MVC5 结合 db .Include 和 OrderBy

Question

在我的控制器中，我像这样添加了 Balances 和 RZiS

Analysis1Full analysis1Full = db.Analysis1Full
                                .Include(u => u.Balance)
                                .Include(r => r.RZiS)
                                .SingleOrDefault(u => u.Analysis1FullId == id);
//enter code here

它给了我正确的对象。关键是我想按字符串字段（年）对余额进行排序。但它给了我一个错误：

Analysis1Full analysis1Full = db.Analysis1Full
                                .Include(u => u.Balance.OrderBy(y => y.Year))
                                .Include(r => r.RZiS)
                                .SingleOrDefault(i => i.Analysis1FullId == id);

错误：

An exception of type 'System.ArgumentException' occurred in EntityFramework.dll but was not handled in user code

Additional information: The Include path expression must refer to a navigation property defined on the type. Use dotted paths for reference navigation properties and the Select operator for collection navigation properties.

Answer 1

之所以会抛出异常，无非是因为它就是这么设计的。根据MSDN，Include()仅指定要包含在查询结果中的相关对象。

要让子项按顺序排列，您可以在访问它们时添加 OrderBy()，否则您需要在不同的查询中加载它们。

Answer 2

我是这样解决的...它正在工作

Analysis1Full analysis1Full = db.Analysis1Full.Find(id);

        analysis1Full.Balance = db.Balances.Where(t=>t.Analysis1FullId == analysis1Full.Analysis1FullId).OrderBy(y=>y.Year).ToList();
        analysis1Full.RZiS = db.RZiS.Where(t => t.Analysis1FullId == analysis1Full.Analysis1FullId).OrderBy(y => y.Year).ToList();

您认为这是个好方法吗？

MVC5 结合 db .Include 和 OrderBy

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