display image in gridview from database

using System;
using System.Collections;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using TestWebMsgApp;
using System.Web.UI.WebControls;
using System.Web.SessionState;

namespace SchoolMgtSys.Hostal.Forms
{
    /// <summary>
    /// Summary description for $codebehindclassname$
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class myhandler : IHttpHandler, IReadOnlySessionState
    {
        //Global object and vriables Declertion
        class_section cs = new class_section();
        prophostalfine obj_prop = new prophostalfine();
        hostalfineclass obj = new hostalfineclass();
        intstudent_hostl prp_hostal = new intstudent_hostl();
        hostalclass obj_hostl = new hostalclass();
        public ClsTimeTable objtime = new ClsTimeTable();
        clsTimetableprp objtimeprp = new clsTimetableprp();

       // public bool IsReusable { get { return true; } }
        public void ProcessRequest(HttpContext context)
        {
            try
            {
                string strId = context.Request.QueryString["st_id"];
                prp_hostal.stid = Convert.ToInt32(strId);
               context.Response.BinaryWrite(obj_hostl.get_read(prp_hostal));
               context.Response.End();
            }
            catch (Exception ew)
            {
                WebMsgBox.Show(ew.Message);
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}