How to convert Image Data type in Sqlserver to original image in ASP.Net

We have Generic handler class in .Net frame work.  Add generic handler class to your project like --> right click on your project -->Add --> Select New Item --> select generic handler class.
For our example name generic handler as Handler1.ashx(generic handler class extension is .ashx)
pass query string Handler1 class .
In this example i am passing query string to handler class in DataList Item template field. see below
My table tblComputers Having 'Uid' column

And this my C# code for DataList to Bind Data

 SqlConnection cn = new SqlConnection("server=.;DataBase=HareeshServices;uid=sa;pwd=roopasoft");
        SqlDataAdapter da;
        SqlCommand cmd;
        DataTable dt;
  public void GetImage()
        {
            dt = new DataTable();
            cmd = new SqlCommand("select * from tblComputers", cn);
            da = new SqlDataAdapter(cmd);
            da.Fill(dt);
            dlComputers.DataSource = dt;
            dlComputers.DataBind();
        }
Now goto Handler1.ashx class Write following Code

  public class Handler1 : IHttpHandler
    {
        SqlConnection cn = new SqlConnection("server=.;DataBase=HareeshServices;uid=sa;pwd=roopasoft");
        SqlCommand cmd;
        //SqlDataReader dr;
        public void ProcessRequest(HttpContext context)
        {
            if (context.Request.QueryString["Uid"] == null) return;
            string Uid= context.Request.QueryString["Uid"];

            cmd = new SqlCommand("select ImageByte from tblComputers where Uid=@Uid", cn);
            cmd.Parameters.Add(new SqlParameter("@Uid",Uid));
            cn.Open();
            //using (SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection))
            //{
         SqlDataReader   dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                dr.Read();
                context.Response.BinaryWrite((Byte[])dr[dr.GetOrdinal("ImageByte")]);
                dr.Close();
            //} 

        }

}

Here Handler1 class fires when we bind data to datasource