Jasper reports 如果详细信息标注栏中至少有一个非空字段，则当表达式显示静态文本时打印

我想在静态文本上设置printWhenExpression，其条件是，仅当detail band中的特定列中至少有一个非空文本字段时，才打印标签

它类似于仅当列中有非空字段时才打印列标题

我试着用这个表达式：

$F{textfield}=null

，但它仅适用于第一条记录，如果第一条记录为null，而第二条记录没有null值，则标签将隐藏在我们希望显示的位置

如果您需要更多信息，请回复

下面是我的.jrxml文件

---

通过在表的列标题的“Column print when”属性下提供print when条件，您可以使用Table Component来实现这一点，而不是使用静态文本

i、 e.列打印时间=$F{messageType}=空的

PFB更正的JRXML:

<summary>

    <band height="55" splitType="Stretch">
        <componentElement>
            <reportElement uuid="632c8fad-e35f-4b89-b28e-b363b0711c06" x="0" y="0" width="270" height="55"/>
            <jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
                <datasetRun subDataset="Table Dataset 1" uuid="bf16282a-8672-46cb-9849-4966b5f8c969">
                    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JREmptyDataSource(1)]]></dataSourceExpression>
                </datasetRun>
                <jr:column width="90" uuid="00429e67-6d71-4b66-9eb4-22d0c649e7a4">
                    <jr:columnHeader height="30" rowSpan="1">
                        <staticText>
                            <reportElement uuid="a62a81ca-ceae-4178-9e4e-6ca17fc89c69" key="staticText-2" mode="Opaque" x="0" y="0" width="90" height="30" forecolor="#000000" backcolor="#CCCCCC">
                                <printWhenExpression><![CDATA[new Boolean($F{messageType}!=null)]]></printWhenExpression>
                            </reportElement>
                            <box>
                                <pen lineWidth="0.25" lineColor="#000000"/>
                                <topPen lineWidth="0.25" lineColor="#000000"/>
                                <leftPen lineWidth="0.25" lineColor="#000000"/>
                                <bottomPen lineWidth="0.25" lineColor="#000000"/>
                                <rightPen lineWidth="0.25" lineColor="#000000"/>
                            </box>
                            <textElement textAlignment="Center" verticalAlignment="Middle">
                                <font fontName="Arial" isBold="true" pdfFontName="Helvetica-Bold"/>
                            </textElement>
                            <text><![CDATA[Signature Name]]></text>
                        </staticText>
                    </jr:columnHeader>
                    <jr:detailCell height="20" rowSpan="1">
                        <textField isStretchWithOverflow="true" isBlankWhenNull="true">
                            <reportElement uuid="cb654043-45a4-4742-86ed-ed9818716db2" key="textField" stretchType="RelativeToTallestObject" x="0" y="0" width="90" height="20">
                                <printWhenExpression><![CDATA[new Boolean($F{messageType}!=null)]]></printWhenExpression>
                            </reportElement>
                            <box leftPadding="5" rightPadding="10">
                                <topPen lineWidth="0.25" lineColor="#999999"/>
                                <leftPen lineWidth="0.25" lineColor="#999999"/>
                                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                                <rightPen lineWidth="0.25" lineColor="#999999"/>
                            </box>
                            <textElement>
                                <font fontName="Arial"/>
                            </textElement>
                            <textFieldExpression><![CDATA[$F{signatureClassification}]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
                <jr:column width="90" uuid="7ebf1fdd-52e5-43da-96f0-1c01a7cb0876">
                    <printWhenExpression><![CDATA[$F{messageType}!=null]]></printWhenExpression>
                    <jr:columnHeader height="30" rowSpan="1">
                        <staticText>
                            <reportElement uuid="d96cce84-1318-49aa-a6d2-3a17e4329ef3" key="staticText-11" mode="Opaque" x="0" y="0" width="90" height="30" forecolor="#000000" backcolor="#CCCCCC">
                                <printWhenExpression><![CDATA[new Boolean($F{messageType}!=null)]]></printWhenExpression>
                            </reportElement>
                            <box>
                                <pen lineWidth="0.25" lineColor="#000000"/>
                                <topPen lineWidth="0.25" lineColor="#000000"/>
                                <leftPen lineWidth="0.25" lineColor="#000000"/>
                                <bottomPen lineWidth="0.25" lineColor="#000000"/>
                                <rightPen lineWidth="0.25" lineColor="#000000"/>
                            </box>
                            <textElement textAlignment="Center" verticalAlignment="Middle">
                                <font fontName="Arial" isBold="true" pdfFontName="Helvetica-Bold"/>
                            </textElement>
                            <text><![CDATA[Type]]></text>
                        </staticText>
                    </jr:columnHeader>
                    <jr:detailCell height="20" rowSpan="1">
                        <textField isStretchWithOverflow="true" isBlankWhenNull="true">
                            <reportElement uuid="4832a90d-505e-4f13-87bf-0a7fe6e3a00f" key="textField-7" stretchType="RelativeToTallestObject" x="0" y="0" width="90" height="20">
                                <printWhenExpression><![CDATA[$F{messageType}]]></printWhenExpression>
                            </reportElement>
                            <box leftPadding="5">
                                <topPen lineWidth="0.25" lineColor="#999999"/>
                                <leftPen lineWidth="0.25" lineColor="#999999"/>
                                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                                <rightPen lineWidth="0.25" lineColor="#999999"/>
                            </box>
                            <textElement textAlignment="Left">
                                <font fontName="Arial"/>
                            </textElement>
                            <textFieldExpression><![CDATA[$F{messageType}]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
                <jr:column width="90" uuid="89b50640-0509-4b61-8aa3-aa68eb3e6685">
                    <jr:columnHeader height="30" rowSpan="1">
                        <staticText>
                            <reportElement uuid="fe68d8bf-3f0d-4202-a53c-8c6f328e4d16" key="staticText-3" mode="Opaque" x="0" y="0" width="90" height="30" forecolor="#000000" backcolor="#CCCCCC"/>
                            <box>
                                <pen lineWidth="0.25" lineColor="#000000"/>
                                <topPen lineWidth="0.25" lineColor="#000000"/>
                                <leftPen lineWidth="0.25" lineColor="#000000"/>
                                <bottomPen lineWidth="0.25" lineColor="#000000"/>
                                <rightPen lineWidth="0.25" lineColor="#000000"/>
                            </box>
                            <textElement textAlignment="Center" verticalAlignment="Middle">
                                <font fontName="Arial" isBold="true" pdfFontName="Helvetica-Bold"/>
                            </textElement>
                            <text><![CDATA[Event Count]]></text>
                        </staticText>
                    </jr:columnHeader>
                    <jr:detailCell height="20" rowSpan="1">
                        <textField isStretchWithOverflow="true" isBlankWhenNull="true">
                            <reportElement uuid="169af53a-b587-4d63-93f8-cb9296c89f4c" key="textField" stretchType="RelativeToTallestObject" x="0" y="0" width="90" height="20"/>
                            <box leftPadding="5" rightPadding="10">
                                <topPen lineWidth="0.25" lineColor="#999999"/>
                                <leftPen lineWidth="0.25" lineColor="#999999"/>
                                <bottomPen lineWidth="0.25" lineColor="#999999"/>
                                <rightPen lineWidth="0.25" lineColor="#999999"/>
                            </box>
                            <textElement textAlignment="Right">
                                <font fontName="Arial"/>
                            </textElement>
                            <textFieldExpression><![CDATA[$F{formattedCount}]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
            </jr:table>
        </componentElement>
    </band>
</summary>