using System.Collections.Generic;
using System.Linq;

namespace System.ComponentModel.DataAnnotations
{
    public class ExcelHeaderAttribute : Attribute
    {
        public ExcelHeaderAttribute(string header, string range="4")
        {
            this.Header = header;
            this.Headers = new Dictionary<string, int>();
            var headers = header.Split(',');
            var ranges = range.Split(',').Select(o => Convert.ToInt32(o)).ToList();
            for (int i = 0; i < headers.Length; i++)
            {
                this.Headers.Add(headers[i], ranges[i]);
            }
        }

        public string Header { get; }
        public Dictionary<string, int> Headers { get; }
    }

}