automapper显示错误“指定的强制转换无效” .

我在使用模型映射DataTable时遇到错误

这是我的代码

if (file.ContentLength > 0)
        {
            var extension = Path.GetExtension(file.FileName);
            if (extension != null && extension.ToLower() != ".xlsx")
            {
                return "please upload file with extension .xlsx";
            }

            Stream stream = file.InputStream;
            IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
            excelReader.IsFirstRowAsColumnNames = true;
            DataSet result = excelReader.AsDataSet();
            if (result.Tables.Count > 0)
            {
                Mapper.Reset();
                Mapper.CreateMap<IDataReader, ExcelFeedbackRecord>();

                var results = Mapper.Map<IDataReader, IList<ExcelFeedbackRecord>>(result.Tables[0].CreateDataReader());

            }
            return result.Tables[0].Rows.Count.ToString();
        }

错误的堆栈跟踪如下

[InvalidCastException：指定的强制转换无效 . ] DynamicCreate（IDataRecord）1673
AutoMapper.Mappers.DataReaderMapper.Map（ResolutionContext context，IMappingEngineRunner mapper）433 AutoMapper.MappingEngine.AutoMapper.IMappingEngineRunner.Map（ResolutionContext context）347 [AutoMapperMappingException：试图将System.Data.IDataReader映射到System.Collections.Generic.IList1 [[ SkillKindle.BLL.Feedbacks.ExcelFeedbackRecord，SkillKindle.BLL，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = null]] . 抛出了“AutoMapper.AutoMapperMappingException”类型的异常 . ] AutoMapper.MappingEngine.AutoMapper.IMappingEngineRunner.Map（ResolutionContext context）433 AutoMapper.MappingEngine.Map（Object source，Type sourceType，Type destinationType，Action1 opts）353 AutoMapper.MappingEngine.Map （TSource源码）564 AutoMapper.Mapper.Map（TSource源码）461 SkillKindleAdmin.Controllers.FeedbackController.ExcelUpload（HttpPostedFileBase文件）在d：\ Skill Online \ trunk \ SkillKindleAdmin \ Controllers \ FeedbackController.cs：57 lambda_method（Closure，ControllerBase， Object []）107 System.Web.Mvc.ActionMethodDispatcher.Execute（ControllerBase controller，Object [] parameters）286 System.Web.Mvc.ReflectedActionDescriptor.Execute（ControllerContext controllerContext，IDictionary2 parameters）655 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod （ControllerContext controllerContext，ActionDescriptor actionDescriptor，IDictionary2参数）326 System.Web.Mvc.Async.AsyncControllerActionInv oker.InvokeSynchronousActionMethod（ControllerContext controllerContext，ActionDescriptor actionDescriptor，IDictionary2 parameters）317 System.Web.Mvc.Async . <> c__DisplayClass42 . <BeginInvokeSynchronousActionMethod> b__41（）219 System.Web.Mvc.Async . <> c__DisplayClass81.b__7（IAsyncResult）275 System.Web.Mvc.Async.WrappedAsyncResult1.End（）328 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）492 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod（IAsyncResult asyncResult）261 System .Web.Mvc.Async . <> c__DisplayClass39 . <BeginInvokeActionMethodWithFilters> b__33（）268 System.Web.Mvc.Async . <> c__DisplayClass4f . <InvokeActionMethodFilterAssechronously> b__49（）461 System.Web.Mvc.Async . <> c__DisplayClass37 . < BeginInvokeActionMethodWithFilters> b__36（IAsyncResult asyncResult）235 System.Web.Mvc.Async.WrappedAsyncResult1.End（）328 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）492 System.Web.Mvc.Async.AsyncCo ntrollerActionInvoker.EndInvokeActionMethodWithFilters（IAsyncResult asyncResult）262 System.Web.Mvc.Async . <> c_DisplayClass2a.b_20（）203 System.Web.Mvc.Async . <> c_DisplayClass25.b_22（IAsyncResult asyncResult）392 System.Web.Mvc.Async . WrappedAsyncResult1.End（）316 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）387 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction（IAsyncResult asyncResult）285 System.Web.Mvc . <> c__DisplayClass1d . <BeginExecuteCore> b__18（IAsyncResult asyncResult）234 System.Web.Mvc.Async . <> c__DisplayClass4 . <MakeVoidDelegate> b__3（IAsyncResult ar）275 System.Web.Mvc.Async.WrappedAsyncResult1.End（）333 System.Web.Mvc .Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）397 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）266 System.Web.Mvc.Controller.EndExecuteCore（IAsyncResult asyncResult）253 System.Web .Mvc.Async . <> c_DisplayClass4.b__3（IAsyncResult ar）275 System.Web . Mvc.Async.WrappedAsyncResult1.End（）333 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）397 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）266系统 . Web.Mvc.Controller.EndExecute（IAsyncResult asyncResult）254 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute（IAsyncResult asyncResult）226 System.Web.Mvc . <> c__DisplayClass8 . <BeginProcessRequest> b__3 （IAsyncResult asyncResult）230 System.Web.Mvc.Async . <> c__DisplayClass4 . <MakeVoidDelegate> b__3（IAsyncResult ar）275 System.Web.Mvc.Async.WrappedAsyncResult1.End（）333 System.Web.Mvc.Async.AsyncResultWrapper . End（IAsyncResult asyncResult，Object tag）397 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）266System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）255 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest（IAsyncResult result）225 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（ ）1086 System.Web.HttpApplication.ExecuteStep（IExecutionStep step，Boolean＆completedSynchronously）603