public void ProcessRequest(HttpContext context)
    {

        SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["cnVer"].ConnectionString);

        try
        {
            if (context.Request["ref"] != null)
            {
                SqlCommand cmd = new SqlCommand("Estado_Referencia01", cn);
                cmd.CommandType = CommandType.StoredProcedure;

                SqlDataReader lector;

                cmd.Parameters.AddWithValue("@referencia", context.Request["ref"]);

                cn.Open();
                lector = cmd.ExecuteReader();
                String[] fechas = new String[8];
                while (lector.Read())
                {
                    fechas[0] = lector["creacion"].ToString();
                    fechas[1] = lector["revalidacion"].ToString();
                    fechas[2] = lector["previo"].ToString();
                    fechas[3] = lector["fe.entrada"].ToString();
                    fechas[4] = lector["fe.pago"].ToString();
                    fechas[5] = lector["despacho"].ToString();
                    fechas[6] = lector["cta.gtos"].ToString();
                    fechas[7] = lector["liquidacion"].ToString();
                }

                Image bm = new Bitmap(900, 50);
                Image[] a0 = new Bitmap[8];
                Graphics objGraphics = Graphics.FromImage(bm);
                int padding = 82;
                for (int i = 0; i < 8; i++)
                {

                    if (fechas[i] == "")
                        a0[i] = new Bitmap(context.Server.MapPath("~") + "images\imagenesEdoReferencia\g" + i + ".png");
                    else
                        a0[i] = new Bitmap(context.Server.MapPath("~") + "images\imagenesEdoReferencia\c" + i + ".png");

                    objGraphics.DrawImage(a0[i], new Point(padding * i, 0));
                }



                string ruta = Path.GetTempPath() + context.Request["ref"] + ".png";
                bm.Save(ruta);

                context.Response.Clear();
                context.Response.ContentType = "image/png";
                context.Response.WriteFile(ruta);
                //context.Response.Close();
            }
        }
        catch (Exception ex)
        {

        }
        finally
        {
            cn.Close();
        }
    }

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