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  • List Box controls containing more than 10 000 elements
  • Visibility/Invisibility of elements in a List Box or Combo Box control
  • Sorted/Unsorted List Box control
  • Adding an element onto the browser
  • Miscellaneous
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Stored procedures
Inserts an element into a memory List Box control, a memory ListView control or a memory Combo Box control.
Remarks:
  • To add an element at the end of List Box (or Combo Box) control, use <List Box>.Add.
  • <List Box>.Insert can be used on single-selection and multi-selection List Box controls
  • To manage the contents of a Combo Box control in a container table column, use the Content property.
WEBDEV - Browser code Caution: The element will only be added to the page displayed in the browser. For more details, see Remarks.
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 "Clark" in 4th position to "LIST_CustomerList"
LIST_CustomerList.Insert("Clark", 4)
Syntax
<List Box control>.Insert(<Element> [, <Element index>])
<List Box control>: Control name
Name of memory List Box or memory Combo Box control to use.
<Element>: Character string
Element that must be inserted into the specified memory List Box (or Combo Box) control.
This parameter can contain:
  • Carriage Return characters (CR) to add several rows. In this case:
    • if <Element index> is not specified, the elements are added.
    • If <Element index> is specified, only the first element will be added.
  • tabs (TAB) to obtain a multi-element List Box control (see Notes).
WEBDEV - Server codeWEBDEV - Browser codePHP The Carriage Return characters (CR) and the tabulations (TAB) are not supported.
WEBDEV - Server code To add several consecutive spaces, non-breakable space characters must be used: Charact(160).
<Element index>: Optional integer
Index of the element to be inserted.
If this parameter:
  • is not specified, the element is inserted:
    • before the current element in a single-selection List Box control. If there is no current element, the element is inserted at the end of the memory List Box (or Combo Box) control.
    • at the end of the List Box (or Combo Box) control in a multi-selection List Box control.
  • is greater than the number of elements found in the List Box (or Combo Box) control, the element is inserted at the end of the memory List Box (or Combo Box) control. The number of elements found in a List Box (or Combo Box) control is returned by <List Box>.Count.
  • is equal to 0, the element is added at the beginning of memory List Box (or Combo Box) control.
Remarks

List Box controls 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 performance.
To add a large number of elements to a List Box control, we recommend you use a browsing List Box control (that is a List Box control directly linked to an HFSQL data file).
WEBDEV - Server codePHPAjax

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 gStoredValue.
WEBDEV - Server codeWEBDEV - Browser codeAjax

Sorted/Unsorted List Box control

  • If the List Box control is sorted, the new element is inserted at the current position without sorting the list box.
  • If the List Box control is not sorted, the new element is added:
    • at <Element index> if <Element index> is specified.
    • before the current element in a single-selection List Box control if the <Element index> parameter is not specified. If there is no current element, the element is inserted at the end of the memory List Box (or Combo Box) control.
    • at the end of the List Box (or Combo Box) control in a multi-selection List Box control if the <Element index> parameter is not specified.
The type of the List Box control (sorted or not) is selected during the control description ("Details" tab).
Use <List Box>.Add rather than <List Box>.Insert to add an element to 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>.Insert must be run on the server.
Calling <List Box>.Insert 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 <List Box>.Insert to automatic AJAX mode. That's it! No additional programming is required. For more details, see AJAX.

Miscellaneous

  • To insert an element into a Table control, use TableInsert.
  • <List Box>.Insert can be used on a "Combo Box" column in a Table control .
Component: wd270obj.dll
Minimum version required
  • Version 23
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