How to evaluate variable when there is no data?

[quacker.2715]

My report is using a parameter to determine the report title. It is displaying null when there is no data.  I've tried changing the variable $V{reportName} Evaluation Time, but no luck.  Can anybody help me?

Thanks.

PS: It is using mssql data adapter and the current querystring does not return any row.  To return rows, change 2=1 to 1=1.

<?xml version="1.0" encoding="UTF-8"?><!-- Created with Jaspersoft Studio version 5.6.1.final using JasperReports Library version 5.6.1  --><!-- 2017-05-01T15:39:40 --><jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports"               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"               xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"               name="Evaluate" pageWidth="595" pageHeight="842"               whenNoDataType="AllSectionsNoDetail" columnWidth="555"               leftMargin="20" rightMargin="20" topMargin="20"               bottomMargin="20" uuid="a736ce53-7e76-4194-9086-96d2270a6250">    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="SQLEXPRESSR2"/>    <parameter name="ReportType" class="java.lang.String">        <defaultValueExpression><![CDATA["A"]]></defaultValueExpression>    </parameter>    <queryString language="SQL">        <![CDATA[select Col1 from (values (1),(2)) as a(Col1) where 2=1]]>    </queryString>    <field name="Col1" class="java.lang.Integer"/>    <variable name="ReportName" class="java.lang.String">        <variableExpression><![CDATA[$P{ReportType}.equals("A")? $V{reportTitleA}:$V{reportTitleB}]]></variableExpression>    </variable>    <variable name="reportTitleA" class="java.lang.String">        <variableExpression><![CDATA["Report A"]]></variableExpression>    </variable>    <variable name="reportTitleB" class="java.lang.String">        <variableExpression><![CDATA["Report Other"]]></variableExpression>    </variable>    <pageHeader>        <band height="22" splitType="Stretch">            <textField evaluationTime="Report">                <reportElement x="0" y="0" width="390" height="20"                                uuid="98c519b9-7350-4cd6-a71e-f2fb1c0e7b80"/>                <textFieldExpression><![CDATA[$V{ReportName}]]></textFieldExpression>            </textField>        </band>    </pageHeader>    <columnHeader>        <band height="14" splitType="Stretch"/>    </columnHeader>    <detail>        <band height="15" splitType="Stretch">            <property name="local_mesure_unitheight" value="pixel"/>            <property name="com.jaspersoft.studio.unit.height" value="px"/>            <textField>                <reportElement x="0" y="0" width="100" height="14"                                uuid="82ab5741-1138-4173-88f5-42ef07a6cb9f">                    <property name="local_mesure_unitheight" value="pixel"/>                    <property name="com.jaspersoft.studio.unit.height" value="px"/>                </reportElement>                <textFieldExpression><![CDATA[$F{Col1}]]></textFieldExpression>            </textField>        </band>    </detail></jasperReport>[/code]

[mlopez_1]

Use paramaters for this purpose instead. Is what I use.

Mariano

[nessrineselmi215]

its simply

[szaharia]

Hi,

In order to be properly evaluated, the variable ReportName should be placed after reportTitleA and reportTitleB. You also need to set the initial value expressions for all variables:

    <variable name="reportTitleA" class="java.lang.String">        <variableExpression><![CDATA["Report A"]]></variableExpression>        <initialValueExpression><![CDATA["Report A"]]></initialValueExpression>    </variable>    <variable name="reportTitleB" class="java.lang.String">        <variableExpression><![CDATA["Report Other"]]></variableExpression>        <initialValueExpression><![CDATA["Report Other"]]></initialValueExpression>    </variable>    <variable name="ReportName" class="java.lang.String">        <variableExpression><![CDATA[$P{ReportType}.equals("A")? $V{reportTitleA}:$V{reportTitleB}]]></variableExpression>        <initialValueExpression><![CDATA[$P{ReportType}.equals("A")? $V{reportTitleA}:$V{reportTitleB}]]></initialValueExpression>    </variable>[/code]