string tmppath = HttpContext.Current.Server.MapPath("模板.doc");//生成word的模板路径
Document doc = new Document(tmppath); //载入模板
Bookmark mark = doc.Range.Bookmarks["word中书签名称"];
mark.Text = “赋值”;
doc.Save(HttpContext.Current.Server.MapPath(“新生成word的保存路径”), SaveFormat.Doc);