根据模板导出Excel

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Reflection;
using Excel = Microsoft.Office.Interop.Excel;

namespace WebApplication1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            //生成一个新的文件名用全球唯一标识符 (GUID)来标识
            string newpath = Server.MapPath(".") + @"\Excel\" + Guid.NewGuid() + ".xls";
            //调用的模板文件
            FileInfo mode = new FileInfo(Server.MapPath("~/1.xls"));
            Excel.Application app = new Excel.Application();
            if (app == null)
            {
                return;
            }
            app.Application.DisplayAlerts = false;
            app.Visible = false;

            if (mode.Exists)
            {
                Excel.Workbook tworkbook;
                Object missing = System.Reflection.Missing.Value;

                app.Workbooks.Add(missing);
                //调用模板
                tworkbook = app.Workbooks.Open(mode.FullName, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);
                Excel.Worksheet tworksheet = (Excel.Worksheet)tworkbook.Sheets[2];
                tworksheet.Cells[6, 2] = "测试";
                tworksheet.Cells[8, 2] = "测试";
                tworksheet.SaveAs(newpath, missing, missing, missing, missing, missing, missing, missing, missing, missing);

                tworkbook.Close(false, mode.FullName, missing);
                app.Workbooks.Close();
                app.Quit();
                if (app != null)
                {
                    foreach (System.Diagnostics.Process p in System.Diagnostics.Process.GetProcessesByName("Excel"))
                    {
                        //先判断当前进程是否是excel   
                        if (!p.CloseMainWindow())
                        {
                            p.Kill();
                        }
                    }
                }
                tworkbook = null;
                app = null;
                //强制对所有代进行垃圾回收
                GC.Collect();
            }
            //打开保存对话框
            Response.Clear();
            Response.ClearHeaders();
            Response.Buffer = false;
            Response.Charset = "UTF-8";
            Response.ContentType = "application/ms-excel";
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(mode.Name));
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            Response.AppendHeader("Content-Length", mode.Length.ToString());
            Response.Charset = "";
            this.EnableViewState = false;
            Response.WriteFile(newpath);
            //删除创建的Excel文件
            //FileInfo fileinf = new FileInfo(newpath);
            //fileinf.Delete();
            //关闭连接
            Response.Flush();
            Response.End();
        }
    }
}