LooperSort (Function)

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Looper linked to a data source and using a programmed browse

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LooperSort (Function)

In french: ZoneRépétéeTrie

Allows you to:

Sort a Looper control according to one or more attributes.
Sort a Looper control on all its attributes.
Cancel a sort that was performed beforehand (which means ignore the sort).

Versions 16 and later

This function is now available for WINDEV applications in Linux.

This function is now available for Windows Phone applications.

New in version 16

This function is now available for WINDEV applications in Linux.

This function is now available for Windows Phone applications.

This function is now available for WINDEV applications in Linux.

This function is now available for Windows Phone applications.

Versions 18 and later

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Example

// Sort according to one of the Looper control attributes selected in a Radio Button control
SWITCH RADIO_RADIO1
CASE 1: LooperSort("NAME")
CASE 2: LooperSort("COMPANY")
CASE 3: LooperSort("CITY")
END

// Sort by name (in ascending order) and by date (in descending order)
LooperSort("NAME" + TAB + "-DATE")

// Sort the LOOP_Customer Looper control on all its attributes (in descending order)
LooperSort("-LOOP_Customer")

// Cancels the sort that was performed in the LOOP_Customer Looper control
LooperSort("LOOP_Customer", False)

Syntax

Sorting a Looper control according to a list of attributes Hide the details

<Result> = LooperSort(<List of attributes>)

<Result>: Boolean

True if the sort was performed,
False otherwise.

<List of attributes>: Character string (with quotes)

Name of the attributes according to which the Looper control will be sorted (up to 10 attributes). This character string must have the following format:

[<Direction>]<Attribute 1> + TAB + [<Direction>]<Attribute 2> + TAB + ...

where:
<Direction>: sort direction (optional), can take the following values:
"+": the sort will be performed in ascending order (default value).
"-": the sort will be performed in descending order.
<Attribute>: name of the attribute used for the sort.

Sorting a Looper control or canceling a previous sort Hide the details

<Result> = LooperSort([<Direction>]<Looper> [, <Indicator>])

<Result>: Boolean

True if the sort was performed or canceled,
False otherwise.

<[<Direction>]<Looper>>: Character string (with quotes)

Name of the Looper control to sort.
If <Direction> is equal to "+", the Looper control will be sorted in ascending order (by default).
If <Direction> is equal to "-", the Looper control will be sorted in descending order.

<Indicator>: Optional boolean

True to perform the sort (default value),
False to cancel a sort that was performed beforehand.

Remarks

Use conditions

LooperSort can be used on a browsing or memory Looper control.

Canceling the sort

The sort is not canceled by LooperDelete, LooperDeleteAll, LooperSeek and LooperCount.
If an attribute is modified by LooperModify and if this attribute is used as sort attribute for the Looper control, the sort on this attribute is canceled.

Sort

The sort will be taken into account during the next addition of a row into the Looper control (LooperAdd, LooperAddLine, LooperInsert and LooperInsertLine).

Looper linked to a data source and using a programmed browse

LooperSort does not operate on a Looper control with the following characteristics:

Looper control linked to a data source,
Looper control that uses Programmed browse ("Content" tab in the control description window).

To change the display order of a Looper control with programmed browse, you must adapt the code found in the different read processes of the Looper control (process for reading the first one, the next one, the previous one, ...).

Component : wd250obj.dll