that'll sort your multi-column listboxes. -------------------- 
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Jun 8 2006, 01:01 PM
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 Instant Human, just add coffee Premium Member  Posts: 889 Joined: 31-January 03 From: Waterford, CT USA Member No.: 45 Using LabVIEW Since:1992 LV:8.2.1 ,7.1 ,8.0.1
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For short to medium lists I use the listboxes, but for long lists I have only used tables/arrays for some time now. I never quite noticed a hang, but there has been an obvious performance lag for some time now.
In a few cases where I really wanted certain listbox features and better performance I kept most of the list off screen in arrays and only parsed out a portion to display in the listbox at any one time. This takes a bit more housekeeping, but worked around the bug Michael points out. -------------------- ************************************************************* "Always listen to the experts, they'll tell you what can't be done, and why. Then go do it." ~The Notebooks of Lazarus Long (by Robert Heinlein) *************************************************************
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