asp.net mvc项目在外键中使用firebird数据库错误

时间：2017-09-21 07:05:02

标签： c# asp.net asp.net-mvc entity-framework firebird

我使用Firebird作为我需要使用ASP.NET MVC 5开发b2b应用程序所需的数据库。在表之间使用外键是否有错误，是否可以添加必要的修复程序？ Visual Studio提供的错误如下：EntityFramework.dll中出现“System.InvalidOperationException”类型的异常，但未在用户代码中处理。

在处理单个非相关表时，我没有遇到任何错误。我认为我错误地建立了表之间的关系。

DatabaseContext类，这个类数据库连接; 

namespace InoturYolcuKayit.Models
{
    [DbConfigurationType(typeof(FirebirdContextConfiguration))]
    public class DatabaseContext : DbContext
    {
        public DatabaseContext()
            : base(new FbConnection(@"database=D:\data\INOTUR.FDB;charset=WIN1254;user=sysdba;password=ino38sis;"), true)
        { }

        public DbSet<PERSONEL> Personel { get; set; }

        public DbSet<ROLES> Roles { get; set; }
    }
}

FirebirdContextConfiguration类：

namespace InoturYolcuKayit.Models
{
    class FirebirdContextConfiguration : DbConfiguration
    {
        public FirebirdContextConfiguration()
        {
            SetDatabaseInitializer<DatabaseContext>(null);
        }
    }
}

表中的PERSONEL.cs Firebird数据库; 

public class PERSONEL
{
  [Key, Required]
  public int PERSONEL_NO { get; set; }

  [Required, StringLength(30)]
  public string ADI { get; set; }

  public int ULKE_NO { get; set; }

  [ForeignKey("ROLES")]
  [Column("ROLE_ID")]
  public int ROLE_ID { get; set; }

  public ROLES ROLES { get; set; }                 

}

表中的ROLES.cs firebird数据库; 

public class ROLES
{
    public ROLES()
    {
       PERSONEL = new List<PERSONEL>();
    }

    [Key, Required]
    public int ROLE_ID { get; set; }

    [StringLength(30)]
    public string ROLE_NAME { get; set; }


    public virtual ICollection<PERSONEL> PERSONEL { get; set; }

}

我在一个简单的代码行中ROLES_ID收到此错误，该代码列出PERSONELS控制器中的索引viewda人员：

EntityFramework.dll中发生了'System.InvalidOperationException'类型的异常，但未在用户代码中处理。

public class PERSONELsController : Controller
{
    private DatabaseContext db = new DatabaseContext();

    // GET: PERSONELs
    public ActionResult Index()
    {
       var personel = db.Personel.Include(p => p.ROLES);
       return View(personel.ToList());
    }
}

此错误堆栈跟踪; 

    [InvalidOperationException: Sequence does not contain matching items]
   System.Linq.Enumerable.Single(IEnumerable`1 source, Func`2 predicate) +2643765
   System.Data.Entity.Utilities.DbProviderManifestExtensions.GetStoreTypeFromName(DbProviderManifest providerManifest, String name) +81
   System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.ConfigureColumn(EdmProperty column, EntityType table, DbProviderManifest providerManifest) +87
   System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.BinaryPropertyConfiguration.ConfigureColumn(EdmProperty column, EntityType table, DbProviderManifest providerManifest) +120
   System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.Configure(EdmProperty column, EntityType table, DbProviderManifest providerManifest, Boolean allowOverride, Boolean fillFromExistingConfiguration) +138
   System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.<>c__DisplayClass4.<Configure>b__3(Tuple`2 pm) +38
   System.Data.Entity.Utilities.IEnumerableExtensions.Each(IEnumerable`1 ts, Action`1 action) +130
   System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.Configure(IEnumerable`1 propertyMappings, DbProviderManifest providerManifest, Boolean allowOverride, Boolean fillFromExistingConfiguration) +94
   System.Data.Entity.ModelConfiguration.Configuration.Types.StructuralTypeConfiguration.ConfigurePropertyMappings(IList`1 propertyMappings, DbProviderManifest providerManifest, Boolean allowOverride) +154
   System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.ConfigurePropertyMappings(DbDatabaseMapping databaseMapping, EntityType entityType, DbProviderManifest providerManifest, Boolean allowOverride) +585
   System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.Configure(EntityType entityType, DbDatabaseMapping databaseMapping, DbProviderManifest providerManifest) +177
   System.Data.Entity.ModelConfiguration.Configuration.ModelConfiguration.ConfigureEntityTypes(DbDatabaseMapping databaseMapping, ICollection`1 entitySets, DbProviderManifest providerManifest) +423
   System.Data.Entity.ModelConfiguration.Configuration.ModelConfiguration.Configure(DbDatabaseMapping databaseMapping, DbProviderManifest providerManifest) +376
   System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo) +444
   System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection) +55
   System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext) +61
   System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input) +123
   System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +616
   System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +18
   System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +53
   System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator() +16
   System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator() +54
   System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +375
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +58
   hacumre.Controllers.HEDIYELERsController.Index() in C:\Users\Abdullah\source\repos\hacumre\hacumre\Controllers\HEDIYELERsController.cs:21
   lambda_method(Closure , ControllerBase , Object[] ) +61
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +157
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +228
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9987157
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

1 个答案:

答案 0 :(得分：0)

在PERSONNEL类中，您在属性之间反转了DataAnnotations，而Roles属性不是虚拟的，请使用：

  [Column("ROLE_ID")] // facultative cause the property has the same name
  public int ROLE_ID { get; set; }

  [ForeignKey("ROLE_ID ")]
  public virtual ROLES ROLES { get; set; }
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