C#导出数据到Excel表

private void GenerateAttachment1(DataTable DT)
{
    try
    {
        Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
        if (app == null)
        {
            untCommon.InfoMsg("服务器上缺少Excel组件，需要安装Office软件后重试");
            return;
        }
        app.Visible = false;
        app.UserControl = true;

        string strTempPath = @"D:\!ZhengkuiD\Defence\DefenceMgr\bin\Debug\goodExcel\Old\XXXX.xlsx";  //模板Excel文件的路径
        Microsoft.Office.Interop.Excel.Workbooks workbooks = app.Workbooks;
        Microsoft.Office.Interop.Excel._Workbook workbook = workbooks.Add(strTempPath); //加载模板
        Microsoft.Office.Interop.Excel.Sheets sheets = workbook.Sheets;
        Microsoft.Office.Interop.Excel._Worksheet worksheet = (Microsoft.Office.Interop.Excel._Worksheet)sheets.get_Item(1); //第一个工作薄
        if (worksheet == null)  //工作薄中没有工作表
        {
            return;
        }

        //1、获取数据
        int rowCount = DT.Rows.Count;
        if (rowCount <= 0)
            return;

        //2、写入数据，Excel索引从1开始
        for (int i = 1; i <= rowCount; i++)
        {
            int row_ = 0;
            row_ = 3 + i;  //Excel模板上隐藏标题、表头和标题行共占3行,根据实际模板需要修改

            int dt_row = i - 1; //dataTable的行是从0开始的 

            //开始赋值
            worksheet.Cells[row_, 1] = i.ToString();
            worksheet.Cells[row_, 2] = DT.Rows[dt_row]["Name"].ToString();
        }

        //3、保存生成的Excel文件
        string savePath = @"D:\!ZhengkuiD\Defence\DefenceMgr\bin\Debug\goodExcel\New\XXXX.xlsx";
        workbook.SaveAs(savePath, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

        shuzi++;

        //4、按顺序释放资源
        NAR(worksheet);
        NAR(sheets);
        NAR(workbook);
        NAR(workbooks);
        app.Quit();
        NAR(app);
    }
    catch (Exception)
    {

    }
}