dbchart 线条颜色的问题

Question

请问在dbchart中画线时,怎样实现大于零的数值以蓝色线条表示,小于零的数值以红色线条表示?

Answer 1

with   adoquery_sum do
              begin
               dbchart.Series[0].Clear;
               while   not   adoquery_sum.eof     do
                  begin
                  if  adoquery_sum.FieldValues['BudgetVariance']>0  then
                  begin
                  dbchart.Series[0].Add( adoquery_sum.FieldValues['budgetvariance'],adoquery_sum.FieldValues['date'],clblue) ;
                  end
                  else
                   dbchart.Series[0].Add( adoquery_sum.FieldValues['budgetvariance'],adoquery_sum.FieldValues['date'],clred);
                   adoquery_sum.next;
                   end;
              end; 
这样写好像也没有用啊 ??