扩展排序[实现IComparer接口]

 1、实现IComparer接口

    public class Comparer : IComparer<Lims.Model.Pictures>
    {
        public int Compare(Lims.Model.Pictures x, Lims.Model.Pictures y)
        {
            if (x == null)
            {
                if (y == null)
                {
                    return 0;
                }
                else
                {
                    return -1;
                }
            }
            else if (y == null)
            {
                return 1;
            }
            else
            {
                return x.Id.CompareTo(y.Id);
            }
        }
    }

2、实现排序功能

list.Sort(new Comparer()); //实现排序功能