How to Retrieve SharePoint Quick Launch Links to GridView or SpGridView using Server Side Linq

Ascx

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %> <%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %> <%@ Import Namespace="Microsoft.SharePoint" %> <%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="QuickLaunchProgramUserControl.ascx.cs" Inherits="QuickLaunchProgram.QuickLaunchProgram.QuickLaunchProgramUserControl" %> <asp:GridView ID="dgvQuickLaunch" runat="server" AutoGenerateColumns="False"     Width="100%" CellPadding="4" EnableModelValidation="True" ForeColor="#333333"     GridLines="None" onrowdatabound="dgvQuickLaunch_RowDataBound">     <AlternatingRowStyle BackColor="White" /> <Columns> <asp:TemplateField HeaderText="QuickLaunch Links"> <ItemTemplate> <div> <a href=<%# Eval("QuickLaunchMainHeadingURL") %>><%# Eval("QuickLaunchMainHeadingTitle")%></a> <asp:Label ID="lblMainHeading" runat="server" Visible="false" Text=<%# Eval("QuickLaunchMainHeadingTitle")%>></asp:Label> </div> <div style="padding-left:20px;"> <asp:GridView ID="dgvQuickLaunchChildren" runat="server"     AutoGenerateColumns="False" CellPadding="4" EnableModelValidation="True"     ForeColor="#333333" GridLines="Both" Width="100%">     <AlternatingRowStyle BackColor="White" />     <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />     <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />     <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />     <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />     <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" /> </asp:GridView> </div> </ItemTemplate> </asp:TemplateField> </Columns>     <EditRowStyle BackColor="#7C6F57" />     <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />     <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />     <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />     <RowStyle BackColor="#E3EAEB" />     <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" /> </asp:GridView>

Ascx.Cs

using System; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using Microsoft.SharePoint; using System.Security; using System.Linq; using Microsoft.SharePoint.Navigation; namespace QuickLaunchProgram.QuickLaunchProgram {     public partial class QuickLaunchProgramUserControl : UserControl     {         protected void Page_Load(object sender, EventArgs e)         {             if (!IsPostBack)             {                 getQuickLaunchLinks();             }         }         public void getQuickLaunchLinks()         {             SPSecurity.RunWithElevatedPrivileges(delegate()             {                 string QuickLaunchMainHeadingTitle = string.Empty;                 string QuickLaunchMainHeadingURL = string.Empty;                 var strQuery = from SPNavigationNode node in SPContext.Current.Web.Navigation.QuickLaunch                                select new { QuickLaunchMainHeadingTitle = node.Title, QuickLaunchMainHeadingURL = node.Url };                 dgvQuickLaunch.DataSource = strQuery;                 dgvQuickLaunch.DataBind();             });         }         protected void dgvQuickLaunch_RowDataBound(object sender, GridViewRowEventArgs e)         {             if (e.Row.RowType == DataControlRowType.DataRow)             {                 Label lbl = (Label)e.Row.Cells[0].FindControl("lblMainHeading");                 GridView dgvQuickLaunchChildren1 = (GridView)e.Row.Cells[0].FindControl("dgvQuickLaunchChildren");                 HyperLinkField bTitle = new HyperLinkField();                 //bTitle.HeaderText = "";                 bTitle.DataTextField = "QuickLaunchChildHeadingTitle";                 bTitle.DataNavigateUrlFields = new String[] { "QuickLaunchChildHeadingURL" };                 bTitle.DataNavigateUrlFormatString = "{0}";                 dgvQuickLaunchChildren1.Columns.Add(bTitle);                 SPSecurity.RunWithElevatedPrivileges(delegate()                 {                     string QuickLaunchChildHeadingTitle = string.Empty;                     string QuickLaunchMainHeadingURL = string.Empty;                     var strChildItemsQuery = from SPNavigationNode heading in SPContext.Current.Web.Navigation.QuickLaunch                                         from SPNavigationNode child in heading.Children                                         where heading.Title == lbl.Text                                         select new { QuickLaunchChildHeadingTitle = child.Title, QuickLaunchChildHeadingURL = child.Url };                     dgvQuickLaunchChildren1.DataSource = strChildItemsQuery;                     dgvQuickLaunchChildren1.DataBind();                 });                                          }         }     } }