Question

我有这个C＃类

 public class EntryClass
    {
        public string Field { get; set; }
        public List<FieldKeyValuePair<string, string>> FieldKeyValPairs { get; set; }

        public bool Equals(EntryClass other)
        {
            return Field.Equals(other.Field)
                && FieldKeyValPairs.Equals(other.FieldKeyValPairs);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != this.GetType()) return false;
            return Equals((EntryClass)obj);

        }
    }

    public class FieldKeyValuePair<K, V>
    {
        public K Key { get; set; }
        public V Value { get; set; }

        public bool Equals(FieldKeyValuePair<K, V> other)
        {
            return Key.Equals(other.Key)
                && Value.Equals(other.Value);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != this.GetType()) return false;
            return Equals((FieldKeyValuePair<K, V>)obj);
        }

    }

尝试做Assert.IsTrue(expected.SequenceEqual(actual));总是给我假，我看到即使预期和实际有相同的FieldKeyValPairs，这个表达总是会遇到假&& FieldKeyValPairs.Equals(other.FieldKeyValPairs);

修改预期和实际属于

类型

 List<EntryClass> expected = new List<EntryClass>(); // TODO: 
         List<EntryClass> actual = new List<EntryClass>();

Answer 1

可能你忘了重写GetHashCode（）。一些比较算法首先比较哈希码以加速计算。

有关详细信息，请参阅此答案： Why is it important to override GetHashCode when Equals method is overridden?

Answer 2

我不得不改变返回Field.Equals（other.Field）＆安培;＆安培; FieldKeyValPairs.Equals（other.FieldKeyValPairs）;

要

      return Field.Equals(other.Field)
            && FieldKeyValPairs.SequenceEqual(other.FieldKeyValPairs);

嵌套列表比较等于

2 个答案: