Help / WLanguage / WLanguage functions / Controls, pages and windows / List Box functions
  • Deletion on the browser
  • Miscellaneous
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Stored procedures
Clears a List Box, ListView or Combo Box control populated programmatically.
Remark: ListDeleteAll can be used on the single-selection and multi-selection List Box controls.
WEBDEV - Browser code Caution: The List Box (or Combo Box) control will be cleared on the page displayed in the browser only. For more details, see Remarks.
// Delete all elements from the "LIST_CustomerList" control
ListDeleteAll(<List Box control>)
<List Box control>: Control name
Name of List Box (or Combo Box) control to use. If this parameter corresponds to an empty string (""), all the elements of the List Box control (or Combo Box) to which the current event belongs are deleted.
WEBDEV - Browser code The name of the List Box (or Combo Box) control to use must be specified.
WEBDEV - Browser code

Deletion on the browser

When deleting elements from a List Box (or Combo Box) control in browser code, these elements are deleted on the page displayed in the browser only. In order for these elements to be deleted from the server, ListDeleteAll must be run on the server.
Calling ListDeleteAll in browser code is useful when using AJAX technology, in "Programmed AJAX" mode (via AJAXExecute or AJAXExecuteAsynchronous).
Reminder: In "Automatic and immediate AJAX" mode, all you have to do is switch the server process containing ListDeleteAll to automatic AJAX mode. That's it! No additional programming is required. For more details, see AJAX.


  • To delete all the rows from a Table control, use TableDeleteAll.
  • ListDeleteAll can be used on a "Combo Box" table column.
  • For the editable Combo Box controls, the input area is cleared.
Component: wd290obj.dll
Minimum version required
  • Version 9
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Last update: 06/07/2022

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