c# - 无法在 List<anonymous> LINQ 中应用 Union

Question

我正在尝试将 LINQ 查询的两个结果与我的 DbContext 合并:

var innerJoin = (from pg in context.TbPlageAccueil
                             join pf in context.TbPermanence on pg.IdPlageAccueil equals pf.IdPlage
                             where pf.HeureDebPerm > new DateTime(2016, 10, 1) && pf.HeureFinPerm < new DateTime(2016, 12, 31)
                             select new{ Libelle_Activite = pg.LibellePlageAccueil, Heure_Debut_Activite = pf.HeureDebPerm, Heure_Fin_Activit = pf.HeureFinPerm }).ToList();

var reunion= (from ru in context.TbReunion select new { Libelle_Activite = ru.IntituleReunion, Heure_Debut_Activite = ru.HeureDebRn, Heure_Fin_Activite = ru.HeureFinRn }).ToList();

当我为这两个结果应用 union 时，我得到了这个错误:

CS1929 C# 'List << anonymous type: string Libelle_Activite, DateTime? Activity_Start_Time, DateTime? Time_Fin_Activit >> Queryable.Union << anonymous type: string Libelle_Activite, DateTime? Activity_Start_Time, DateTime? Time_Fin_Activite >> (IQueryable << anonymous type: string Activity_Label, DateTime? Activity_Start_Time, DateTime? Time_Time_Time >>, IEnumerable << type anonymous: string Activity_Label, DateTime? Time_Time_Time >>, IEnumerable << type anonymous: string Activity_Label, DateTime? Time_Time_Activity >>, DateEnime? << anonymous type: string Libelle_Activite, DateTime? Time_Debut_Activite, DateTime? Time_End_Activite

我做错了什么？ 如何解决这个问题？

Answer 1

您在 innerJoin 中定义了一个属性 Heure_Fin_Activit，而在 reunion 中它是 Heure_Fin_Activite。您需要确保它们具有相同的名称和类型:

var reunion= (from ru in context.TbReunion select new 
              { Libelle_Activite = ru.IntituleReunion, 
                Heure_Debut_Activite = ru.HeureDebRn, 
                Heure_Fin_Activit = ru.HeureFinRn }).ToList();