使用C#中的OpenXML在Word中添加包含文档字段的新段落

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;

string filePath = "path_to_word_document.docx";
using (WordprocessingDocument wordDocument = WordprocessingDocument.Create(filePath, WordprocessingDocumentType.Document))
{
    // 添加文档主体部分
    MainDocumentPart mainPart = wordDocument.AddMainDocumentPart();
    mainPart.Document = new Document();
    Body body = mainPart.Document.AppendChild(new Body());
    
    // 创建一个段落
    Paragraph paragraph = body.AppendChild(new Paragraph());
    
    // 创建一个包含文档字段的新段落
    Run run = paragraph.AppendChild(new Run());
    FieldCode fieldCode = run.AppendChild(new FieldCode("MERGEFIELD FieldName"));
    FieldChar fieldChar = run.AppendChild(new FieldChar() { FieldCharType = FieldCharValues.Begin });
    run.AppendChild(new FieldChar() { FieldCharType = FieldCharValues.Separate });
    run.AppendChild(new Text("Field Value"));
    run.AppendChild(new FieldChar() { FieldCharType = FieldCharValues.End });
}

wordDocument.Close();