private void txtBuscarSup_KeyUp(object sender, KeyEventArgs e)
 {
     Clases.C_Supervisor sup = new Clases.C_Supervisor();
     dtgrdsup.ItemsSource = null;
     if (sup.BuscarSupervisores(txtBuscarSup.Text).Count > 0)
     {
         dtgrdsup.ItemsSource = sup.BuscarSupervisores(txtBuscarSup.Text);
     }
 }
        //----------- TextBox Supervisor ----------------------------//
        private void txtBuscarSup_KeyUp(object sender, KeyEventArgs e)
        {
            Clases.C_Supervisor        sup = new Clases.C_Supervisor();
            List <Clases.C_Supervisor> aux = new List <Clases.C_Supervisor>();

            dtgrdsup.ItemsSource = null;
            if (txtBuscarSup.Text != "")
            {
                aux = sup.BuscarSupervisores(txtBuscarSup.Text);
                if (aux.Count > 0)
                {
                    dtgrdsup.ItemsSource = aux;
                }
            }
        }