Programmatically Update Combobox Getting Duplicates in LabVIEW

[kadilakd73]

New to LabView and am using 2017 version.  I have a combobox that is already populated with items and a user will be able to add to the combobox items by entering a new string value and pressing a button.  The button is in an event structure which is inside a while loop.  The problem is when the new string value is updated in the combobox there are two.  Is there anything that can be done to prevent the duplicate?

Thanks

[crossrulz]

Before adding the new value, use Search 1D Array to see if the new value is in the Strings[] array first.  If it is not, then you can add the new value.

[kadilakd73]

Thank you for the reply and the tip.  I will add the Search 1D Array to prevent any duplicate values.

The problem I am having is when the pusbutton is pressed to add the new string it adds two of the new string instead of only one.  I'm not sure if it's a timing issue or if the array will need to be evaluated after the new string is added to delete any duplicates.

[paul_cardinale · Accepted solution]

You're using references unnecessarily.  Use property nodes that are linked to the control.

Also, the terminal for the stop button needs to be in it's own Value Change event.

[OEM_Dev]

Change the boolean action from "switch until released" to "latch when released"

[kadilakd73]

Works great.  Thanks for your help.

[aputman]

It can also be done without the button.  Combo boxes allow undefined values at runtime.  Setup a Value Change on the combo box, check for duplicates and add the new value to the Strings array. 

[kadilakd73]

This was in response to paul_cardinale.

First time on the forum.

[aputman]

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@kadilakd73 wrote:

This was in response to paul_cardinale.

First time on the forum.

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Use the quote button to make reference to a specific message.

[kadilakd73]

Thanks.

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@aputman wrote:

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@kadilakd73 wrote:

This was in response to paul_cardinale.

First time on the forum.

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Use the quote button to make reference to a specific message.

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