Help / WLanguage / WLanguage functions / Controls, pages and windows / Looper functions
  • Use conditions
  • Sort
  • Handling a binary memo
  • Modifying a Looper control without attributes
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Stored procedures
Changes the values of the attributes in a row of a Looper control.
Remark: It is recommended to use <Looper>.ModifyLine. Indeed, <Looper>.ModifyLine allows you to insert:
  • TAB characters into the attributes/controls.
  • all types of values into the attributes/controls.
Universal Windows 10 AppAndroidiPhone/iPad For Looper controls without attributes, it is recommended to directly change the value of the relevant controls. For more details, see "Modifying a Looper control without attributes.
// Modify a row in a Looper control
LOOP_Looper1.Modify(ProductName + TAB + ProductCode, Index)
// Modifies a value in the Looper control at position 12
LOOP_Looper1.Modify(LastName + TAB + FirstName + TAB + ...
PhoneNum + TAB + FaxNum, 12)
<Looper control>.Modify(<Value> [, <Index>])
<Looper control>: Control name
Name of the Looper control to be used.
<Value>: Character string
List of modified values. This parameter must have the following format:
<Value 1> + TAB + ... + <Value N>

The different values must be specified in the order of the attributes (Looper control description window).
To specify no value for an attribute, use an empty string ("") or 0 (depending on the type of the attribute).
<Index>: Optional integer
Index of the row to be modified.
  • If this parameter is not specified, the modification will be performed on the current element.
  • If <Index> is greater than the number of rows, <Looper>.Modify is equivalent to <Looper>.Add.

Use conditions

<Looper>.Modify can be used on:
  • a Looper control based on a data file,
  • a Looper control populated programmatically.


If <Looper>.Modify modifies a sort attribute of the current Looper control, the sort order set with this attribute will be removed.

Handling a binary memo

To modify a binary memo in a Looper control, use <Looper>.ModifyLine.
Universal Windows 10 AppAndroidiPhone/iPad

Modifying a Looper control without attributes

To modify a Looper control without attributes, it is recommended to directly change the value of the relevant controls.
For example:
// Modify the value of controls
// in "LOOP_Looper1" for row 23
LOOP_Looper1[23].LastNameControl = "Hobbes"
LOOP_Looper1[23].FirstNameControl = "Samantha"
Component: wd290obj.dll
Minimum version required
  • Version 23
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Last update: 06/22/2023

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