问如何使用C#和OpenXml访问Word文档中大纲的编号？

EN

<w:p w:rsidR="004265BF" w:rsidP="00AD13B6" w:rsidRDefault="00AD13B6">
 <w:pPr>
  <w:pStyle w:val="ListParagraph" />
  <w:numPr>
   <w:ilvl w:val="0" />
   <w:numId w:val="2" />
  </w:numPr>
 </w:pPr>
 <w:r>
  <w:t>Requirements</w:t>
 </w:r>
</w:p>
<w:p w:rsidR="00AD13B6" w:rsidP="00AD13B6" w:rsidRDefault="00AD13B6">
 <w:pPr>
  <w:pStyle w:val="ListParagraph" />
   <w:numPr>
    <w:ilvl w:val="1" />
    <w:numId w:val="2" />
   </w:numPr>
  </w:pPr>
  <w:r>
   <w:t>Performance</w:t>
  </w:r>
</w:p>

using (WordprocessingDocument doc = WordprocessingDocument.Open("word-wrP.docx", true))
        {
            Body body = doc.MainDocumentPart.Document.Body;

            //Documents' numbering definition
            Numbering num = doc.MainDocumentPart.NumberingDefinitionsPart.Numbering;

            //Get all paragraphs in the document
            IEnumerable<Paragraph> paragraphs = doc.MainDocumentPart.Document.Body.OfType<Paragraph>();
            foreach (Paragraph paragraph in paragraphs)
            {
                int tempLevel = 0; 
             
                //Each paragraph has a reference to a numbering definition that is defined by the numbering ID
                NumberingId numId = paragraph.ParagraphProperties.NumberingProperties.NumberingId;

                //NumberingLevelReference defines the outline level or the "indent" of Numbering, index starts at Zero.
                NumberingLevelReference iLevel =
                    paragraph.ParagraphProperties.NumberingProperties.NumberingLevelReference;

                //From the numbering reference we get the actual numbering definition to get start value of the outline etc etc.
                var firstOrDefault =
                    num.Descendants<NumberingInstance>().FirstOrDefault(tag => tag.NumberID == (int)numId.Val);
                if (firstOrDefault != null)
                {
                    var absNumId =
                        firstOrDefault.GetFirstChild<AbstractNumId>();
                    AbstractNum absNum =
                        num.OfType<AbstractNum>().FirstOrDefault(tag => tag.AbstractNumberId == (int)absNumId.Val);
                    if (absNum != null)
                    {
                        StartNumberingValue start = absNum.OfType<StartNumberingValue>().FirstOrDefault();
                        // once you have the start value its just a matter of counting the paragraphs that have the same numberingId and from the Number
                        //ingLevel you can calculate the actual values that correspond to each paragraph.
                        if (start != null) startValue = start.Val;
                    }
                }
                else
                {
                    Console.WriteLine("Failed!");
                }
            }
        }