//Get method that will pull in the current inventory from the CSV file
private static void GetCurrentInventory()
{
//first point the StreamReader object at the text file that holds the current inventory in CSV format
StreamReader sr = new StreamReader(@"C:\Users\ShaKy\Source\Repos\CarLotCOMPLETE\CarLot\CarLotDB.txt");
//string array to hold the split CSV row before parsing into necessary Car object
string[] csvArray;
//string that grabs and holds the first line of the CSV text file
string line = sr.ReadLine();
//while loop to iterate through the text file of CSV's building inventory List
while (line != null)//as long as the first line of the text file is not null then continue with parsing
{
//spilt the CSV on the comma's until we have the sparate values indexed in our string array
csvArray = line.Split(',');
//check to see what type of Car object is in each CSV
if (csvArray[0] == "1")//if it starts with a number 1 then it will be a NewCar object
{
//we add a NewCar object passing a CSV string in to our method which returns a new object
currentInventory.Add(NewCar.CSVToCar(line));
}
else
{
//we add a UsedCar object passing a CSV string in to our method which returns a new object
currentInventory.Add(UsedCar.CSVToCar(line));
}
//we advance the CSV text file to the next row of data
line = sr.ReadLine();
}
//close the text file when done with File I/O operations
sr.Close();
}
//method to Save/Update the current inventory
private static void SaveCurrentInventory()
{
//create new streamwriter object
StreamWriter sw = new StreamWriter(@"..\CarLotCOMPLETE\CarLot\CarLotDB.txt");
//iterate through our list of cars and first make CSV string out of the objects data, and then write that data to the CSV text file
foreach (Car car in currentInventory)
{
//check if the object is a NewCar or a UsedCar
if (car is NewCar)
{
//if its a NewCar then we call the method that is in the NewCar class
sw.WriteLine(NewCar.CarToCSV((NewCar)car));
}
else
{
//if it is a UsedCar then we call then methiod that is in the UsedCar class
sw.WriteLine(UsedCar.CarToCSV((UsedCar)car));
}
}
//closed the connection saving data to the text file
sw.Close();
}
/// <summary>
/// return string in CSV format
/// </summary>
/// <param name="car"></param>
public static string CarToCSV(UsedCar car)
{
//added a number 2 to the string to indicate a UsedCar object
return($"{2},{car.Make},{car.Model},{car.Year},{car.Mileage}");
}