JasperReports: Hide frame B within frame A, if one the fields inside frame B is null or is empty

问题

I am having a problem in jasper reports regarding designing a document template. It's like a resume.

I have this document:

Title [static text]

Age [static text] | [some field A]

Gender [static text] | [some field B]

Location [static text] | [some field C]

The current structure of my jasper reports is this:

I have this frame A, which has a vertical layout. Every row in the template (age, gender, location) corresponds to the frame I've created frames 1, 2 and 3.

Say, frame 1 has horizontal layout with 'Age [static text]' and '[some field A]' as its contents. The applies to frames 2 and 3.

Frame 1 has a position type of fix relative to top, while frames 2 and 3 are in float.

I want the row gender be hidden and be moved upwards if [some field] B is null or empty. How can I do that?

I've tried working on Remove Line When Blank but it only works inside a frame which has several fields in it. Basically, I want frame 1 to be hidden and have frames 2 and 3 be moved upwards if [some field A] is null or empty.

I hope for the soonest response.

回答1:

To achieve you desired result set:

positionType="Float" on the reportElement inside the frame (it needs to move on the basis of the other elements.
isRemoveLineWhenBlank="true", to remove it if its not visible according to printWhenExpression
Include the check for all the fields inside the frame in the printWhenExpression es. new Boolean($F{field1}==null || $F{field2}==null || $F{field3}==null)

Example

<frame>
   <reportElement positionType="Float" x="13" y="12" width="287" height="35" isRemoveLineWhenBlank="true" uuid="ee6707a4-bcb4-402b-95c0-6f4613747d2f">
      <printWhenExpression><![CDATA[new Boolean($F{field1}==null || $F{field2}==null || $F{field3}==null)]]></printWhenExpression>
       .. your textFields ...
   </reportElement>
</frame>

NOTE: for compatibility with jasper report 3 and jdk 1.4 I have used new Boolean(...) this is not necessary in jasper report 5,6

来源：https://stackoverflow.com/questions/34126032/jasperreports-hide-frame-b-within-frame-a-if-one-the-fields-inside-frame-b-is

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