Need logic for 1 to many and many to 1?

Question

User-851246726 posted

I have categories and each category has 5 max of sub-categories.
So, when I create a new category, I want it to be in constructor.

What's the best way to create the logic for code?

I need ideas on how to deal with this in best possible manner.

Answer 1

User527778624 posted

Hi,

o, when I create a new category, I want it to be in constructor.

what you mean by that, anyway check below code:

public class Category
{
   public string Name{get; set;}
   public List<SubCategory> SubCategories{get; set;}
}
public class SubCategory
{
   public string Name{get; set;}
}

Answer 2

User1559292362 posted

Hi jeffcarter,

jeffcarter

So, when I create a new category, I want it to be in constructor.

What's the best way to create the logic for code?

According to your description, each category has 5 max of sub-categories, do you mean that if a category has 5 sub-categories, which couldn’t add a new category? And you want to create a new category in constructor? If so, you need to know the parent category before you create a new category, then you could create an object named category, which has a constructor with two parameters like this:

public class Categroy
    {
        public Categroy() { }

        public Categroy(int parentId, string categroyName)
        {
            int count = SubCount(parentId);
            if (count < 5)
            {
               //create a new Categroy here
                Console.WriteLine("{0} -- {1}", categroyName, count);
            }
            else
            {
                throw new Exception("error message");
            }
        }

        public int CategroyID { get; set; }
        public string CategroyName { get; set; }
        public int SubCount(int parentId)
        {
            // you need retrieve the count by using parentId
            return 5;
        }
    }

 

Best regards,

Cole Wu