printWhenGroupChanges

[2005 IR Help]

By: kler44 - kler44

printWhenGroupChanges

2004-10-28 02:42

I need to print a value only once, when the group changes. This is my code :

 

<textField isBlankWhenNull="true" evaluationTime="Group" evaluationGroup="ThemeGroup">

<reportElement x="190" y="1" width="60" height="22" printWhenGroupChanges="ThemeGroup" isPrintRepeatedValues="false"/>

<textElement textAlignment="Left" verticalAlignment="Middle"/>

<textFieldExpression class="java.lang.Integer">$V{nbThemes} </textFieldExpression>

</textField>

 

The problem is that the value is always repeated. Can you tell me what is the problem and how I can resolve it ?

Thank you.

 

 

 

 

By: Tobias Gaekle - ike987

RE: printWhenGroupChanges

2004-10-29 01:56

there is no condition whether the value should be printed or not, so it always prints.

 

you could define a variable like this:

<variable name="showOnce" class="java.lang.Integer">

<variableExpression><![CDATA[

$V{ThemeGroup_COUNT}.intValue() == 1

? $V{nbThemes}

: null

]]></variableExpression>

</variable>

 

the groupname_COUNT holds the number of already processed records for that group. if it holds 1, return nbThemes, else return null.

 

hth