Question

我正在MVC4中创建一个应用程序。我的模型如下：

public class NonComplianceData
{
   public static List<MonthDefinitions> Months = new List<MonthDefinitions>()
   {
      new MonthDefinitions {Month = "January", Order = 1},
      new MonthDefinitions {Month = "February", Order = 2},
      new MonthDefinitions {Month = "March", Order = 3},
      new MonthDefinitions {Month = "April", Order = 4},
      new MonthDefinitions {Month = "May", Order = 5},
      new MonthDefinitions {Month = "June", Order = 6},
      new MonthDefinitions {Month = "July", Order = 7},
      new MonthDefinitions {Month = "August", Order = 8},
      new MonthDefinitions {Month = "September", Order = 9},
      new MonthDefinitions {Month = "October", Order = 10},
      new MonthDefinitions {Month = "November", Order = 11},
      new MonthDefinitions {Month = "December", Order = 12},
   };

   public int InspectorId { get; set; }
   public string InspectorName { get; set; }
   public IEnumerable<MonthData> FullYearData { get; set; }
}

public class MonthDefinitions
{
   public string Month { get; set; }
   public int Order { get; set; }
}

public class MonthData
{
   public string Month { get; set; }
   public int TotalAuditsCompleted { get; set; }
   public int TotalNoDefects { get; set; }
   public decimal NonComplianceRate
   {
      get
      {
         if (TotalAuditsCompleted == 0)
         {
            return 0;
         }
         else
         {
            return (TotalNoDefects / (decimal)TotalAuditsCompleted) * 100;
         }
      }
   }
}

我正在尝试使用以下内容填充数据：

var inspectorData = 
    context.COESDetails
           .Where(x => 
                x.UploadCOESDetails.AuditZoneId == criteria.AuditZoneId &&
                x.UploadCOESDetails.AuditMonth.Contains(criteria.AuditYear))
           .Select(x => x.Inspector)
           .Where(y => y.Id != 0)
           .Distinct()
           .OrderBy(x => x.Firstname)
           .Select(ud => new NonComplianceData
                         {
                             InspectorId = ud.Id,
                             InspectorName = ud.Firstname + " " + ud.Surname,
                             FullYearData = 
                                NonComplianceData.Months.Select(month => 
                                         new MonthData
                                         {
                                             Month = month.Month,
                                         })
                          });

我收到以下错误

base {System.SystemException} = {“无法创建常量值输入'AIS.Domain.Models.MonthDefinitions'。只有原始类型或在此上下文中支持枚举类型。“}

任何帮助将不胜感激..谢谢

附加说明：

如果我使用此

，问题就解决了

public static IEnumerable<string> Months = 
    new string[] { "January", "February", "March", "April", "May", "June", 
                    "July", "August", "September", "October", "November", "December" };

但我需要确保正确分类月份，这就是我添加订单属性的原因

Answer 1

给出您的错误消息：

{＆＃34;无法创建类型＆＃39; AIS.Domain.Models.MonthDefinitions＆＃39;的常量值。在此上下文中仅支持原始类型或枚举类型。＆＃34;}

我会说您应该在select子句中添加toList()，因为您正在使用的ORM（可能是实体框架？）无法将您的复杂对象Months转换为正确的查询。 / p>

我使用以下代码得到以下错误，如何解决？

1 个答案: