【问题】

I have grouped the data on the column “state” and set the pagebreak option to “Always Excluding First” so that I can see the data related to a particular state in a separate page.

I’m trying to add a horizontal line after every 5 rows in the group. How can I do that??

I tried to add a line and set the visibility property to “Hide Element”, selected the radio button “For specific output” and wrote the expression "Birt.Math((row._rownum+1),5)!=0". At first, it looked like a solution, but for the next group, the rownum is not “zero”.

http://www.birt-exchange.org/org/forum/public/style_emoticons/ default/confused.gif How can I reset the “rownum” to zero for every first row in the group so that I can see the horizontal line after every 5 rows(starting from the first row in that group, but not the first row in the table) in the next groups?

To say it more clear, if I have 2 groups and in the first group(which is in the first page) I have 17 rows. In the second group (which is in the second page), I have 18 rows. When I tried to add the expression for the visibility(mentioned above), I could see the horizontal line for every 5 rows in the first page. But in the next page, I can see the horizontal line after 3 rows(and not after 5 rows). This is because of the rows 16,17 in the first group and the rows 18,19,20 in the second group. I want to reset the rownum to zero for the first row of every group.

cities 表：

stateid cid Name
42 52 Memphis
42 56 Nashville
43 49 Arlington
43 54 El Paso
43 4 Houston
43 8 Dallas
43 9 San Antonio
43 15 Austin
43 20 Paso
43 24 Fort Worth
43 72 Corpus Christi
43 78 Plano
43 94 Garland

【回答】

使用报表脚本重置组内序号有点麻烦，这类问题可以通用地在数据源准备阶段用集算器 SPL 加计算列的方式解决：

方法一：在组内每隔 5 行设一个标签

	A
1	$select stateid,cid,Name,0 as rowmark from cities
2	>A1.group(stateid).run(~.step(5,5).run(rowmark=1))

结果如下：

方法二：添加组内序号

	A
1	$select stateid,cid,Name,0 as rownum from cities
2	>A1.group(stateid).run(~.run(rownum=#))

结果如下：

BIRT 可通过 JDBC 访问集算器，可以像数据库一样使用，参考Java 如何调用 SPL 脚本。