I am trying to create an TOC for a Word document

[Sysviewsoft]

Hi,
I've been looking for a way to create a Table of content for my Word document. I have placed this code block to add the table of contents:

Code: Select all

Section section = doc.addSection();
            TableOfContent table = new TableOfContent(doc, "{\\o \"1-9\" \\h \\z \\u}");           
            Paragraph paragraph = section.addParagraph();
            paragraph.appendTOC(1, 2);
            paragraph.getItems().add(table);
            doc.updateTableOfContents();

It gives me an error:
java.lang.NullPointerException: Cannot invoke "com.spire.doc.packages.sprhds.spr??()" because the return value of "com.spire.doc.packages.sprwks.spr??()" is null

I have previously created several sections in my document.

[Doris.Liu]

Hi,

Thank you for your inquiry.
Please append FieldMark before apdateTableOfContents(), you can refer code below for details.
If there's still any issue, please provide your test document for our further investigation and test. Thanks in advance.

Code: Select all

        Document doc = new Document();
        Section section = doc.addSection();
        TableOfContent table = new TableOfContent(doc, "{\\o \"1-9\" \\h \\z \\u}");
        Paragraph paragraph = section.addParagraph();
        paragraph.appendTOC(1, 2);
        paragraph.getItems().add(table);
        paragraph.appendFieldMark(FieldMarkType.Field_Separator);
        paragraph.appendFieldMark(FieldMarkType.Field_End);
        doc.updateTableOfContents();

Sincerely,
Doris
E-iceblue support team