带有返回对象的Web API中存储过程中的语法不正确

Question

我有一个提供对象的存储过程。因此，我创建了一个可以捕获所有这些内容的类：

public class OwnerInfo
{
        public string UnitName { get; set; }
        public string UnitOwner { get; set; }
}

public class FirstInfo
{
        public string TType { get; set; }
        public string TransactionType { get; set; }
        public string Period_Covered { get; set; }
        public double? BillAmount { get; set; }
        public double? PaymentAmount { get; set; }
        public double? Balance { get; set; }
}

public class SecondInfo
{
        public string TType { get; set; }
        public string TransactionType { get; set; }
        public string Period { get; set; }
        public double? BillAmount { get; set; }
        public double? PaymentAmount { get; set; }
        public double? Balance { get; set; }
}

public class ThirdInfo
{
        public string TType { get; set; }
        public string TransactionType { get; set; }
        public string Period { get; set; }
        public double? PaymentAmount { get; set; }
}

public class FourthInfo
{
        public string TType { get; set; }
        public string Particulars { get; set; }
        public string PaymentDate { get; set; }
        public double? PaymentAmount { get; set; }
        public string ORNumber { get; set; }
}

public class DisplaySoa
{
        public OwnerInfo OwnerInfo { get; set; }
        public List<FirstInfo> FirstInfo { get; set; }
        public List<SecondInfo> SecondInfo { get; set; }
        public List<ThirdInfo> ThirdInfo { get; set; }
        public List<FourthInfo> FourthInfo { get; set; }
}

public class DisplaySoaParameter
{
        public int UnitID { get; set; }
        public int Month { get; set; }
        public int Year { get; set; }
}

我的存储过程在SQL Server中运行良好：

EXEC [dbo].[DISPLAY_SOA_V4]
            @UnitID = 1,
            @Month  = 11,
            @Year   = 2018

然后我像这样调用此存储过程：

public  DisplaySoa DisplaySoa(DisplaySoaParameter model)
{
    using(var db = new ApplicationDbContext())
    {
         int unitid = Convert.ToInt32(model.UnitID);
         int month = Convert.ToInt32(model.Month);
         int year = Convert.ToInt32(model.Year);

         try
         {
             //const string query = "[dbo].[DUES_AUTO_PAYMENT] @PaymentAmount @PaymentTypeID @ORNumber @UnitID @CurrentDateTime";
             const string query = "[dbo].[DISPLAY_SOA_V4] @UnitID @Month @Year";
             object[] parameter =
                        {
                            new SqlParameter
                            {
                                ParameterName = "@UnitID",
                                Value = unitid,
                                Direction = ParameterDirection.Input,
                                //SqlDbType = SqlDbType.Int
                            },
                            new SqlParameter
                            {
                                ParameterName = "@Month",
                                Value = month,
                                Direction = ParameterDirection.Input,
                               //SqlDbType = SqlDbType.Int
                            },
                            new SqlParameter
                            {
                                ParameterName = "@Year",
                                Value = year,
                                Direction = ParameterDirection.Input,
                                //SqlDbType = SqlDbType.Int
                            }
                        };

             var x = db.Database.SqlQuery<DisplaySoa>(query, parameter).FirstOrDefault();
             return x;
         }
         catch(Exception ed)
         {
             return null;
         }
    }
}

但是我在尝试捕获中遇到此错误

  

“ @ Month”附近的语法不正确

但是，如果我删除“ .firstOrDefault（）”，则会出现此错误：

  

另一个SqlParameterCollection已包含SqlParameter。

我真的需要您的帮助。谢谢。