.net中自帶的比較器Compare是值型別比較,要想比較物件,即引用型別.我們需要重寫比較器.

新建RefComparer.cs類

建立一個委託,用於傳入需要比較的物件

public delegate bool EqualsComparer<T>(T x, T y);

然後重寫Equals和GetHashCode方法即可

具體程式碼如下

public delegate bool EqualsComparer<T>(T x, T y);
    /// <summary>
    /// 引用型別比較器
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class RefComparer<T> : IEqualityComparer<T>
    {
        private EqualsComparer<T> comparer;
        public RefComparer(EqualsComparer<T> equalsComparer)
        {
            this.comparer = equalsComparer;
        }
        public bool Equals(T x, T y)
        {
            if (this.comparer != null)
                return this.comparer(x, y);
            else
                return false;
        }
        public int GetHashCode(T obj)
        {
            return obj.ToString().GetHashCode();
        }
    }