在LINQ中使用求和方法

lakedoo 发表于 Dev

莱克杜

我正在尝试汇总通用集合中的值，我在其他代码中使用了完全相同的代码来执行此功能，但是ulong数据类型似乎有问题？

代码

   Items.Sum(e => e.Value);

有以下错误：

错误15下列方法或属性之间的调用不明确：' System.Linq.Enumerable.Sum<System.Collections.Generic.KeyValuePair<int,ulong>>(System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<int,ulong>>, System.Func<System.Collections.Generic.KeyValuePair<int,ulong>,float>)'和' System.Linq.Enumerable.Sum<System.Collections.Generic.KeyValuePair<int,ulong>>(System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<int,ulong>>, System.Func<System.Collections.Generic.KeyValuePair<int,ulong>,decimal?>）

public class Teststuff : BaseContainer<int, ulong, ulong>
{
    public decimal CurrentTotal { get { return Items.Sum(e => e.Value); } }

    public override void Add(ulong item, int amount = 1)
    {
    }

    public override void Remove(ulong item, int amount = 1)
    {
    }
}

public abstract class BaseContainer<T, K, P>
{
    /// <summary>
    /// Pass in the owner of this container.
    /// </summary>
    public BaseContainer()
    {
        Items = new Dictionary<T, K>();
    }

    public BaseContainer()
    {
        Items = new Dictionary<T, K>();
    }

    public Dictionary<T, K> Items { get; private set; }
    public abstract void Add(P item, int amount = 1);
    public abstract void Remove(P item, int amount = 1);
}