Question

I have List. This list holds integer values only though the data type is string. I want to sort the list based on integer order of the items.

How do I achieve it?

List<string> newZipCodesList = new List<string>();

Answer 1

You can use IComparer Interface to implement your own sort. You will have to create a class which will implement IComparer of T where T in this case would be string.

   newZipCodesList.Sort(new Test());

   public class Test : IComparer<string>
    {
        public int Compare(string x, string y)
        {
            //return 1 when first is greater than second
            if(Convert.ToInt32(x) > Convert.ToInt32(y))
                return 1;
            //return -1 when first is less than second
            else if (Convert.ToInt32(x) < Convert.ToInt32(y))
                return -1;
            //return 0 if they are equal
            else
                return 0;
        }
    }