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Navigation:  ABC Library Reference > ASCIIFileClass > AsciiFileClass Methods >====== ValidateLine (a virtual to implement a filter) C6H0009.jpg ====== Previous pageReturn to chapter overviewNext page

ValidateLine( line ), PROTECTED, VIRTUAL

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ValidateLine A virtual placeholder method to implement a filter.
line The offset or position of the line of text to evaluate.

The ValidateLine method is a virtual placeholder method to implement a filter. ValidateLine returns one (1) to include the line and zero (0) to exclude the line.

Implementation:

The ValidateLine method is a placeholder method for derived classes. The ASCIIFileClass calls the ValidateLine method when it initially reads a record.

Return Data Type:     BYTE

Example:

MyFileClass.ValidateLine FUNCTION(STRING LineToTest)

CODE

IF LineToTest[1] = '!'           !check for ! in column 1

 RETURN False                    !exclude lines with !

ELSE

 RETURN True                     !include all other lines

END

validateline_a_virtual_to_implement_a_filter_.htm.txt · Last modified: 2021/04/15 15:57 (external edit)