Editing entries in multicolumn listbox

I am using a multicolumn listbox to display test parameters - ie columns of step number, temperature and time data. I read a previously created test matrix and update the listbox items names using the property node.
Is it possible to do the reverse - ie edit the item names while the app is running and save a new test matrix from the modified listbox?
Thanks,
Niel.

It seems impossible to edit list in the running time. However, could you try to use string table to do that?

Similar Messages

Entries into Multicolumn Listbox/Safing Data in .txt-file

Hello. I haven't found anything helpful for my problem or better to say problems. I have to do a task that I have no idea how to solve. It isn't helping that I was never good with programming. Here is what I have up till now:
I want to write seven strings indivudally into a multicolumn listbox with seven columns. The first shall be a running number, increasing for every row. For this I'm using right now a Case Structure. And there is my first problem. I don't know how to realize that whenever a row is completed the next string is written into the next row instead of overwriting one in the completed row.
This has to go one for as long as the user wants to. Then there has to come a Pop Up Window - if that's the correct term - and shall ask the user if he/she wants to safe the created list into a textfile. And that's my next problem. I have no idea how to program that.
I know it's probably rather easy to program these things in LabVIEW 8.0 (which I'm using) but as I've already said I'm anything but good in programming at all and to make things even more complicated I don't want to do this task, therefore not putting all my energy into it as a result.
Please, can someone here help me?

Does it have to be a multicolumn ListBox?
Seems like a table might be more appropriate, if it's only for display purposes.
Either way, you need to use a FOR loop inside a FOR loop to generate a 2-D array of strings.
The INNER loop generates the strings for each column in a row, the OUTER loop generates each row.
You wire the 2-D array directly to a TABLE indicator, or to the ITEM NAMES property of a ListBox.
Attached is a pic.
Message Edited by CoastalMaineBird on 08-21-2007 01:52 AM
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
Culverson.com
Blog for (mostly LabVIEW) programmers: Tips And Tricks
Attachments:
TwoLoop.png ‏226 KB

LabVIEW 8.2 Multicolumn Listbox Edit Cell Event Bug

I've observed an odd behavior with the "Edit Cell?" event with multicolumn listboxes. If the "Edit Position" is set when clicking on the listbox and the "Edit Cell?" event is trapped with discard set to false, when clicking outside of the list box, previous edits are lost. I have attached a simple example of this bug.
Attachments:
Listbox Edit Cell Event Bug.vi ‏19 KB

Thank you for the update Fran.
I lost my bet and you earned your stars.
So it sounds like the issue was the multiple event structures alone.
I just like to keep track of what the final fixes are.
Ben
Message Edited by Ben on 12-06-2006 04:50 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

How can I set font size of a column of Multicolumn Listbox at one time in edit mode?

HI,
I want to creat a Multicolumn Listbox with different font size in diffrent columns.
But I can only modify all cells or one cell font size at one time!
How can I do?
THANKS!

My labview version is 7.1.
I can't open the .vi you deliver.
And in LV7.1, I can't find fontsize setting in property node.
thank you all the same!
Attachments:
1111.JPG ‏27 KB

Help - Edit cell of a multicolumn listbox at run time

Hi All,
I am populating rows and columns of a multicolumn listbox from a file at run time. However, after the data is loaded in the listbox I want to have the option of changing cell value.
Can I do that? If so, how?
I appreciate your time and help.
Thanks,
Mim

Hi,
You have to use the property item names witch is a 2D string array.
Then replace the elements you want to change in that array and write it back to the table.
Check attachment.
Hope it helps,
Paulo
Attachments:
ChangeTableElements.vi ‏20 KB

Migration of multicolumn listbox from 7.1.1 to 8.5

I recently migrated a VI containing a multicolumn listbox from LV 7.1.1 to LV 8.5. Interestingly the 3D-headers got lost and the hight of the rowes changed.
Left in the picture is the LV 7.1.1 version and right is the LV 8.5 version. The font is set to Lucida Console 14 bold.
I got CAR 119444 for this conversion bug.
Message Edited by waldemar.hersacher on 07-10-2008 09:02 PM
Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
Don't forget to give Kudos to good answers and/or questions
Attachments:
multicolumnlistbox.png ‏2 KB

Hi Vicky,
No worries my friend
We have not done this upgrade and do not have any current plans to do so. I am
always, always, always slow to move along the upgrade path. This may be a bad thing
but it has saved us some great pain as well over the years. Our current versions are;
CUCM - 7.1(3b)su2
CUC - 7.1(3b)su2
We have found these versions to be very stable. I have spent a fair bit of time looking at people's
migrations to 8.5(x) here @ CSC and have not seen or heard of too many horror stories. This is one bug you'll
want to look out for.
CSCtn61453            Bug Details
Applying 8.5.1 software as patch results in corrupted CUC installation.
Symptom:
After fresh installation of 8.5.1 software, we can notice several problem symptoms.
- Connection services and Connection DB does not start
- System cannot be accessed via web page
- Informix error messages for certain CLI commands
Example :- show cuc cluster status
com.informix.asf.IfxASFException: Attempt to connect to database server (ciscounity) failed.
Command failed
Conditions:
It is observed during fresh installation of Unity Connection product when installation was
started with earlier version of software and 8.5.1 software was applied as a patch during the setup process.
Workaround:
First, perform a fresh installation of earlier version of software using the install media. Then after verifying the installation, proceed with the upgrade to 8.5.1 as a separate process.
Status
Open
Severity
2 - severe
Last Modified
In Last 3 Days
Product
Cisco Unity Connection
Technology
1st Found-In
8.5(1)ES1
Best of luck with your changes.
Cheers!
Rob

Add text to specified index in multicolumn listbox

Hi!
I have smal problem with multicolumn listbox. My application should
create list of values where user can increase and decrease values of 1
or more tester at same time.
e.g when user gives for tester 1 values 1 - 5, my vi creates list where values are displayd like this:
1
2
3
4
5
after that user gives for tester 2 values 5-1 and my vi creates list where values are displayd like this:
1
5
2
4
3
3
4
2
5
1
etc.
First I planned use insert into array function where for 1:st tester
row index would be 0,1,2,... and for 2:nd tester row index would be
1,3,5,... etc. One problem in this solution is that if tester 2 have
more values than tester 1, there will be left empty rows between
values. I planned use string replace to solve that problem, but then I
noticed antoher nasty feature of multicolumn listbox.
More serious problem with this structure is, that if tester 2 have more
values than tester 1, multicolumn listbox shows only same amount of
values than what tester 1 have and rest of values are lost in
kyberspace, because in multicolumn listbox values can be added only
places where already are values or to last row +1. Do anyone have any
ideas how to prevent this or how I should build my VI so I could create
test list for testers?

hi Janne.
it took me a while to get back
sorry!
good to know u have been able to solve it!
anyhow, do look this vi i have attached. This also takes care of extra elements in the larger array and appends them into the interleaved list box entry.
hope it can be of help to u.
ciao
Devchander
Attachments:
listbox_vi.vi ‏90 KB

How to write into multicolumn listbox during runtime?

Hi,
I am able to edit into multicolumn listbox. But i am not able to write into empty boxes... How to do that???
Regards,
Amit

Hi Amit,
Have you initialised the item names with any default values? If not try initialising the item names to a 2D size that will be large enough for you're requirements. Once this size is set in edit mode you can't enter data at runtime outside of this initialised area.
Ian

Is it possible to make a line of a multicolumn listbox active?

I currently have data entered into multicolumn listbox. While the program is running, is it possible for a row of the listbox to be selected and then give the index number of that row? From there I will want to use that index number to reference other arrays, but right now I'm just dealing with getting the index number I need from the user's row selection.

lmtis wrote:
The I32 is the default numeric constant, I didn't see the need to change it for this purpose.
You missed my point. The output datatype of the Value property node is an I32. You are wiring to an I32 indicator, but shoving it through a TypeCast function. This is pointless.
Message Edited by smercurio_fc on 06-20-2008 12:12 PM
Attachments:
Example_VI.png ‏4 KB

Multicolumn Listbox not more than 32 Symbols?

I have a Multicolumn Listbox. In the first row, I have a symbol (the diamond). Configuration of the Listbox is done via the frontpanel editor. Data is inserted programmatically, as well as the size, visibility and colors of the symbols are set programmatically. Basically, everything works fine. BUT when I insert more than 32 rows into the Listbox, there are no symbols on rows 32+.
I did not find any signs that the number of rows or number of symbols is set to 32 anywhere in the code or on the frontpanel editor.
What could be the reason for this strange behavior?

mibeer wrote:
So the strang behaviour could probably be reproduced by just adding programmatically a random number of entries to a multicolumn listbox upon click of a button.
Well, guessing does not really belong here.
If you suspect a LabVIEW bug, wire up a small example that demonstrates the problem and we can immediately eliminate the "probably" and get a definite answer instead. We like facts better!
Please do so! Thanks.
LabVIEW Champion . Do more with less code and in less time .

Disable horizontal scroll in multicolumn listbox

I'm using a Multicolumn listbox and I programmatically change the cell to be edited using UP, DOWN, RIGHT and LEFT keyboard keys.
Everything is working exept for the rightmost column: when I press the RIGHT key, the cursor moves to the next cell inside the rightmost column but all the table scrolls to the right (even if not really necessary) preventing the user from seeing the first column (leftmost). Is it possible in some way to lock or totally disable the horizontal scroll?
Every idea would be welcome.

I don't think there's a way to completely disable scrolling (once you ask the MCLB to show you a cell, it will probably do whatever it can to show it to you), but you can start by making the scrollbar invisible and by setting the Top Left Visible Cell property to [X, 0] every time you move a cell. If this doesn't work, you should upload your code. We play better when we have what to work with.
Try to take over the world!

Ever wonder how to create alternating row colors in multicolumn listbox?

Here's how

LabViewNubie (Matt) wrote:
Thanks for giving me something else to throw in my "bag of tricks". 90% of my current LabView knowledge is from your "LabVIEW For Everyone" book so I guess it's been upped to 91% now!
Matt,
I'm happy that you're finding the book useful. Jeffrey Travis (my co-auther) and Lisa Wells (co-author of 1st edition) deserve a whole lot of credit, too :-) And, regarding the multicolumn listbox trick, the amazing Michael Aivaliotis and Philippe Guerit are JKI's LabVIEW user interface wizards who deserves all the credit. Generally, I just ask for the user interface features ;-) Michael and Philippe are the ones who make it happen. Also, I just learned that they're working on another article about how to make your own cool looking buttons with glyphs. Stay tuned...
Thank you,

Filling large array into multicolumn listbox

Hi,
I need to fill a multicolumn listbox with a large array. I feed a 2D array into the ListNames property. The problem I am having is that if the array is large (+1000) it is taking forever to update the itemnames. Is this because the listbox is going through a resize? Is there someway to intialize the ItemNames array to speed up the insertion. It is also slow if the next array insertion (overwrite) is a small array.
thanks Michael

Hi Michael,
Please take a look at the attached VI.
This VI allows the user to programmatically (during run time) write data to a multicolumn listbox. The VI uses the control reference to a multicolumn listbox, so this VI will work on any multicolumn listbox. The VI has inputs for the 2D array (of strings), and a start location (row and column) where the zeroth (top left) element goes. The VI returns the end row and end column of the multicolumn listbox. This is useful for writing successive entries to the listbox.
In this vi, I am currently writing a 1000*10 2D array to a multicolumn listbox and it runs very fast.
Regards,
Ankita A.
Attachments:
programmatically_writting_a_2D_array_to_a_multicolumn_listbox.llb ‏104 KB

Adding a single line to a multicolumn listbox?

Hi Community,
I have a multicolumn listbox which tens of thousands of lines where each line is color coded and represent a cycle with a pass/fail status. The only way I have found to add lines to a multicolumn listbox is to read its ItemNames property which is a 2D array of strings, add the new line to the 2D array and then write then new array back to the ItemNames property.
The problem is that after couple thousands of lines this get more and more slow.
Is there any way to speed this process up, maybe by adding the line to the listbox in a different way?
thx.

The Listbox, and Multicolumn listbox controls got many UI performance improvements in 2013, what version are you using?
https://lavag.org/topic/17009-labview-2013-favorite-features-and-improvements/
But even if you are on an old version there are many tricks to making the UI more responsive, like using defer panel updates, and virtual multicolumn listboxes.
https://lavag.org/topic/15289-virtual-multicolumn-listbox/
Unofficial Forum Rules and Guidelines - Hooovahh - LabVIEW Overlord
If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.

How can I automatically word wrap a string placed in a (multicolumn) listbox ?

Hello,
Using LabView 7.0:
I need to automatically wrap text inserted in a multicolumn listbox.
The size of the listbox is fixed and I don't know the legth of the string that will be inserted. But the whole string must be visible, because it's Information is important
I'm not allowed to use a fixed width font. :-(
Has anyone any ideas (or a solution already?)
How can I compute the length of a string in pixel to calculate to position to wrap?
Thanks in advance,
best regards,
Rainer

Hi Veena,
The trick is to use the Get Text Rect.vi to calculate where to wrap your text string. There's no feature to automatically wrap the string for you, so you will have to split you string into sections/lines, that doesn't exceed the width of the column in the listbox.
Good luck!
- Philip Courtois, Thinkbot Solutions

Editing entries in multicolumn listbox

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