LINQ Distinct 自定义

 

 

1、定义对象

        public class BusinessObj
        {
            public string OtherData;
            public int Key;
        }

 

2、自定义比较符

        public class BusinessObjComparer : IEqualityComparer<BusinessObj>
        {
            public bool Equals(BusinessObj source, BusinessObj dest)
            {
                return source.Key == dest.Key;
            }

            public int GetHashCode(BusinessObj obj)
            {
                return obj.Key.GetHashCode();
            }
        }

 

 

 

3、使用

List<BusinessObj> curBusinessObjList = 

curBusinessObjList.FindAll((BusinessObj curBusinessObj) => (curBusinessObj.Key != 1)).Distinct(new BusinessObjComparer()).ToList();