How to export the Grid when we bind the SQL DataSource in ASP.NET?

<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">

    <ej:Grid ID="FlatGrid" runat="server" OnServerExcelExporting="FlatGrid_ServerExcelExporting" OnServerPdfExporting="FlatGrid_ServerPdfExporting" OnServerWordExporting="FlatGrid_ServerWordExporting" AllowPaging="True">   

          <ToolbarSettings ShowToolbar="True" ToolbarItems="excelExport,wordExport,pdfExport" />

        </ej:Grid>

    <asp:SqlDataSource ID="SqlData" runat="server" ConnectionString="<%$ ConnectionStrings:NORTHWNDConnectionString %>"

            SelectCommand="SELECT * FROM [Territories]"></asp:SqlDataSource>

</asp:Content>

protected void FlatGrid_ServerExcelExporting(object sender, Syncfusion.JavaScript.Web.GridEventArgs e)

        {

            ExcelExport exp = new ExcelExport();

            DataView data = (DataView)SqlData.Select(new DataSourceSelectArguments());

            DataTable dt = data.Table;

            exp.Export(FlatGrid.Model, dt, "Export.xlsx", ExcelVersion.Excel2010, true, true, "flat-lime");

        }

protected void FlatGrid_ServerPdfExporting(object sender, Syncfusion.JavaScript.Web.GridEventArgs e)

        {

            PdfExport exp = new PdfExport();

            DataView data = (DataView)SqlData.Select(new DataSourceSelectArguments());

            DataTable dt = data.Table;

            exp.Export(FlatGrid.Model, dt, "Export.pdf", true, true, "flat-lime");

        }

        protected void FlatGrid_ServerWordExporting(object sender, GridEventArgs e)

        {

            WordExport exp = new WordExport();

            DataView data = (DataView)SqlData.Select(new DataSourceSelectArguments());

            DataTable dt = data.Table;

            exp.Export(FlatGrid.Model, dt, "Export.docx", true, true, "flat-lime");

        }