<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Display_column_data_into_rows._Default" %>

DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

    <title>Untitled Pagetitle>

head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:GridView ID="GridView1" runat="server">

        asp:GridView>

    div>

    form>

body>

html>

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Data.SqlClient;

namespace Display_column_data_into_rows

{

    public partial class _Default : System.Web.UI.Page

    {

        string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

        SqlCommand com;

        string str;

        DataSet ds;

        SqlDataAdapter sqlda;

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                bindgrid();

            }

        }

        void bindgrid()

        {

            SqlConnection con = new SqlConnection(connStr);

            con.Open();

            str = "select Series,Substring((select(', '+ Items) from t1 t where t1.Series= t.Series order by Series,Items for xml path('')),3,1000)from t1 group by Series";

            com = new SqlCommand(str, con);

            sqlda = new SqlDataAdapter(com);

            ds = new DataSet();

            sqlda.Fill(ds, "t1");

            GridView1.DataSource = ds;

            GridView1.DataMember = "t1";

            GridView1.DataBind();

            con.Close();

        }

    }

}

Thanks