private void CalculateButton_OnClick(object sender, RoutedEventArgs e)
{
double fuel, distance;
if (!double.TryParse(_viewModel.Fuel, out fuel) || !double.TryParse(_viewModel.Distance, out distance))
{
return;
}
FuelEconomyType ecoType = _viewModel.SelectedFuelEcoType;
double result = 0;
switch (ecoType.Id)
{
case "lpk":
if (Math.Abs(distance) > double.Epsilon)
{
result = fuel / (distance / 100);
}
break;
case "mpg":
if (Math.Abs(fuel) > double.Epsilon)
{
result = distance / fuel;
}
break;
}
_viewModel.Result = result.ToString("F");
}
private void InitializeFullEcoTypes()
{
var firstEconomyType = new FuelEconomyType
{
Id = "lpk",
Text = "L/100 km",
DistanceText = "Distance (kilometers)",
FuelText = "Fuel used (liters)"
};
var secondEconomyType = new FuelEconomyType
{
Id = "mpg",
Text = "Miles per gallon",
DistanceText = "Distance (miles)",
FuelText = "Fuel used (gallons)"
};
FuelEcoTypes = new List <FuelEconomyType>
{
firstEconomyType,
secondEconomyType
};
}