ui.Dialog.setArrayLength

Syntax

setArrayLength(
   name STRING,
   length INTEGER )

1. name is the name of the screen record, see Identifying screen-arrays in ui.Dialog methods.
2. length is the new size of the array.

Usage

The setArrayLength() method is used to specify the total number of rows when using the DISPLAY ARRAY paged mode. The name of the screen array is passed to identify the list, followed by an integer expression defining the number of rows.

When using a regular dynamic array without paged mode (without the ON FILL BUFFER clause), you don't need to specify the total number of rows to the DIALOG instruction. It is defined by the number of elements in the array. However, when using the paged mode in a DISPLAY ARRAY, the total number of rows does not correspond to the elements in the program array, because the program array holds only a page of the whole list. In any other case, a call to this method is just ignored.

A call to setArrayLength() will not trigger the execution of the ON FILL BUFFER clause immediately: This trigger will be executed when the control goes back to the dialog instruction, after all user code following setArrayLength() has been executed.

In a paged mode DISPLAY ARRAY using COUNT=-1, before calling setCurrentRow(screen-array, row-index), be sure to provide the actual number of rows with ui.Dialog.setArrayLength( screen-array, count ) where count > row-index. Otherwise, the setCurrentRow() call will have no effect, if the dialog has not yet seen row-index rows through ON FILL BUFFER.