.net wpf gridcontrol怎么快速导出excel数据,调用的是本地的模板


//导出方法
        void ExportExcelMethod(object param)
        {
            if (ObsTB.Count < 1)
            {
                MessageBox.Show("没有要导出的数据");
                return;
            }
            Excel.Application objApp = new Excel.Application(); //实例化Excle对象
            if (objApp == null)
            {
                MessageBox.Show("无法创建Excel对象，可能计算机未安装Excel！");
                return;
            }            string path = Invoice.Utils.Validation.AppPath();
            objApp.Workbooks.Add(path + @"Excel/发票使用情况一览表.xls");            Excel.Sheets objSheets = objApp.Worksheets;//实例化sheet工作表的集合
            Excel._Worksheet objSheet;
            objSheet = (Excel._Worksheet)objSheets.get_Item(1);//导出sheet1模板
            objSheet.Name = "发票使用情况一览表";
            objApp.Workbooks[1].SaveCopyAs("D:/ceshi.xls");
            objApp.Workbooks[1].BeforeClose += new Excel.WorkbookEvents_BeforeCloseEventHandler(VMFPHeadQuery_BeforeClose);
            
            //设置表头名称
            objApp.Cells[1, 1] = "发票使用情况一览表";
            //设置数据行的格式边框
            objApp.get_Range(objApp.Cells[1, 1], objApp.Cells[obsTB.Count + 3, 19]).Borders.LineStyle = 1;
            objApp.get_Range(objApp.Cells[1, 1], objApp.Cells[1, 19]).Interior.ColorIndex = 2;
            //设置标题字体大小
            objApp.get_Range(objApp.Cells[1, 1], objApp.Cells[1, 19]).Font.Size = 18;
            //设置内容字体大小
            objApp.get_Range(objApp.Cells[4, 1], objApp.Cells[this.ObsTB.Count + 3, 19]).Font.Size = 10;
            objApp.Cells[2, 1] = "生成时间：" + DateTime.Now.Year + "年" + DateTime.Now.Month + "月" + DateTime.Now.Day + "日";            for (int i = 0; i < this.ObsTB.Count; i++)
            {
                ;
                objApp.Cells[4 + i, 1] = i + 1;
                objApp.Cells[4 + i, 2] = UtilsConverter.GetPJtypNameByPJtyp(ObsTB[i].Pjtype);
                objApp.Cells[4 + i, 3] = ObsTB[i].Fptype;                objApp.Cells[4 + i, 4] = "'" + ObsTB[i].Fpconde;
                objApp.Cells[4 + i, 5] = "'" + ObsTB[i].Fpnum;                objApp.Cells[4 + i, 6] = "'" + ObsTB[i].Dhp;                objApp.Cells[4 + i, 7] = UtilsConverter.GetKJZTNameBykjzt(ObsTB[i].Status1);
                objApp.Cells[4 + i, 8] = "'" + ObsTB[i].Oper1;
                objApp.Cells[4 + i, 9] = "'" + ObsTB[i].Gentime1;                objApp.Cells[4 + i, 10] = UtilsConverter.GetZFZTNameByzfzt(ObsTB[i].Status2);
                objApp.Cells[4 + i, 11] = "'" + ObsTB[i].Oper2;
                objApp.Cells[4 + i, 12] = "'" + ObsTB[i].Gentime2;                objApp.Cells[4 + i, 13] = UtilsConverter.GetPDZTNameByPdzt(ObsTB[i].Status3);
                objApp.Cells[4 + i, 14] = "'" + ObsTB[i].Oper3;
                objApp.Cells[4 + i, 15] = "'" + ObsTB[i].Gentime3;                objApp.Cells[4 + i, 16] = UtilsConverter.GetHXZTNameByzfzt(ObsTB[i].Status5);
                objApp.Cells[4 + i, 17] = "'" + ObsTB[i].Oper5;
                objApp.Cells[4 + i, 18] = "'" + ObsTB[i].Gentime5;
                objApp.Cells[4 + i, 19] = "'" + ObsTB[i].Bz;            }
            objApp.Visible = true;
            objApp.DisplayAlerts = false;
            Print(objApp, objSheet);
          
            GC.Collect();这是我现在的做法但是，1w条数据导出就需要好多时间。求高手怎样才能让他得导出速度快一点。在线等。。