protected void BtnBuscar_Click(object sender, EventArgs e)
        {
            if (TXTBuscar.Text.Trim() == string.Empty)
            {
                TXTBuscar.BorderColor = System.Drawing.Color.Red;
                AlertaID.Visible      = true;
                ListarRechazo();
            }
            else
            {
                Controlador.ControladorTareas AuxControladorTarea = new Controlador.ControladorTareas();

                Modelo.RechazoTarea RECHAZO = new Modelo.RechazoTarea();

                RECHAZO = AuxControladorTarea.ObtenerIDRechazoTarea(Convert.ToInt32(TXTBuscar.Text));


                if (RECHAZO.ID_TAREA1 != Convert.ToInt32(TXTBuscar.Text))
                {
                    TXTBuscar.BorderColor    = System.Drawing.Color.Red;
                    AlertaIDNoExiste.Visible = true;
                    AlertaID.Visible         = false;
                    ListarRechazo();
                }
                else
                {
                    TXTBuscar.BorderColor    = System.Drawing.Color.Green;
                    AlertaID.Visible         = false;
                    AlertaIDNoExiste.Visible = false;
                    ListarRechazoConFiltro();
                }
            }
        }