WZExport/Utilitys/Excel/EnumerableExtension.cs

using System;
using System.Collections.Generic;

namespace Utilty.Unit.Enumerable
{
   public static class EnumerableExtension
    {
        /// <summary>
        /// 根据lambda表达式转换List里的数据
        /// </summary>
        /// <typeparam name="T">泛型类型</typeparam>
        /// <param name="source">List本身</param>
        /// <param name="selector">lambda表达式</param>
        public static IEnumerable<Y> Map<T, Y>(this IEnumerable<T> source, Func<T, Y> selector)
        {
            List<Y> values = new List<Y>();
            foreach (T item in source)
            {
                values.Add(selector(item));
            }
            return values;
        }
        public static void ForEach<T>(this IEnumerable<T> source, Action<T,int> selector)
        {
            int index = -1;
            foreach (T item in source)
            {
                selector(item, ++index);
            }
        }
    }
}