NPOI 操作Word

 　　　　/// <summary>
        /// 替换word中指定内容
        /// </summary>
        /// <param name="wordPath">路径</param>
        /// <param name="keyName">被替换内容</param>
        /// <param name="keyValue">替换内容</param>
        /// <returns></returns>
        public string ReplaceValueByKeyName(string wordPath, string keyName, string keyValue)
        {
            FileStream fs = new FileStream(wordPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
            XWPFDocument docx = new XWPFDocument(fs);//打开07（.docx）以上的版本的文档
            //遍历word中的段落
            foreach (var para in docx.Paragraphs)
            {
                if (!para.ParagraphText.Contains(keyName)) continue;
                para.ReplaceText(para.ParagraphText, keyValue);
// NewLine(para, "测试换行");
            }

            FileStream output = new FileStream(wordPath, FileMode.Create);
            docx.Write(output);
            fs.Close();
            fs.Dispose();
            output.Close();
            output.Dispose();

            return wordPath;
        }     

 　　　　/// <summary>
        /// 替换指定内容为图片|图片居中
        /// </summary>
        /// <param name="wordPath">文件路径</param>
        /// <param name="keyName">需被替换内容</param>
        /// <param name="imgPath">图片路径</param>
        /// <param name="imgType">图片类型</param>
        public void InsertImgToKey(string wordPath, string keyName, string imgPath, PictureType imgType = PictureType.JPEG)
        {
            FileStream fs = new FileStream(wordPath, FileMode.Open, FileAccess.Read);
            XWPFDocument myDocx = new XWPFDocument(fs);//打开07（.docx）以上的版本的文档
            //遍历word中的段落
            foreach (var para in myDocx.Paragraphs)
            {
                if (!para.ParagraphText.Contains(keyName)) continue;
                para.ReplaceText(para.ParagraphText, string.Empty);

                XWPFRun run = para.CreateRun();
                using (FileStream picData = new FileStream(imgPath, FileMode.Open, FileAccess.Read))
                {
                    run.AddPicture(picData, (int)imgType, imgPath, 100 * 9525, 100 * 9525);
                }
                para.Alignment = ParagraphAlignment.CENTER;
                break;
            }

            //遍历表格      
            foreach (var table in myDocx.Tables)
            {
                foreach (var row in table.Rows)
                {
                    foreach (var cell in row.GetTableCells())
                    {
                        foreach (var para in cell.Paragraphs)
                        {
                            if (!para.ParagraphText.Contains(keyName)) continue;
                            para.ReplaceText(para.ParagraphText, string.Empty);

                            XWPFRun run = para.CreateRun();
                            using (FileStream picData = new FileStream(imgPath, FileMode.Open, FileAccess.Read))
                            {
                                run.AddPicture(picData, (int)imgType, imgPath, 100 * 9525, 100 * 9525);
                            }
                            para.Alignment = ParagraphAlignment.CENTER;
                            break;
                        }
                    }
                }
            }

            FileStream output = new FileStream(wordPath, FileMode.Create);
            myDocx.Write(output);
            fs.Close();
            fs.Dispose();
            output.Close();
            output.Dispose();
        }

 换行

 private void NewLine(XWPFParagraph paragraph)
        {
            paragraph.CreateRun().AddCarriageReturn();//新增式换行--当前行之后
            paragraph.CreateRun().SetText("");
            //para.InsertNewRun(row).AddCarriageReturn();  //插入式换行--当前行之前
            //para.InsertNewRun(row).SetText("换行001");
        }

注：换行问题，不同版本的word或者npoi 版本操作方式存在不一致现象，需要亲测

      private void NewLine(XWPFParagraph paragraph, string value)
        {
            value = value + "
";
            //paragraph.CreateRun().AddCarriageReturn();//新增式换行--当前行之后
            paragraph.CreateRun().SetText(value);
            //paragraph.CreateRun().AddCarriageReturn();
            //paragraph.CreateRun().Paragraph.CreateRun().AddCarriageReturn();
            //paragraph.CreateRun().Paragraph.CreateRun().SetText(value);
        }