Alternate colors of odd and even rows

You can alternate the background color of the rows in a table or list. For example, you could use a grey background for odd-numbered rows and a white background for even-numbered rows.

1. In the BDL for your report, specify a variable that increments by 1 for each new row.

   For example:

    ...
   
    DEFINE row_id INTEGER
    LET row_id = 0
    ...
   
       START REPORT myReport 
       FOREACH c_order INTO orderline.*
           OUTPUT TO REPORT myReport(orderline.*, row_id)
           LET row_id=row_id+1
           ...
       END FOREACH
       FINISH REPORT myReport
    
     ...
   

2. Generate the data schema (see Generate a data schema from a Genero BDL report program).
   The new data field (for example, row_id) displays in your Data View.
3. Open the Report Design Document. In the Table or List, select the row, and edit the Background Color property to specify the color of the alternating rows.

   For example, to set odd-numbered rows to grey and even-numbered rows to the default color:

   row_id%2==0?Color.LIGHT_GRAY:null

The Table or List displays similar to Figure 1.