How to send and receive friend request in social site using

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.Collections;

using System.Web.Security;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Drawing;

using System.IO;

using System.Text;

using System.Net.Mail;

using System.Text.RegularExpressions;

using System.Threading;

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

{

    SqlConnection con = new SqlConnection(@"Data Source=.\sqlexpress;Initial Catalog=MISHRA;Integrated Security=True");

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

          //  GetUserFriendsRequest(int.Parse(Request.QueryString["Id"].ToString()));

            String getUserFriendRequest = this.Request.QueryString["ID"];

        }

    }

    public void GetUserFriendsRequest(int Id)

    {

        SqlCommand cmd = new SqlCommand("Select * FROM [UserTble] where Id IN (SELECT MyId as Id FROM Friends WHERE FriendId='" + Id + "' AND FriendStatus=0)");

        SqlDataReader dt = cmd.ExecuteReader();

        if (dt.Read())

        {

            DataList1.DataSource = dt;

            DataList1.DataBind();

        }

    }

    public string getHREF(object sURL)

    {

        DataRowView dRView = (DataRowView)sURL;

        string Id = dRView["Id"].ToString();

        return ResolveUrl("~/Home.aspx?Id=" + Id);

    }

    public string getSRC(object imgSRC)

    {

        DataRowView dRView = (DataRowView)imgSRC;

        string ImageName = dRView["ImageName"].ToString();

        if (ImageName == "NoImage")

        {

            return ResolveUrl(@"~/images/missing.jpg");

        }

        else

        {

            return ResolveUrl("~/images/" + dRView["ImageName"].ToString());

        }

    }

    protected void FreindRequestList_ItemCommand(object source, DataListCommandEventArgs e)

    {

        if (!object.Equals(Session["UserId"], null))

        {

            if (e.CommandName == "Accept")

            {

                string SenderFriendId =""+Session["ID"];

                string MyID = Session["UserId"].ToString();

                SqlCommand cmd1 = new SqlCommand("Update Friends set FriendStatus=1 where MyId='" + SenderFriendId + "' AND FriendId='" + MyID + "' ");

                SqlDataReader dr = cmd1.ExecuteReader();

               // Response.Redirect("Home.aspx?Id=" + Request.QueryString["Id"].ToString());

                Response.Redirect(String.Format("Home.aspx?ID="+Request.QueryString["ID"].ToString()));

            }

            if (e.CommandName == "Deny")

            {

                string SenderFriendId = "" + Session["ID"];

                string MyID = Session["UserId"].ToString();

                SqlCommand cmd2 = new SqlCommand(" Update Friends set FriendStatus=2 where MyId='" + SenderFriendId + "' AND FriendId='" + MyID + "'");

                SqlDataReader dr2 = cmd2.ExecuteReader();

                

               // Response.Redirect("Home.aspx?Id=" + Request.QueryString["Id"].ToString());

                Response.Redirect(String.Format("Home.aspx?ID=" + Request.QueryString["ID"].ToString()));

            }

        }

 }

}

This code is not working properly.This was not retrive image or other user information.