<telerik:RadAjaxPanel runat="server" ID="panel" LoadingPanelID="RadAjaxLoadingPanel1" RenderMode="Inline" EnableAJAX="true">
    <div class="row">
        <asp:Button runat="server" ID="btnLoad" Text="Load Data" OnClick="btnLoad_Click" />
    </div>

    <telerik:RadGrid runat="server" ID="radGrid" CssClass="radgrid" Skin="Bootstrap"
        ClientSettings-Scrolling-AllowScroll="true"
        ClientSettings-Scrolling-ScrollHeight="800"
        ClientSettings-Scrolling-UseStaticHeaders="true"
        ClientSettings-EnableAlternatingItems="false"
        HeaderStyle-Wrap="false" AllowPaging="true" PageSize="50"
        ItemStyle-Wrap="false" AllowSorting="true"
        OnNeedDataSource="radGrid_NeedDataSource" AllowMultiRowSelection="false"
        HeaderStyle-BackColor="White">
        <ClientSettings>
            <Selecting AllowRowSelect="true" />

        </ClientSettings>
        <MasterTableView>
            <Columns>
                <telerik:GridTemplateColumn UniqueName="colEdit" AllowFiltering="false" Exportable="false">
                    <ItemTemplate>
                        <asp:LinkButton CssClass="link-button" runat="server" ID="btnEdit">Edit</asp:LinkButton>
                    </ItemTemplate>
                </telerik:GridTemplateColumn>
                <telerik:GridTemplateColumn UniqueName="colDelete" AllowFiltering="false" Exportable="false">
                    <ItemTemplate>
                        <asp:LinkButton CssClass="link-button" ID="btnDelete" runat="server">Delete</asp:LinkButton>
                    </ItemTemplate>
                </telerik:GridTemplateColumn>
            </Columns>
        </MasterTableView>
    </telerik:RadGrid>

</telerik:RadAjaxPanel>

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        radGrid.Visible = false;
    }
}

protected void btnLoad_Click(object sender, EventArgs e)
{
    radGrid.Visible = true;
    radGrid.Rebind();
}
protected void radGrid_NeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    var grid = sender as RadGrid;
    grid.DataSource = LoadData();
}
private DataTable LoadData()
{
    DataTable tbl = new DataTable();
    tbl.Columns.Add(new DataColumn("ADFAFD", typeof(string)));
    tbl.Columns.Add(new DataColumn("ADFADFADF", typeof(string)));
    tbl.Columns.Add(new DataColumn("ADFADFADFADFASDF", typeof(string)));
    tbl.Columns.Add(new DataColumn("HGDH", typeof(string)));
    tbl.Columns.Add(new DataColumn("ADFADF ADFADFADF", typeof(string)));
    tbl.Columns.Add(new DataColumn("ADF ADSFADF", typeof(string)));
    tbl.Columns.Add(new DataColumn("FKHDGJHFGJH", typeof(string)));
    tbl.Columns.Add(new DataColumn("SHFSFHSGH", typeof(string)));
    tbl.Columns.Add(new DataColumn("ADF ASDFASDF ASDFADSF", typeof(string)));
    tbl.Rows.Add(new object[] { "ADFADF", "ASDFADFAFD", "ADFADF", "ADFADFADF ADFADFADFADF ADFADF ADFADFADF ADFADFADFADF ADFADF", "ADFADF", "ASDFADFAFD", "ADFADF", "ADFADFADF ADFADFADFADF ADFADF"});
    tbl.Rows.Add(new object[] { "ADFADF", "ASDFADFAFD", "ADFADF", "ADFADFADF ADFADFADFADF ADFADF", "ADFADF", "ASDFADFAFD", "ADFADF", "ADFADFADF ADFADFADFADF ADFADF"});
    return tbl;
}