Form Data displaying Asending Or Descending through code

// Changed on 26 Jul 2016 at 05:09:16 by jredd
public void init()
{
    super();
         this.query().dataSourceNo(1).addSortField(fieldnum(Kr_eDoc_CheckRegister,kr_ChequeNumber),SortOrder::Descending);

// this.query().dataSourceNo(1).addSortField(fieldnum(TableName, Fieldname),SortOrder::Descending);
}