Question

The background…

Lets say I have a class called cars. We are just going to store the car name and an ID.
Lets also say I have an admin page based on an admin class that I set the total number of cars I want to create in an int called totalCars

The question:
How do I dynamically create cars as fields that can be accessed from anywhere in the code, while at the same time creating a total number of cars based on the number in totalCars?

example code:

      Cars car1 = new Cars();
      int totalCars;
      //Somehow I want to create cars objects/fields based on the 
      //number in the totalCars int
      protected void Page_Load(object sender, EventArgs e)
      {
          car1.Name = "Chevy";
          car1.ID = 1;

      }

      protected void Button1_Click(object sender, EventArgs e)
      {
         TextBox1.Text = car1.Name.ToString();
         //this is just a sample action.
      }

Answer 1

This should de the trick:

int CarCount = 100;
Car[] Cars = Enumerable
            .Range(0, CarCount)
            .Select(i => new Car { Id = i, Name = "Chevy " + i })
            .ToArray();

Regards GJ

Edit

If you just want to know how you would do such a thing (which you shouldn’t), try this:

using System.IO;

namespace ConsoleApplication3 {

    partial class Program {

        static void Main(string[] args) {
            Generate();
        }

        static void Generate() {

            StreamWriter sw = new StreamWriter(@"Program_Generated.cs");
            sw.WriteLine("using ConsoleApplication3;");
            sw.WriteLine("partial class Program {");

            string template = "\tCar car# = new Car() { Id = #, Name = \"Car #\" };";
            for (int i = 1; i <= 100; i++) {
                sw.WriteLine(template.Replace("#", i.ToString()));
            }

            sw.WriteLine("}");
            sw.Flush();
            sw.Close();
        }
    }    

    class Car {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}

Note the keyword partial class, this mean that you can have a class that spans multiple source files. Now you can code one by hand, and generate the other.

If you run this code it will generate this code:

using ConsoleApplication3;
partial class Program {
    Car car1 = new Car() { Id = 1, Name = "Car 1" };
    Car car2 = new Car() { Id = 2, Name = "Car 2" };
    ...
    Car car99 = new Car() { Id = 99, Name = "Car 99" };
    Car car100 = new Car() { Id = 100, Name = "Car 100" };
}

You can the add this code file to your solution (right click project.. add existing..) and compile it. Now you can use these variables car1 .. car100.