protected void btnPrint_Click(object sender, EventArgs e)  
        {
　　　　     string path = Server.MapPath("~\\UploadFiles\\");           //解决方案下的文件夹
            string templatePath = path + "VATInvoiceDocument.doc";      //模板
            WordOp wop = new WordOp();                                  //实例化WordOp类
            wop.OpenTempelte(templatePath);
            wop.FillLable("gongsimingcheng", conType);
            wop.FillLable("huming", this.txtAccountName.Value);
            wop.FillLable("shuihao", this.txtDutyPparagraph.Value);
            wop.FillLable("kaihuhang", this.txtBankAccount.Value);
            wop.FillLable("zhanghao", this.txtAccounts.Value);
            wop.FillLable("dizhi", this.txtAddress.Value);
            wop.FillLable("dianhua", this.txtTelephone.Value);
            wop.FillLable("kaipiaodaima", this.txtBilingCode.Value); 
            wop.FillLable("shenqingrenyuan", this.txtApplicant.Value);
            wop.FillLable("lianxidianhua", this.txtContact.Value);
            wop.FillLable("nian", this.txtYearL.Value);
            wop.FillLable("yue", this.txtMonthL.Value);
            wop.FillLable("ri", this.txtDaysL.Value);
            wop.SaveAs(path + "VATInvoiceDocument1.doc", true);         //将要保存到的Word文档
            wop.Quit();
            Response.Redirect(@"/UploadFiles/VATInvoiceDocument1.doc"); //做个跳转用于下载. 
        }

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Microsoft.Office.Interop.Word;
using System.IO;

namespace CCIR.CorpWebSite.WebPage
{
    public class WordOp
    {
        public WordOp()
        {
            // 
            // TODO: 在此处添加构造函数逻辑 
            // 
        }
        private ApplicationClass WordApp;
        private Document WordDoc;
        private static bool isOpened = false;//判断word模版是否被占用 
        public void SaveAs(string strFileName, bool isReplace)
        {
            if (isReplace && File.Exists(strFileName))
            {
                File.Delete(strFileName);
            }
            object missing = Type.Missing;
            object fileName = strFileName;
            WordDoc.SaveAs(ref fileName, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing,
            ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing);
        }
        //定义一个Word.Application 对象 
        public void activeWordApp()
        {
            WordApp = new ApplicationClass();
        }
        public void Quit()
        {
            object missing = System.Reflection.Missing.Value;
            WordApp.Application.Quit(ref missing, ref missing, ref missing);
            isOpened = false;
        }
        //基于模版新建Word文件 
        public void OpenTempelte(string strTemppath)
        {
            object Missing = Type.Missing;
            //object Missing = System.Reflection.Missing.Value; 
            activeWordApp();
            WordApp.Visible = false;
            object oTemplate = (object)strTemppath;
            try
            {
                while (isOpened)
                {
                    System.Threading.Thread.Sleep(500);
                }
                WordDoc = WordApp.Documents.Add(ref oTemplate, ref Missing, ref Missing, ref Missing);
                isOpened = true;
                WordDoc.Activate();
            }
            catch (Exception Ex)
            {
                Quit();
                isOpened = false;
                throw new Exception(Ex.Message);
            }
        }
        public void FillLable(string LabelId, string Content)
        {
            //打开Word模版 
            // OpenTempelte(tempName); //对LabelId的标签进行填充内容Content,即函件题目项 
            object bkmC = LabelId;
            if (WordApp.ActiveDocument.Bookmarks.Exists(LabelId) == true)
            {
                WordApp.ActiveDocument.Bookmarks.get_Item(ref bkmC).Select();
            }
            WordApp.Selection.TypeText(Content);
            //SaveAs(saveAsFileName); 
            //Quit(); 
        }
    }
}