public Compra(int id, int acidez, float pres, int cant)
{
d = new Disolvente(acidez, pres);
clave = Conexion.getUltimaCompra() + 1;
idCliente = id;
cantidad = cant;
totalC = d.calcularPrecio(cantidad);
}
private void btCalcular_Click(object sender, RoutedEventArgs e)
{
float present = Conexion.getPresentacion(cbAcidez.SelectedIndex);
MessageBox.Show("" + present);
Disolvente d = new Disolvente(cbAcidez.SelectedIndex + 1, present);
int cantidad = Int16.Parse(txtCantidad.Text);
int total = d.calcularPrecio(cantidad);
if (total > 0)
{
txtTotal.Text = total + ".0 $";
}
else
{
MessageBox.Show("error ");
}
}