linq - Dynamic Linq GroupBy Select 无法正常工作

Question

请指导，我可以使用 Dynamic Group by，但是在选择非聚合字段时，我收到以下错误

类型“IGrouping`2”中不存在属性或字段“名称”

var result311 = (IQueryable)gle1.temptable.Where(a => a.IsAllowed == false && a.Code == "r01");

            var result = result311.GroupBy("new (name, FirstAmountOriginal, SecondAccounting)", "it")
                .Select("new (it.name,Sum(FirstAmountOriginal) as FirstAmountOriginalx, Sum(SecondAccounting) as SecondAccountingx)");

请指导

Answer 1

首先，您不应按要聚合的字段进行分组，其次，分组会创建一个Key由您分组的字段组成的分组（在本例中为一个），因此您必须在之后解决此键：

var result = result311.GroupBy("new(name)", "it")
    .Select(@"new (it.Key.name,
                   Sum(FirstAmountOriginal) as FirstAmountOriginalx, 
                   Sum(SecondAccounting) as SecondAccountingx)");