Binding Data to SpGridView using SharePoint Server Side Code and Dotnet Linq

Null checking with Linq Server Side Code
using System;

using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using System.Collections.Generic;
using System.Text;
using System.Linq;
namespace SharePointProject1.SharePointProject1
{
[ToolboxItemAttribute(false)]
public class SharePointProject1 : WebPart
{
protected override void Render(HtmlTextWriter writer)
{
SPList lstSC = SPContext.Current.Web.Lists["SharePoint 2010 Concepts"];
SPListItemCollection myColl = lstSC.Items;
string strTitle = string.Empty;
string strStatus = string.Empty;
if (lstSC.Items.Count> 0)
{
var query = from SPListItem item in lstSC.Items
where item["Status"].ToString().Substring(item["Status"].ToString().LastIndexOf("#") + 1)!="Completed"
orderby item["ID"] descending
select new
{
strTitle=item.Title,
strStatus=item["Status"].ToString().Substring(item["Status"].ToString().LastIndexOf("#") + 1)
};
SPGridView sgvConcepts = new SPGridView();
sgvConcepts.Attributes.Add("RunAt", "Server");
sgvConcepts.AutoGenerateColumns = false;
BoundField bTitle = new BoundField();
bTitle.HeaderText = "Title";
bTitle.DataField = "strTitle";
sgvConcepts.Columns.Add(bTitle);
BoundField bStatus = new BoundField();
bStatus.HeaderText = "Status";
bStatus.DataField = "strStatus";
sgvConcepts.Columns.Add(bStatus);
this.Controls.Add(sgvConcepts);
sgvConcepts.DataSource = query;
sgvConcepts.DataBind();
sgvConcepts.RenderControl(writer);
}
}
protected override void CreateChildControls()
{
}
}
}