private void cargarComboTipoComparacion(ref Telerik.Web.UI.RadDropDownList r)
 {
     Consulta c = new Consulta();
     try
     {
         DropDownListASP.llenarDropDownList(c.consultarTipoComparacion(), "value", "text", ref r);
         DropDownListASP.AddItemToDropDownList(ref r, "SELECCIONE>>", "-1", true);
         DropDownListASP.selectIndexByValue(ref r, "-1");
     }
     catch (Exception ex)
     {
         Logger.generarLogError(ex.Message, new System.Diagnostics.StackFrame(true), ex);
         this.RadWindowManager1.RadAlert(Utilities.errorMessage(), 400, 200, Utilities.windowTitle(TypeMessage.error_message),
             null, Utilities.pathImageMessage(TypeMessage.error_message));
     }
 }