Tech Tip: Special object attributes are case sensitive

PRODUCT: 4D | VERSION: 17 | PLATFORM: Mac & Win

Published On: May 30, 2019

When working with special object attributes like This.value (collection-based listboxes) and Collection.parameters (collection for query placeholders), always make sure the attribute name is entirely lowercase otherwise changing its case would yield incorrect results.

Example 1: This.Value (Incorrect)

Example 2: This.value (Correct)

Example 3: $Param.Parameters (Incorrect)

C_OBJECT($Params;$Selection)
$Params:=New object
$Params.Parameters:=New collection("Erick") // Incorrect
$Selection:=ds.Client.query("name = :1";$Params)

Example 4: $Param.parameters (Correct)

C_OBJECT($Params;$Selection)
$Params:=New object
$Params.parameters:=New collection("Erick") // Correct
$Selection:=ds.Client.query("name = :1";$Params)