映射

Question

當我使用automapper V4.1.1和automapper.data1.0.0.beta 1.我有控制檯應用程序，我的映射代碼AutoMapper.Data錯誤的樣子：

Mapper.Initialize(cfg => { 
      MapperRegistry.Mappers.Add(new DataReaderMapper {YieldReturnEnabled = true} 
      ); 

      cfg.CreateMap<IDataRecord, AircraftDetails>(); 

     }); 

我的DB調用代碼映射看起來像

var aircraft=new AircraftDetails();   
     using (SqlConnection connection = 
       new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings[_connectionString].ConnectionString)) 
     { 
      SqlCommand command = 
       new SqlCommand(storedProcedureAsString, connection); 


      command.AddInputParameters(new {a=aircraftId}); 

      connection.Open(); 

      SqlDataReader reader = command.ExecuteReader(); 
      if (reader.HasRows) 
      { 

       var res = Mapper.Map<IDataReader, IEnumerable<AircraftDetails>>(reader); 

       aircraft = res.FirstOrDefault(); 
      } 

     } 

     return aircraft; 

當我運行這段代碼我得到錯誤：

Unhandled Exception: System.InvalidCastException: Specified cast is not valid. at DynamicCreate(IDataRecord) at AutoMapper.Data.DataReaderMapper.d__10.MoveNext() at System.Linq.Enumerable.d__94 1.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable 1 source)

任何想法我做錯了嗎？

乾杯

伊斯梅爾

Answer 1

不知道，但可能是你不應該創建映射IDataRecord，但IDataReader的：

cfg.CreateMap<IDataReader, IEnumerable<AircraftDetails>>(); 

基於this question