网上找了好多文章都没有准确的操作word表格换行的操作，参考网上文章摸索了一天的成果记录一下。

一、word表格，注意要设置表格高度自动

二、代码

 public static void CreateWoedFile()
    {
      try
      {
        string temp_path = AppDomain.CurrentDomain.BaseDirectory + @"Files\Temp\{0}\".Ft(DateTime.Now.ToString("yyyyMMdd"));//临时文件路径

        var file_name2 = $"{DateTime.Now.ToString("yyyyMMddhhmmss")}.docx";//文件名称转换生成

        var Temp_url = @"C:\Users\Administrator\Desktop\test.docx";
        Stream workstream = System.IO.File.OpenRead(Temp_url);
        XWPFDocument workdoctemp = new XWPFDocument(workstream);

        int iRow = 0;//表中行的循环索引
        int iCell = 0;//表中列的循环索引

        var IndexNoList = new List<string>() { "1", "2", "3", "4" };
        var NameList = new List<string>() { "张三", "李四", "小明", "小红" };
        var DateList = new List<string>() { "2022/02/03", "2022/02/03", "2022/02/03", "2022/02/03" };

        foreach (var table in workdoctemp.Tables)
        {
          //2.循环表格行
          foreach (XWPFTableRow row in table.Rows)
          {
            iRow = table.Rows.IndexOf(row);//获取该循环在List集合中的索引
            foreach (XWPFTableCell cell in row.GetTableCells())
            {
              iCell = row.GetTableCells().IndexOf(cell);//获取该循环在List集合中的索引
              IList<XWPFParagraph> listXWPFParagraph = cell.Paragraphs;
              string mark = string.Empty;
              foreach (var para in listXWPFParagraph)
              {
                //这里不能操作Cell不然会报错
                if (para.ParagraphText.IndexOf("index_no") >= 0)
                {
                  mark = "index_no";
                }
                if (para.ParagraphText.IndexOf("name") >= 0)
                {
                  mark = "name";
                }
                if (para.ParagraphText.IndexOf("date") >= 0)
                {
                  mark = "date";
                }
              }

              switch (mark)
              {
                case "index_no":
                  cell.RemoveParagraph(0);//删掉原有的内容
                  IndexNoList.ForEach(x =>
                  {
                    var newcell = cell.AddParagraph();//创建一行
                    //newcell.Alignment = ParagraphAlignment.CENTER;//文字剧中
                    var newrun = newcell.CreateRun();//创建一个集合
                    newrun.SetText("\n\r" + x);//设置内容
                    newrun.FontSize = 10;
                    var count = cell.Paragraphs.Count;
                    cell.Paragraphs[count - 1].AddRun(newrun);
                  });
                  break;
                case "name":
                  cell.RemoveParagraph(0);//删掉原有的内容
                  NameList.ForEach(x =>
                  {
                    var newcell = cell.AddParagraph();//创建一行
                    //newcell.Alignment = ParagraphAlignment.CENTER;//文字剧中
                    var newrun = newcell.CreateRun();//创建一个集合
                    newrun.SetText("\n\r" + x);
                    newrun.FontSize = 10;
                    var count = cell.Paragraphs.Count;
                    cell.Paragraphs[count - 1].AddRun(newrun);
                  });
                  break;
                case "date":
                  cell.RemoveParagraph(0);//删掉原有的内容
                  DateList.ForEach(x =>
                  {
                    var newcell = cell.AddParagraph();//创建一行
                    //newcell.Alignment = ParagraphAlignment.CENTER;//文字剧中
                    var newrun = newcell.CreateRun();//创建一个集合
                    newrun.SetText("\n\r" + x);
                    newrun.FontSize = 10;
                    var count = cell.Paragraphs.Count;
                    cell.Paragraphs[count - 1].AddRun(newrun);
                  });
                  break;
              }
            }
          }
        }
        if (!Directory.Exists(temp_path))
          Directory.CreateDirectory(temp_path);
        using (FileStream fileSave = new FileStream(temp_path + file_name2, FileMode.Create, FileAccess.Write))
        {
          workdoctemp.Write(fileSave);
        }
      }
      catch (Exception ex)
      {

      }

    }

三、效果