How to use nested repeater in c# when header part multiple

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

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

{

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConCPWD"].ConnectionString);

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

BindRepeaterData();

BindRepeaterData1();

BindRepeaterData2();

BindRepeaterData4();

BindRepeaterData5();

BindRepeaterData6();

BindRepeaterData7();

BindRepeaterData8();

BindRepeaterData9();

BindRepeaterData10();

}

}

protected void BindRepeaterData()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Manuals' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

RepDetails.DataSource = ds;

RepDetails.DataBind();

con.Close();

}

protected void BindRepeaterData1()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Government Condition of Contract' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

RepDetails1.DataSource = ds;

RepDetails1.DataBind();

con.Close();

}

protected void BindRepeaterData2()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Area ' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater2.DataSource = ds;

Repeater2.DataBind();

con.Close();

}

protected void BindRepeaterData3()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Analysis Delhi' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater2.DataSource = ds;

Repeater3.DataBind();

con.Close();

}

protected void BindRepeaterData4()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Schedules of Rates (Electrical)' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater4.DataSource = ds;

Repeater4.DataBind();

con.Close();

}

protected void BindRepeaterData5()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Design Pattrn' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater5.DataSource = ds;

Repeater5.DataBind();

con.Close();

}

protected void BindRepeaterData6()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Schedules Other' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater6.DataSource = ds;

Repeater6.DataBind();

con.Close();

}

protected void BindRepeaterData7()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Specifications' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater7.DataSource = ds;

Repeater7.DataBind();

con.Close();

}

protected void BindRepeaterData8()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Specifications' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater8.DataSource = ds;

Repeater8.DataBind();

con.Close();

}

protected void BindRepeaterData9()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Schedule ' Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater9.DataSource = ds;

Repeater9.DataBind();

con.Close();

}

protected void BindRepeaterData10()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD where category='Government Condition  By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

Repeater10.DataSource = ds;

Repeater10.DataBind();

con.Close();

}/*

protected void BindRepeaterData11()

{

con.Open();

SqlCommand cmd = new SqlCommand("select * from ADD_Publication where category='Other  Order By PublicationYear desc", con);

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(cmd);

da.Fill(ds);

RepDetails11.DataSource = ds;

RepDetails11.DataBind();

con.Close();

}*/

}