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实例集合:获取资金的平均
List<Product> list = new List<Product>();
list.Add(new Product { Id = 1, Good = 50, Total = 50 });
list.Add(new Product { Id = 2, Good = 18, Total = 30 });
list.Add(new Product { Id = 2, Good = 15, Total = 30 });
list.Add(new Product { Id = 1, Good = 40, Total = 50 });
list.Add(new Product { Id = 3, Good = 6, Total = 10 });
list.Add(new Product { Id = 1, Good = 45, Total = 50 });
list.Add(new Product { Id = 3, Good = 8, Total = 10 });
产品数量是未知的。我需要的结果是获得每个不同产品的百分比/总数,然后获得所有产品的平均值。在这种情况下:
Product Id=1, GoodSum = 50 + 40 + 45 = 135, TotalSum = 50 + 50 + 50 = 150, Perc = 135/150
Product Id=2, GoodSum = 18 + 15 = 33, TotalSum = 30 + 30 = 60, Perc = 33/60
Product Id=3, GoodSum = 6 + 8 = 14, TotalSum = 10 + 10 = 20, Perc = 14/20
Avg = Avg(135/150 + 35/60 + 14/20) = Avg(0.9 + 0.55 + 0.7) = 2.15/3 = 7.17
我们能做到这一点使用LINQ,我只对LINQ的解决方案感兴趣。