使用Dapper的Sql查询返回空结果,但分析器的请求结果不为空

时间:2019-04-01 13:36:16

标签: c# dapper

我使用dapper进行了SQL查询,并且返回空结果。但是,如果我运行SQL事件探查器并执行我看到的请求,结果将不会为空。

这是我的代码

    public class Parameters
    {
        public DateTime? SinceDate { get; set; }
        public DateTime? UntilDate { get; set; }
        public byte NetworkId { get; set; } = 7;
    }

    var parameters = new Parameters()
    {
        SinceDate = startDate,
        UntilDate = endDate,
        NetworkId = networkId,
    };

    DynamicParameters requestParameters = new DynamicParameters();
    requestParameters .Add("@sinceDateFilter", parameters.SinceDate, DbType.DateTime);
    requestParameters .Add("@untilDateFilter", parameters.UntilDate, DbType.DateTime);
    requestParameters .Add("@networkId", parameters.networkId, DbType.Byte);

   using (var secondConn = new SqlConnection(ConnectionString))
   {
       var query = secondConn.Query<ReportRow>(
       "[dbo].[GET_Report] @sinceDateFilter, @untilDateFilter, @NetworkId",
       requestParameters,
       commandTimeout: 500
       );
       Groups = query.ToList();
   }


    public class ReportRow
    {
        public string Network { get; set; }
        public ulong Clicks { get; set; }
        public decimal Profit { get; set; }
    }

在调试器中,我看到“组”为空,但是如果运行sql profiler,则看到此代码发出的请求是

exec sp_executesql N'[dbo].[GET_Report] @sinceDateFilter, @untilDateFilter, @networkId',N'@sinceDateFilter datetime,@untilDateFilter datetime, @networkId tinyint',@sinceDateFilter='2019-04-01 00:00:00',@untilDateFilter='2019-04-02 00:00:00',@networkId=7

如果我从Management Studio执行此操作,则会看到包含数据的表:

+----------+--------+--------+
| Network  | Clicks | Profit |
+----------+--------+--------+
| Network1 |  38835 | 0.45   |
| Network2 |  38835 | 0.35   |
+----------+--------+--------+

1 个答案:

答案 0 :(得分:0)

如果要通过存储过程执行。

您可以尝试设置commandType参数。

使用CommandType.StoredProcedure

进行设置
using (var secondConn = new SqlConnection(ConnectionString))
{
   var query = secondConn.Query<ReportRow>(
   "[dbo].[GET_Report]",
   requestParameters,
   commandTimeout: 500, 
   commandType: CommandType.StoredProcedure
   );
   Groups = query.ToList();
}