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This code works in array and rdd but not on tree

on array:

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oBrw:bClrStd := {|| {CLR_BLACK, IF( oBrw:nArrayAt % 2 == 0, nRGB( 235, 235, 235 ), nRGB(251,253,255) ) }}
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on rdd:

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oBrw:bClrStd := {|| {CLR_BLACK, IF( (cAlias)->( RecNo() ) % 2 == 0, nRGB( 235, 235, 235 ), nRGB(251,253,255) ) }}
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on tree: PROBLEM

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oBrw:bClrStd := {|| {CLR_BLACK, IF( oBrw:oTreeItem:ItemNo() % 2 == 0, nRGB( 235, 235, 235 ), nRGB(251,253,255) ) }}
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Maybe I got it wrong.. Any Idea?

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aClrCol:={ { 0, nRGB(192,221,255) }, { 0, nRGB(221,245,255) } }

// Changing Alternative Row-Colors
oBrwGroups:bClrStd := { || aClrCol[ oBrwGroups:KeyNo % 2 + 1 ] }  

Regards
Anser

As Mr Anser suggested, the expression oBrw:KeyNo % 2 works for all browses, whether array, dbf, recordset, etc.
It is desirable to adopt this generic approach.

Thanks Mr. RAO, Mr. Anser..

It works like a charm..