引数 'name'はnullでも空でも空白でもかまいません

Question

以下のエラーが発生しています。私は問題をグーグルで試してみました。しかし、私が見つけた投稿のどれもが私を助けませんでした。

EDIT：Per Henkの返信です。問題のテーブル。

[Table("TransactionDetail")] 
public partial class TransactionDetail 
{ 
    [Key, Column(Order = 1), DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    public long TransactionDetailId { get; set; } 
    public string TransactionName { get; set; } 
    public string TransactionValue { get; set; } 

    public virtual OriginalTransaction OriginalTrans { get; set; } 
} 

その他の部分。

public partial class TransactionDetail 
{ 
    public Transaction trans; 
} 

特に、私がLINQ "MyContext.SomeDB.Find（x）"を使用するとエラーが発生します。 （これが役立つ場合）。

私はそれが私はそれがある解決に役立つ私の問題は合わなくているようだ見てきましたいくつかのポスト：

接続文字列：（.configファイル内）。

<add name="TransactionEF" 
connectionString="some connection string" 
providerName="System.Data.EntityClient" /> 

EDMX Connectionstring 'name'

Value cannot be null. Parameter name: source

Getting Error The argument 'nameOrConnectionString' cannot be null, empty or contain only white space with Azure Database

ここに私のdbContextクラスです。

public partial class TransactionEF : DbContext 
{ 
    public TransactionEF() 
     : base("name=TransactionEF") 
    { 
    } 
    ... 
} 

System.ArgumentException: The argument 'name' cannot be null, empty or contain only white space. 
at System.ComponentModel.DataAnnotations.Schema.TableAttribute..ctor(String name) 
at System.Reflection.CustomAttribute._CreateCaObject(RuntimeModule pModule, IRuntimeMethodInfo pCtor, Byte** ppBlob, Byte* pEndBlob, Int32* pcNamedArgs) 
at System.Reflection.CustomAttribute.CreateCaObject(RuntimeModule module, IRuntimeMethodInfo ctor, IntPtr& blob, IntPtr blobEnd, Int32& namedArgs) 
at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent) 
at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeType type, RuntimeType caType, Boolean inherit) 
at System.ComponentModel.ReflectTypeDescriptionProvider.ReflectGetAttributes(Type type) 
at System.ComponentModel.ReflectTypeDescriptionProvider.ReflectedTypeData.GetAttributes() 
at System.ComponentModel.TypeDescriptor.TypeDescriptionNode.DefaultTypeDescriptor.System.ComponentModel.ICustomTypeDescriptor.GetAttributes() 
at System.ComponentModel.TypeDescriptor.TypeDescriptionNode.DefaultTypeDescriptor.System.ComponentModel.ICustomTypeDescriptor.GetAttributes() 
at System.ComponentModel.DataAnnotations.AssociatedMetadataTypeTypeDescriptor.GetAttributes() 
at System.Data.Entity.ModelConfiguration.Utilities.AttributeProvider.GetAttributes(Type type) 
at System.Data.Entity.ModelConfiguration.Conventions.TypeAttributeConfigurationConvention`1.<.ctor>b__1(Type t) 
at System.Data.Entity.ModelConfiguration.Conventions.TypeConventionWithHavingBase`1.ApplyCore(Type memberInfo, ModelConfiguration modelConfiguration) 
at System.Data.Entity.ModelConfiguration.Conventions.TypeConventionBase.Apply(Type memberInfo, ModelConfiguration modelConfiguration) 
at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ApplyModelConfiguration(Type type, ModelConfiguration modelConfiguration) 
at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ApplyModelConfiguration(Type type, ModelConfiguration modelConfiguration) 
at System.Data.Entity.ModelConfiguration.Mappers.TypeMapper.MapEntityType(Type type) 
at System.Data.Entity.ModelConfiguration.Mappers.NavigationPropertyMapper.Map(PropertyInfo propertyInfo, EntityType entityType, Func`1 entityTypeConfiguration) 
at System.Data.Entity.ModelConfiguration.Mappers.TypeMapper.MapEntityType(Type type) 
at System.Data.Entity.ModelConfiguration.Mappers.NavigationPropertyMapper.Map(PropertyInfo propertyInfo, EntityType entityType, Func`1 entityTypeConfiguration) 
at System.Data.Entity.ModelConfiguration.Mappers.TypeMapper.MapEntityType(Type type) 
at System.Data.Entity.ModelConfiguration.Mappers.NavigationPropertyMapper.Map(PropertyInfo propertyInfo, EntityType entityType, Func`1 entityTypeConfiguration) 
at System.Data.Entity.ModelConfiguration.Mappers.TypeMapper.MapEntityType(Type type) 
at System.Data.Entity.ModelConfiguration.Mappers.NavigationPropertyMapper.Map(PropertyInfo propertyInfo, EntityType entityType, Func`1 entityTypeConfiguration) 
at System.Data.Entity.ModelConfiguration.Mappers.TypeMapper.MapEntityType(Type type) 
at System.Data.Entity.DbModelBuilder.MapTypes(EdmModel model) 
at System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo) 
at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection) 
at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext) 
at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input) 
at System.Data.Entity.Internal.LazyInternalContext.InitializeContext() 
at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) 
at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() 
at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext() 
at System.Data.Entity.Internal.Linq.InternalSet`1.Find(Object[] keyValues) 
at MyCompany... 
at MyCompany... 
at MyCompany... 

Answer 1

at System.ComponentModel.DataAnnotations.Schema.TableAttribute..ctor(String name) 

あなたは、コードの関連部分を投稿しませんでした。このコンストラクタに関するものではありません。

TableAttribute Class

をチェックしてくださいあなたは、プロジェクト内の任意[Table]または[Table("")]を探してください。