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  • List Boxes containing more than 10 000 elements
  • Visibility/Invisibility of elements in a List Box or Combo Box control
  • Equivalence
  • Sorted/Unsorted List Box control
  • Adding an element onto the browser
  • Miscellaneous
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Stored procedures
Adds an element into:
  • a memory List Box control,
  • a memory Combo Box control.
Remarks:
  • To add an element at a specific position, use <List Box>.Insert.
  • <List Box>.Add can be used on the single-selection and multiselection List Box controls.
  • To add an image into a standard List Box control, use gImage.
  • To add elements into a Combo Box control found in a container column of a Table control, use ..Content.
WEBDEV - Browser code Caution: The element will only be added to the page displayed in the browser. See the Notes for more details.
Versions 16 and later
Linux This function is now available for WINDEV applications in Linux.
New in version 16
Linux This function is now available for WINDEV applications in Linux.
Linux This function is now available for WINDEV applications in Linux.
Example
// Add the customer named "Moore" into "LIST_CustomerList"
LIST_CustomerList.Add("Moore")
WEBDEV - Server codeWEBDEV - Browser codeAjax
// Add the customers named "Clark" and "Smith" into "LIST_CustomerList"
LIST_CustomerList.Add("Clark" + CR + "Smith")
WEBDEV - Server codeWEBDEV - Browser codeAjax
// The "COMBO_Title" Combo Box displays the genders:
// "Mister", "Madam" and "Miss".
// An integer representing a gender will be returned to the language.
COMBO_Gender.Add("Mister" + gLink("1"))
Syntax
<Control to use>.Add([<Element>])
<Control to use>: Control name
Name of control to use.
<Element>: Optional character string (with quotes)
Element that will be added into the specified control. If this parameter is not specified, an empty row is added into the List Box or Combo Box control.
This parameter can contain:
  • Carriage Return characters (CR) to add several elements.
  • tabs (TAB) to obtain a multi-element List Box control (see Notes).
  • gLink to indicate the value that will be returned when the element is selected.
WEBDEV - Server codeWEBDEV - Browser codePHP The Carriage Return characters (CR) are supported while the tabulations (TAB) are not supported.
WEBDEV - Server code To add several consecutive spaces, non-breakable space characters must be used: Charact(160).
Remarks

List Boxes containing more than 10 000 elements

The maximum number of elements found in a List Box control is limited by the available memory (theoretical maximum: 2 billion rows). Nevertheless, filling a List Box control with an important number of elements (more than 10 000) affects the performances
To add an important number of elements into a List Box control, we recommend that you use a browsing List Box control (which means a list directly linked to a HFSQL data file).
WEBDEV - Server codeAjax

Visibility/Invisibility of elements in a List Box or Combo Box control

To make an element invisible in a List Box or Combo Box control, use gLink.
WEBDEV - Server codeWEBDEV - Browser codeAjax

Equivalence

The two following syntaxes are equivalent:
<Control name>.Add([<Element>])
and
<List name>[Subscript] = <Element>
WEBDEV - Server codeWEBDEV - Browser codeAjax

Sorted/Unsorted List Box control

  • If the List Box control is sorted, the new element is inserted according to the sort order.
  • If the List Box control is not sorted, the new element is added at the end of the list.
The control type (sorted or not) is chosen during the control description ("Details" tab).

We recommend that you use <List Box>.Add rather than <List Box>.Insert to add an element into a sorted List Box control.
WEBDEV - Browser code The element is added at the end of control, no matter whether the List Box control is sorted or not.
WEBDEV - Browser code

Adding an element onto the browser

When adding an element in browser code, this element is added to the page displayed in the browser only. In order for this element to be added onto the server, <List Box>.Add must be run on the server.
The use of the function <List Box>.Add in browser code is interesting when using the AJAX technology in "Programmed AJAX" mode (use of the function AJAXExecute or AJAXExecuteAsynchronous).
Reminder: In "Automatic and immediate AJAX" mode, all you have to do is switch the server process containing <List Box>.Add to automatic AJAX mode. That's it! No additional programming is required. See AJAX for more details.

Miscellaneous

  • To add elements into a Table control, use <Table>.Add.
  • <List Box>.Add can be used on:
    • a column of type"Combo Box" in a Table control.
    • A "Table" Combo Box control.
Component : wd250obj.dll
Minimum version required
  • Version 23
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