c#List结合IEqualityComparer求交集

Posted 2020-06-21 雨文100

 

List元素类：

    public class MultiPointSearchingRet
    {
        public int ID { get; set; }
        public string PlateNumber { get; set; }
        public int VehicleBrand1 { get; set; }
        public string BrandName { get; set; }
      }

实现了IEqualityComparer的比较类：

    public class MultiPointSearchingRetComparer : IEqualityComparer<MultiPointSearchingRet>
    {
        public bool Equals(MultiPointSearchingRet x, MultiPointSearchingRet y)
        {
            return x.PlateNumber == y.PlateNumber && x.VehicleBrand1 == y.VehicleBrand1;
        }

        public int GetHashCode(MultiPointSearchingRet obj)
        {
            return obj.ID.GetHashCode();
        }
    }

调用：

            List<MultiPointSearchingRet>[] tmpLst = new List<MultiPointSearchingRet>[10];
            List<MultiPointSearchingRet> retLst = new List<MultiPointSearchingRet>();
            //略
            for (int i = 0; i < length; i++)
            {
                if (i == 0)
                    retLst = tmpLst[i];
                else
                    retLst = retLst.Intersect(tmpLst[i], new MultiPointSearchingRetComparer()).ToList();
            }