How to validate that a combobox item was selected

How to validate that a combobox item was selected

Posted by: klgrube on 7 January 2018, 4:32 pm EST

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  klgrube

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  Posted 7 January 2018, 4:32 pm EST

  For three comboboxes on an ASP.Net sheet, I have set the first value to 0 with the text of “* Please make a selection …” There is no default value in the database intentionally but there is a constraint that says > 0, so I know the database won’t be updated. It’s just that I don’t know the best way of letting the user know what happened.

  I need to make sure the three values are greater than 0 when a user hits the Update command button.

  I’m not sure what the code should look like for checking whether or not a user has actually changed a drop-down value before updating the database and that it meets certain criteria. They have to choose something from the drop-down list. I don’t know how to validate that.

  Any guidance would be appreciated.

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  deepak.sharma

  

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  Posted 8 January 2018, 1:30 am EST

  Hello,

  You would need to create a custom combobox celltype and set the attribute for onChange in GetEditorControl method.
  
  Please refer to the attached sample application.

  Thanks,
  
  Deepak SharmaSpreadWebItemChangedCombo.zip