我正在使用EF 4.1开发ASP.Net MVC 3 Web应用程序。从今天开始,我收到了这个错误:
System.ArgumentException:程序集中的重复类型名称
我无法弄清楚造成它的原因。执行查找时,它在我的存储库中发生:
public virtual T GetById(long id)
{
return dbset.Find(id);
}
这是堆栈跟踪:
[ArgumentException: Duplicate type name within an assembly.]
System.Reflection.Emit.ModuleBuilder.CheckTypeNameConflict(String strTypeName, TypeBuilder enclosingType) +9544354
System.Reflection.Emit.AssemblyBuilderData.CheckTypeNameConflict(String strTypeName, TypeBuilder enclosingType) +53
System.Reflection.Emit.TypeBuilder.Init(String fullname, TypeAttributes attr, Type parent, Type[] interfaces, Module module, PackingSize iPackingSize, Int32 iTypeSize, TypeBuilder enclosingType) +178
System.Reflection.Emit.ModuleBuilder.DefineType(String name, TypeAttributes attr, Type parent, Type[] interfaces) +118
System.Data.Objects.Internal.ProxyTypeBuilder.get_TypeBuilder() +299
System.Data.Objects.Internal.ProxyTypeBuilder.CreateType(ModuleBuilder moduleBuilder) +227
System.Data.Objects.Internal.EntityProxyFactory.BuildType(ModuleBuilder moduleBuilder, ClrEntityType ospaceEntityType) +63
System.Data.Objects.Internal.EntityProxyFactory.TryCreateProxyType(EntityType ospaceEntityType) +193
System.Data.Objects.Internal.EntityProxyFactory.GetProxyType(ClrEntityType ospaceEntityType) +104
System.Data.Common.Internal.Materialization.Translator.Visit(EntityColumnMap columnMap, TranslatorArg arg) +178
System.Data.Query.InternalTrees.EntityColumnMap.Accept(ColumnMapVisitorWithResults`2 visitor, TArgType arg) +16
System.Data.Common.Internal.Materialization.Translator.ProcessCollectionColumnMap(CollectionColumnMap columnMap, TranslatorArg arg, ColumnMap discriminatorColumnMap, Object discriminatorValue) +116
System.Data.Common.Internal.Materialization.Translator.Visit(SimpleCollectionColumnMap columnMap, TranslatorArg arg) +13
System.Data.Query.InternalTrees.SimpleCollectionColumnMap.Accept(ColumnMapVisitorWithResults`2 visitor, TArgType arg) +17
System.Data.Common.Internal.Materialization.Translator.TranslateColumnMap(QueryCacheManager queryCacheManager, ColumnMap columnMap, MetadataWorkspace workspace, SpanIndex spanIndex, MergeOption mergeOption, Boolean valueLayer) +314
System.Data.Common.Internal.Materialization.TypedShaperFactoryCreator`1.TypedCreate(QueryCacheManager cacheManager, ColumnMap columnMap, MetadataWorkspace metadata, SpanIndex spanInfo, MergeOption mergeOption, Boolean valueLayer) +64
System.Data.Common.Internal.Materialization.ShaperFactory.Create(Type elementType, QueryCacheManager cacheManager, ColumnMap columnMap, MetadataWorkspace metadata, SpanIndex spanInfo, MergeOption mergeOption, Boolean valueLayer) +185
System.Data.Objects.Internal.ObjectQueryExecutionPlan.Prepare(ObjectContext context, DbQueryCommandTree tree, Type elementType, MergeOption mergeOption, Span span, ReadOnlyCollection`1 compiledQueryParameters) +285
System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption) +696
System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +149
System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() +44
System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source) +184
System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2(IEnumerable`1 sequence) +41
System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +59
System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +150
System.Linq.Queryable.SingleOrDefault(IQueryable`1 source) +265
System.Data.Entity.Internal.Linq.InternalSet`1.FindInStore(WrappedEntityKey key, String keyValuesParamName) +602
System.Data.Entity.Internal.Linq.InternalSet`1.Find(Object[] keyValues) +124
System.Data.Entity.DbSet`1.Find(Object[] keyValues) +12
XXXXXXXX.Data.Infrastructure.RepositoryBase`1.GetById(Int64 id) in C:\XXXXXXXX\XXXXXXXX\XXXXXXXX.Data\Infrastructure\RepositoryBase.cs:58
MatchesHorsConcours.Service.MatchService.GetMatch(Int32 id) in C:\XXXXXXXX\XXXXXXXX\XXXXXXXX.Service\XxxService.cs:55
XXXXXXXX.Controllers.XXXXXXXX.Edit(Int32 id) in C:\XXXXXXXX\XXXXXXXX\XXXXXXXX.Web\Controllers\XxxController.cs:130
lambda_method(Closure , ControllerBase , Object[] ) +101
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +208
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +263
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
System.Web.Mvc.Controller.ExecuteCore() +116
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8920029
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
这可能与我复制外键的表有关。它被称为myKeyId,我现在在该表中有myKey1Id和myKey2Id。我在我的代码中到处检查,我再也找不到myKeyId了。
错误消息非常通用,我不知道如何确定导致此错误的原因。欢迎任何建议。
答案 0 :(得分:25)
我遇到了同样的错误。
我做了清洁解决方案重建并且有效。
答案 1 :(得分:3)
我的解决方案是关闭IIS,然后再次启动VS项目。
答案 2 :(得分:2)
我今天也遇到了这个错误。 事实证明,我的数据模型缺少数据库中的外键和主键约束。 我已将原始数据库复制到本地数据库以加快执行速度,但我只复制了数据而不是关系。 我在这方面遇到的其他错误是
an item with the same key has already been added
和
Unable to update the EntitySet Table because it has a DefiningQuery and no InsertFunction element exists in the ModificationFunctionMapping element to support the current operation
这一切都是由于一个虚假的数据库结构
答案 3 :(得分:1)
今天进入这个问题。我从实体模型.edmx
文件中删除了所有表格,从数据库中更新了我的模型(right-click --> update from database
)。
然后我重新编译,它运行正常。这样一个奇怪的错误。
我正在运行MVC 4和EF 5.0