gLink (Function)

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Where to use gLink
Added value
Case sensitivity
Auto-filled combo boxes
Retrieved element
Scheduler control
Special case: Combo Box control or Combo Box in a Table control

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gLink (Function)

In french: gLien

Warning
From version 27, this function is kept for backward compatibility. It is recommended to use gStoredValue.

Adds an "invisible" value to an element in a List Box, Combo Box or Scheduler control. This value will be the stored value when the control element is selected by the user.

Remarks:

To get the stored value associated with an element of the control, use the StoredValue property.
To retrieve the value defined by gLink:
- use the gLinkActivate function.
- check "Return value specified with gStoredValue" ("Details" tab of the control description).
In this case, the control will directly return the value of gLink that corresponds to the selected option.

Versions 15 and later

This function is now available for Android applications.

New in version 15

This function is now available for Android applications.

Versions 16 and later

This function is now available for PHP sites.

This function is now available for WINDEV applications in Linux.

New in version 16

This function is now available for PHP sites.

This function is now available for WINDEV applications in Linux.

This function is now available for PHP sites.

This function is now available for WINDEV applications in Linux.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android widget mode.

New in version 18

This function is now available in Android widget 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

// Button control code to populate the Combo Box control
// ----------------------------------------------
// The "COMBO_Title" Combo Box displays personal titles:
// "Mister", "Madam" and "Miss".
// An integer representing a gender will be returned to the language.
ListAdd(COMBO_Title, "Mister" + gLink("1"))
// Only the string "1" is returned to the language.
// This string is not displayed in the Combo Box control.

// Code of the Button control used to get the value of gLink
// -----------------------------------------------------------
// Code used to get the value of gLink for the selected option
Info(COMBO_Title[COMBO_Title].StoredValue)
// Displays "1" in our example.

Syntax

<Result> = gLink(<String to return>)

<Result>: Character string

Control string that must be used in ListAdd, ListInsert or ListModify.

<String to return>: Character string

Text value to return. Only this string will be returned to the language. This string will not be displayed in the row.

Remarks

Where to use gLink

gLink can be called anywhere in the row to be added.

For example:

ListAdd(COMBO_COMBO1, gLink("1") + "Mister")
// or
ListAdd(COMBO_COMBO1, "Mister" + gLink("1"))

Added value

Values added with gLink are not taken into account for sort operations and keyboard shortcuts.

If multiple values are added to an element of a list box with gLink, only the first value will be returned.

ListAdd(LIST_LIST1, "MyElement" + gLink("Link1") + gLink("Link2"))

In this example, only the "Link1" value will be returned.

ListSeek takes into account the values added by gLink.

Case sensitivity

gLink is case-insensitive.

Therefore, the following code:

ListAdd(LIST_LIST1, "MyElement" + gLink("AAA"))

will be equivalent to:

ListAdd(LIST_LIST1, "MyElement" + gLink("aaa"))

Auto-filled combo boxes

gLink is used to manage "Auto-filled Combo Box" controls.

Retrieved element

When an element is retrieved from a List Box or Combo Box control, the priority order is as follows:

Values added by gLink.
Values added by gToRetrieve.

To get the stored value associated with an element of the control, use the StoredValue property.

Scheduler control

If the resources in the schedule have been created with SchedulerAddResource using gLink, the name of the resource obtained with the SelectedResource property will correspond to the value specified in the gLink function for this resource.

Example:

// Adds a resource (a meeting room) into the Scheduler control
// Meeting is the data file that describes the available meeting rooms
SchedulerAddResource(SCH_RoomOccupancy, Meeting.Name + gLink(Meeting.MeetingID))

...

// Click code on BTN_NEW_APT button
MyAPT is Appointment
IF SCH_RoomOccupancy.SelectedResource = "" THEN
RETURN
END

MyAPT.StartDate = SCH_RoomOccupancy.StartDate
MyAPT.EndDate = SCH_RoomOccupancy.EndDate
MyAPT.Resource = SCH_RoomOccupancy.SelectedResource
// The name of the resource corresponds to the value specified
// in gLink for this resource

Special case: Combo Box control or Combo Box in a Table control

If gLink must return an empty string (""), the result will be different if the control used is a Combo Box control or a Combo Box column in a Table control.

The following code is used:

ListAdd(COMBO, "MyElement" + gLink(""))

the value retrieved will be:

an empty string ("") in the case of a Combo Box control,
0 (zero) in the case of a Combo Box column in a Table control.

To use the same code to retrieve the value of gLink for a Combo Box control and a Combo Box column, it is recommended to use a Combo Box control in a container column in the Table control.

Component: wd270obj.dll