NPOI 替换word模版

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            string fileName = @"C:\Users\Admin\Desktop\322.docx";
            XWPFDocument document = null;
            try
            {
                using (FileStream file = new FileStream(fileName, FileMode.Open, FileAccess.Read))
                {
                    document = new XWPFDocument(file);
                }

                using (FileStream stream = File.OpenRead(fileName))
                {
                    XWPFDocument doc = new XWPFDocument(stream);
                    //遍历段落
                    foreach (var para in doc.Paragraphs)
                    {
                        ReplaceKey(para);
                    }
                    //遍历表格
                    var tables = doc.Tables;
                    foreach (var table in tables)
                    {
                        foreach (var row in table.Rows)
                        {
                            foreach (var cell in row.GetTableCells())
                            {
                                foreach (var para in cell.Paragraphs)
                                {
                                    ReplaceKey(para);
                                }
                            }
                        }
                    }
                    using (MemoryStream ms = new MemoryStream())
                    {

                        doc.Write(ms);
                        using (FileStream fsWrite = new FileStream(@"D:\1.txt", FileMode.Append))
                        {
                            fsWrite.Write(ms.ToArray(), , ms.ToArray().Length);
                        };
                    }

                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(string.Format("文件{0}打开失败，错误：{1}", new string[] { fileName, ex.ToString() }));
            }
        }

        private void ReplaceKey(XWPFParagraph para)
        {

            string text = para.ParagraphText;
            var runs = para.Runs;
            string styleid = para.Style;
            for (int i = ; i < runs.Count; i++)
            {
                var run = runs[i];
                text = run.ToString();
                runs[i].SetText(text+, );
            }
        }