c# - LINQ 返回数组，而不是列表对象的集合

Question

我希望 Linq 返回一个数组。为了绘制图形。

这是我的代码

var orders = _uow.Orders.GetAll()
            .Where(x => x.Created > baselineDate)
            .GroupBy(x => x.Created.Day)
            .Select(c => new {Day = c.Key, Total = c.Sum(t => t.Total)})
            .ToList();

现在它返回这个

[{"Day":3,"Total":9999.00},{"Day":4,"Total":9999.00},{"Day":5,"Total":9999.00}]

但是我想要一个结果

{"Day":[3,4,5], "Total":[9999, 9999, 9999]}

这个结果更容易绘制图形。

谢谢大家

Answer 1

var groups = _uow.Orders.GetAll()
            .Where(x => x.Created > baselineDate)
            .GroupBy(x => x.Created.Day);

var orders = new {
    Day = groups.Select(g => g.Key).ToArray(),
    Total = groups.Select(g => g.Sum(t => t.Toal)).ToArray()
};