mvc导出excel

前端

     ///导出Excel
        function Export() {
            var beginTime = Ext.getCmp('ksrq').getRawValue();
            var endTime = Ext.getCmp('jzrq').getRawValue();
            if (!Ext.fly('frmDummy')) {
                var frm = document.createElement('form');
                frm.id = 'frmDummy';
                frm.name = id;
                frm.className = 'x-hidden';
                document.body.appendChild(frm);
            }
            Ext.Ajax.request({
                url: '/Manager/WF_Report/FileExportExcel',
                method: 'POST',
                form: Ext.fly('frmDummy'),
                isUpload: true,
                params: { 'beginTime': beginTime, 'endTime': endTime }
            });
        }

后台

        public FileResult FileExportExcel(string beginTime, string endTime)
        {
            string SQL = "SELECT * FROM p_view_mxcx WHERE p_view_param.set_beginTime('" + beginTime + "')>='" + beginTime + "' and p_view_param.set_endTime('" + endTime + "')<='" + endTime + "'";
            DataTable dt = DBhelper.Query(SQL).Tables[0];
            string filePath = OperateExcel.ExportToExcel(dt, DateTime.Now.ToString("yyyyMMddHHmmss"));

            return File(Server.MapPath(filePath), "application/ms-excel", Path.GetFileName(filePath));
        }