How to create custom paging in Repeater control?

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;

public partial class _Default : System.Web.UI.Page
{
    PagedDataSource pgsource = new PagedDataSource();
    int findex, lindex;
    DataRow dr;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            //During first time page load this method call
            if (!Page.IsPostBack)
            {
                BindDataList();
                LoadDDL();
            }
        }
    }

    DataTable GetData()
    {
        DataTable dtable = new DataTable();
        //Create column names for Datatable "dtable" 
        dtable.Columns.Add("eno");
        dtable.Columns.Add("empname");
        dtable.Columns.Add("dept");
        for (int i = 1; i <= 100; i++)
        {
            //Create rows for DataTable "dtable" and assign values for each column
            dr = dtable.NewRow();
            dr["eno"] = i;
            dr["empname"] = "Empname " + i;
            dr["dept"] = "Dept. Name ";
            dtable.Rows.Add(dr);
        }
        //Return DataTable "dtable" with its data
        return dtable;
    }

    private void BindDataList()
    {
        //Create new DataTable dt
        DataTable dt = GetData();
        pgsource.DataSource = dt.DefaultView;

        //Set PageDataSource paging 
        pgsource.AllowPaging = true;

        //Set number of items to be displayed in the Repeater using drop down list
        if (ddlIndex.SelectedIndex == -1 || ddlIndex.SelectedIndex == 0)
        {
            pgsource.PageSize = 10;
        }
        else
        {
            pgsource.PageSize = Convert.ToInt32(ddlIndex.SelectedItem.Value);
        }
        
        //Get Current Page Index
        pgsource.CurrentPageIndex = CurrentPage;

        //Store it Total pages value in View state
        ViewState["totpage"] = pgsource.PageCount;

        //Below line is used to show page number based on selection like "Page 1 of 20"
        lblpage.Text = "Page " + (CurrentPage + 1) + " of " + pgsource.PageCount;

        //Enabled true Link button previous when current page is not equal first page 
        //Enabled false Link button previous when current page is first page
        lnkPrevious.Enabled  = !pgsource.IsFirstPage;

        //Enabled true Link button Next when current page is not equal last page 
        //Enabled false Link button Next when current page is last page
        lnkNext.Enabled = !pgsource.IsLastPage;

        //Enabled true Link button First when current page is not equal first page 
        //Enabled false Link button First when current page is first page
        lnkFirst.Enabled = !pgsource.IsFirstPage;

        //Enabled true Link button Last when current page is not equal last page 
        //Enabled false Link button Last when current page is last page
        lnkLast.Enabled = !pgsource.IsLastPage;

        //Bind resulted PageSource into the Repeater
        Repeater1.DataSource = pgsource;
        Repeater1.DataBind();

        //Create Paging with help of DataList control "RepeaterPaging"
        doPaging();
        RepeaterPaging.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
    }

    private void doPaging()
    {
        DataTable dt = new DataTable();
        //Add two column into the DataTable "dt" 
        //First Column store page index default it start from "0"
        //Second Column store page index default it start from "1"
        dt.Columns.Add("PageIndex");
        dt.Columns.Add("PageText");

        //Assign First Index starts from which number in paging data list
        findex = CurrentPage - 5;

        //Set Last index value if current page less than 5 then last index added "5" values to the Current page else it set "10" for last page number
        if (CurrentPage > 5)
        {
            lindex = CurrentPage + 5;
        }
        else
        {
            lindex = 10;
        }

        //Check last page is greater than total page then reduced it to total no. of page is last index
        if (lindex > Convert.ToInt32(ViewState["totpage"]))
        {
            lindex = Convert.ToInt32(ViewState["totpage"]);
            findex = lindex - 10;
        }

        if (findex < 0)
        {
            findex = 0;
        }

        //Now creating page number based on above first and last page index
        for (int i = findex; i < lindex; i++)
        {
            DataRow dr = dt.NewRow();
            dr[0] = i;
            dr[1] = i + 1;
            dt.Rows.Add(dr);
        }

        //Finally bind it page numbers in to the Paging DataList "RepeaterPaging"
        RepeaterPaging.DataSource = dt;
        RepeaterPaging.DataBind();
    }

    private int CurrentPage
    {
        get
        {   //Check view state is null if null then return current index value as "0" else return specific page viewstate value
            if (ViewState["CurrentPage"] == null)
            {
                return 0;
            }
            else
            {
                return ((int)ViewState["CurrentPage"]);
            }
        }
        set
        {
            //Set View statevalue when page is changed through Paging "RepeaterPaging" DataList
            ViewState["CurrentPage"] = value;
        }
    }

    protected void RepeaterPaging_ItemCommand(object source, DataListCommandEventArgs e)
    {
        if (e.CommandName.Equals("newpage"))
        {
            //Assign CurrentPage number when user click on the page number in the Paging "RepeaterPaging" DataList
            CurrentPage = Convert.ToInt32(e.CommandArgument.ToString());
            //Refresh "Repeater1" control Data once user change page
            BindDataList();
        }
    }

    protected void lnkFirst_Click(object sender, EventArgs e)
    {
        //If user click First Link button assign current index as Zero "0" then refresh "Repeater1" Data.
        CurrentPage = 0;
        BindDataList();
    }

    protected void lnkLast_Click(object sender, EventArgs e)
    {
        //If user click Last Link button assign current index as totalpage then refresh "Repeater1" Data.
        CurrentPage = (Convert.ToInt32(ViewState["totpage"]) - 1);
        BindDataList();
    }

    protected void lnkPrevious_Click(object sender, EventArgs e)
    {
        //If user click Previous Link button assign current index as -1 it reduce existing page index.
        CurrentPage -= 1;
        //refresh "Repeater1" Data
        BindDataList();
    }

    protected void lnkNext_Click(object sender, EventArgs e)
    {
        //If user click Next Link button assign current index as +1 it add one value to existing page index.
        CurrentPage += 1;

        //refresh "Repeater1" Data
        BindDataList();
    }

    void LoadDDL()
    {
        //Below code is used to bind values in the drop down list
        for (int i = 1; i <= 10; i++)
        {
            ddlIndex.Items.Add(i.ToString());
        }
        ddlIndex.Items.Insert(0, new ListItem("--Select--", "--Select--"));
    }

    protected void ddlIndex_SelectedIndexChanged(object sender, EventArgs e)
    {
        //Set Default current index Zero default and refresh it page size based on Drop Down List selected
        CurrentPage = 0;
        BindDataList();
    }

    protected void RepeaterPaging_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        //Enabled False for current selected Page index
        LinkButton lnkPage = (LinkButton)e.Item.FindControl("Pagingbtn");
        if (lnkPage.CommandArgument.ToString() == CurrentPage.ToString())
        {
            lnkPage.Enabled = false;
            lnkPage.BackColor = System.Drawing.Color.FromName("#970915");            
        }
    }
}