- List Box controls containing more than 10 000 elements
- Visibility/Invisibility of elements in a List Box or Combo Box control
- Customizing the elements found in a List Box or Combo Box control
- Sorted/Unsorted List Box control
- Tabulations: Multi-selection List Box control
- Adding an element onto the browser
In french: ListeInsère
Inserts an element into a memory List Box control, a memory ListView control or a memory Combo Box control.
- To add an element at the end of List Box (or Combo Box) control, use ListAdd.
- ListInsert 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.
: The element will only be added to the page displayed in the browser. For more details, see Remarks.
This function is now available for WINDEV applications in Linux.
// Add "Clark" in 4th position to "LIST_CustomerList"
ListInsert(LIST_CustomerList, "Clark", 4)
<Result> = ListInsert(<List Box control> , <Element> [, <Image> [, <Element index>]])
- True if the element was inserted,
- False otherwise.
returns no result.
<List Box control>: Control name
Name of memory List Box or memory Combo Box control to use.
If this parameter corresponds to an empty string (""), the element is inserted in the List Box or Combo Box control to which the current process belongs.
The name of List Box or Combo Box control to use must necessarily be specified.
<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).
For a ListView control,
this parameter corresponds to the image caption. This parameter can contain Carriage Return characters (CR) to add several elements. In this case:
- if <Image> and <Element index> are not specified, the added elements will be associated with the default image (defined in the "Details" tab of the control description window).
- if <Image> and <Element index> are specified, only the first element will be added. This element will be associated with the default image (defined in the "Details" tab of the description window of control).
- if <Image> is specified and if <Element index> is not specified, only the first element will be added. This element will be associated with the specified image.
To add several consecutive spaces, non-breakable space characters must be used: Charact(160).
<Image>: Optional character string
Name and path of image that will be added into a ListView control. This parameter is taken into account for ListView controls displayed in ListView mode only. If this parameter is not specified, the default image (defined in the "Details" tab in the description window of control) will be used.
<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 ListCount.
- is equal to 0, the element is added at the beginning of memory List Box (or Combo Box) control.
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).
Tabulations: Multi-selection List Box control
To manage the tabulations in a List Box control (alignment of columns), use the TAB constant. For example:
ListInsert(LIST_Customer, LastName + TAB + FirstName)
In this example, all the first names start at the same position and are aligned one under the other.
: The first call to ListInsert
defines the position of tabulations. These positions will be taken as reference for all values added thereafter. Similarly, if values have been typed entered in the editor, the positions of these values are taken as reference. During the first call to ListInsert
, we advise you to define the width of columns with Complete
. For example, to fix the width of columns found in "LIST_Customer" to 10 characters:
ListInsert(LIST_Customer, Complete(LastName, 10) + TAB + Complete(FirstName, 10))
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, ListInsert must be run on the server.
: In "Automatic and immediate AJAX" mode, all you have to do is switch the server process containing ListInsert
to automatic AJAX mode. That's it! No additional programming is required. For more details, see AJAX
- To insert an element into a Table control, use TableInsert.
- ListInsert can be used on a "Combo Box" column in a Table control .
This page is also available for…
ListInsert(LSV_Listview, "Imagen 1","D:\_GRAVACOES\Amarildo\Blog_Mandar_imagem\2016-10-04_1348.png", 1)
ListInsert(LSV_Listview, "Imagen 2","D:\_GRAVACOES\Amarildo\07112016_segunda\001\Video_Falta_1000.png", 2)
//Blog com Video E Exemplo