NPOI处理Word文本中上下角标

读取Word文档，并将文本转成html标签，后面发现，经常有带上下角标的内容，于是一并处理了。

核心在于对XWPFRun对象中Subscript属性的处理。

         /// <summary>
         /// 读取Word,并识别文本中的上下角标
         /// </summary>
         /// <param name="fileName"></param>
         /// <returns></returns>
         public static string ReadWordTextExWithSubscript(string fileName)
         {

             string fileText = string.Empty;
             StringBuilder sbFileText = new StringBuilder();

             #region 打开文档
             XWPFDocument document = null;
             try
             {
                 using (FileStream file = new FileStream(fileName, FileMode.Open, FileAccess.Read))
                 {
                     document = new XWPFDocument(file);
                 }
             }
             catch (Exception e)
             {
                 throw e;
             }
             #endregion
             //正文段落
             foreach (XWPFParagraph paragraph in document.Paragraphs)
             {
                 //获取段楼中的句列表
                 IList<XWPFRun> runsLists = paragraph.Runs;

                 sbFileText.Append("<p>");
                 foreach (XWPFRun run in runsLists)
                 {
                     switch (run.Subscript)
                     {
                         case VerticalAlign.BASELINE:
                             sbFileText.Append(run.Text);
                             break;
                         //上角标
                         case VerticalAlign.SUPERSCRIPT:
                             sbFileText.Append("<sup>" + run.Text + "</sup>");
                             break;
                         //下角标
                         case VerticalAlign.SUBSCRIPT:
                             sbFileText.Append("<sub>" + run.Text + "</sub>");
                             break;
                         default:
                             sbFileText.Append(run.Text);
                             break;
                     }

                 }
                 sbFileText.AppendLine("</p>");
             }
             fileText = sbFileText.ToString();

             return fileText;
         }

Word文档：

输出：

<p>测试^上_下ok。</p>
<p>CO₂</p>
<p>面积约6000km²</p>

Html预览：