PC SOFT

ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Home | Sign in | English EN
  • 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
  • Miscellaneous
WINDEV
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystUniversal Windows 10 App
Others
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.
Example
// Add "Clark" in 4th position to "LIST_CustomerList"
LIST_CustomerList.Insert("Clark", 4)
Reports and Queries
// Add the "C:\MyImages\CoralReef.JPG" image in 5th position to "LSV_Diving"
// The caption of this image will be "Nice coral"
LSV_Diving.Insert("Coral Reef", "C:\MyImages\CoralReef.JPG", 4)
Syntax
<Result> = <List Box control>.Insert(<Element> [, <Image> [, <Element index>]])
<Result>: Boolean
  • True if the element was inserted,
  • False otherwise.
<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).
<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 <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).
Reports and Queries

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.
Reports and Queries

Customizing the elements found in a List Box or Combo Box control

To customize the elements found in a List Box or Combo Box control (background color, image, drawing, ...), use the Graphic strings management functions.
Reports and Queries

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.
Reports and Queries

Tabulations: Multi-selection List Box control

To manage the tabulations in a List Box control (alignment of columns), use the TAB constant. For example:
LIST_Customer.Insert(LastName + TAB + FirstName)
In this example, all the first names start at the same position and are aligned one under the other.
Remark: The first call to <List Box>.Insert 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 <List Box>.Insert, 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:
LIST_Customer.Insert(Complete(LastName, 10) + TAB + Complete(FirstName, 10))

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
This page is also available for…
Comments
Click [Add] to post a comment