c# – EF6异常：DbExpressionBinding需要一个带有ResultType集合

int[] serviceCodes= new int[] { 1610,1611,1612 };
byte[] payModes = new byte[] { 1,2 };
int[] months = new int[] { 10,11,12 };
int year = 2017;

using (var context = new FinanceConnection())
{
   var result = from a in
            (from a in context.BILL_INFO_DETAILS
             where
                 a.INPUT_STATUS == true &&
                 serviceCodes.Contains(a.SERVICE_INFO.SERVICE_CODE) &&
                 payModes.Contains(a.PAY_MODE_ID) &&
                 a.STAMP_DATE != null &&
                 months.Contains(a.STAMP_DATE.Value.Month) &&
                 a.STAMP_DATE.Value.Year == year &&
                 a.SERVICE_INFO.FEE > 1
             select new
             {
                 a.REQUESTED_QTY,a.ITEM_TOTAL,Dummy = "x"
             })
             group a by new { a.Dummy }
        into g
             select new ViewGuessAlMajlisOffline
             {
                 Transaction =
                     g.Sum(p => p.REQUESTED_QTY) == 0 ? (int?)null : (int)g.Sum(p => p.REQUESTED_QTY),Income = g.Sum(p => p.ITEM_TOTAL) == 0
                     ? (decimal?)null
                     : (decimal)g.Sum(p => p.ITEM_TOTAL)
             }; 

    result.Dump();
}

我用相同的标题搜索了SO问题,但我的包含列表是简单的数组,所以我不知道究竟是什么导致了异常.

任何指针都非常感谢.

更新

我已经尝试删除两个.Contains()在哪里和查询工作.实际上,只注释payModes.Contains(a.PAY_MODE_ID)使查询工作

更新

public partial class BILL_INFO_DETAIL : DA.Services.IBS.Data.EntityFramework.Helper.IBaseEntity
{
    public string BILL_NO { get; set; }
    public byte PAY_MODE_ID { get; set; }
    public int CASHIER_NO { get; set; }
    public int SERVICE_CODE { get; set; }
    public Nullable<int> REQUESTED_QTY { get; set; }
    public Nullable<int> CURRENT_QTY { get; set; }
    public Nullable<decimal> FEE { get; set; }
    public Nullable<decimal> ITEM_TOTAL { get; set; }
    public Nullable<decimal> VAT_AMOUNT { get; set; }
    public string USER_ID { get; set; }
    public Nullable<int> BUSINESS_USER_ID { get; set; }
    public Nullable<bool> INPUT_STATUS { get; set; }
    public Nullable<System.DateTime> STAMP_DATE { get; set; }

    public virtual BUSINESS_USER BUSINESS_USER { get; set; }
    public virtual CASHIER CASHIER { get; set; }
    public virtual PAY_MODE PAY_MODE { get; set; }
    public virtual SERVICE_INFO SERVICE_INFO { get; set; }
}