如何使用openxml sdk和c#在word文档中添加多级列表？

Question

I am trying to implement multilevel list in word document programmatically using openxml sdk v2.5 and C#. I have used the following code in order to display headings in multilevel list. I am calling the AddHeading method and passing the respective parameters as shown below. My expected result is to be as below.

1.  Parent
    1.1. childItem
      1.1.1. subchildItem
    1.2. childItem
2.  Parent
    2.1. childItem
3.  Parent

But the output i am getting is

1. Parent
    1. childItem
      1. subchildItem
    2. childItem
2.  Parent
    1. childItem
3.  Parent

public static void AddHeading(WordprocessingDocument document, string colorVal, int fontSizeVal, string styleId, string styleName, string headingText, int numLvlRef, int numIdVal)
        {
            StyleRunProperties styleRunProperties = new StyleRunProperties();
            Color color = new Color() { Val = colorVal };
            DocumentFormat.OpenXml.Wordprocessing.FontSize fontSize1 = new DocumentFormat.OpenXml.Wordprocessing.FontSize();
            fontSize1.Val = new StringValue(fontSizeVal.ToString());

            styleRunProperties.Append(color);
            styleRunProperties.Append(fontSize1);
            AddStyleToDoc(document.MainDocumentPart.Document.MainDocumentPart, styleId, styleName, styleRunProperties, document);

            Paragraph p = new Paragraph();
            ParagraphProperties pp = new ParagraphProperties();
            pp.ParagraphStyleId = new ParagraphStyleId() { Val = styleId };
            pp.SpacingBetweenLines = new SpacingBetweenLines() { After = "0" };

            ParagraphStyleId paragraphStyleId1 = new ParagraphStyleId() { Val = "ListParagraph" };
            NumberingProperties numberingProperties1 = new NumberingProperties();
            NumberingLevelReference numberingLevelReference1 = new NumberingLevelReference() { Val = numLvlRef };

            NumberingId numberingId1 = new NumberingId() { Val = numIdVal }; //Val is 1, 2, 3 etc based on your numberingid in your numbering element

            numberingProperties1.Append(numberingLevelReference1); Indentation indentation1 = new Indentation() { FirstLineChars = 0 };
            numberingProperties1.Append(numberingId1);
            pp.Append(paragraphStyleId1);
            pp.Append(numberingProperties1);
            pp.Append(indentation1);
            p.Append(pp);
            Run r = new Run();
            Text t = new Text(headingText) { Space = SpaceProcessingModeValues.Preserve };
            r.Append(t);
            p.Append(r);

            document.MainDocumentPart.Document.Body.Append(p);
        }


      public static void AddStyleToDoc(MainDocumentPart mainPart, string styleid, string stylename, StyleRunProperties styleRunProperties, WordprocessingDocument document)
        {
            StyleDefinitionsPart part = mainPart.StyleDefinitionsPart;
            if (part == null)
            {
                part = AddStylesPartToPackage(mainPart);
                AddNewStyle(part, styleid, stylename, styleRunProperties);
            }
            else
            {
                if (IsStyleIdInDocument(mainPart, styleid) != true)
                {
                    string styleidFromName = GetStyleIdFromStyleName(document, stylename);
                    if (styleidFromName == null)
                    {
                        AddNewStyle(part, styleid, stylename, styleRunProperties);
                    }
                    else
                        styleid = styleidFromName;
                }
            }
        }

        public static string GetStyleIdFromStyleName(WordprocessingDocument doc, string styleName)
        {
            StyleDefinitionsPart stylePart = doc.MainDocumentPart.StyleDefinitionsPart;
            string styleId = stylePart.Styles.Descendants<StyleName>()
                .Where(s => s.Val.Value.Equals(styleName) &&
                    (((Style)s.Parent).Type == StyleValues.Paragraph))
                .Select(n => ((Style)n.Parent).StyleId).FirstOrDefault();

            return styleId;
        }

        public static StyleDefinitionsPart AddStylesPartToPackage(MainDocumentPart mainPart)
        {
            StyleDefinitionsPart part;
            part = mainPart.AddNewPart<StyleDefinitionsPart>();
            DocumentFormat.OpenXml.Wordprocessing.Styles root = new DocumentFormat.OpenXml.Wordprocessing.Styles();
            root.Save(part);
            return part;
        }

        public static bool IsStyleIdInDocument(MainDocumentPart mainPart, string styleid)
        {
            DocumentFormat.OpenXml.Wordprocessing.Styles s = mainPart.StyleDefinitionsPart.Styles;

            int n = s.Elements<DocumentFormat.OpenXml.Wordprocessing.Style>().Count();
            if (n == 0)
                return false;

            DocumentFormat.OpenXml.Wordprocessing.Style style = s.Elements<DocumentFormat.OpenXml.Wordprocessing.Style>()
                .Where(st => (st.StyleId == styleid) && (st.Type == StyleValues.Paragraph))
                .FirstOrDefault();
            if (style == null)
                return false;

            return true;
        }

        private static void AddNewStyle(StyleDefinitionsPart styleDefinitionsPart, string styleid, string stylename, StyleRunProperties styleRunProperties)
        {
            DocumentFormat.OpenXml.Wordprocessing.Styles styles = styleDefinitionsPart.Styles;

            DocumentFormat.OpenXml.Wordprocessing.Style style = new DocumentFormat.OpenXml.Wordprocessing.Style()
            {
                Type = StyleValues.Paragraph,
                StyleId = styleid,
                CustomStyle = false
            };
            style.Append(new StyleName() { Val = stylename });
            style.Append(new BasedOn() { Val = "Normal" });
            style.Append(new NextParagraphStyle() { Val = "Normal" });
            style.Append(new UIPriority() { Val = 900 });

            styles.Append(style);
        }

Answer 1

To use multi-level lists in Microsoft Word, you need to ensure that:

1. you have the desired multi-level list set up correctly in your numbering definitions part (meaning your w:numbering element contains a w:num and corresponding w:abstractNum that specifies the different list levels);
2. you have one style for each list level that references both the numbering ID specified by the w:num element and the desired list level; and
3. your paragraphs reference the correct style for the list level.

Please have a look at my answers on how to create multi-level ordered lists with Open XML and display multi-level lists in Word documents using C# and the Open XML SDK for further details and explanations.