EntityTypeConfiguration<TEntityType>.HasKey Method
Definition
Important
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Overloads
| HasKey<TKey>(Expression<Func<TEntityType,TKey>>) |
Configures the primary key property(s) for this entity type. |
| HasKey<TKey>(Expression<Func<TEntityType,TKey>>, Action<PrimaryKeyIndexConfiguration>) |
Configures the primary key property(s) for this entity type. |
HasKey<TKey>(Expression<Func<TEntityType,TKey>>)
Configures the primary key property(s) for this entity type.
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
public System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<TEntityType> HasKey<TKey> (System.Linq.Expressions.Expression<Func<TEntityType,TKey>> keyExpression);[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
public System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<TEntityType> HasKey<TKey> (System.Linq.Expressions.Expression<Func<TEntityType,TKey>> keyExpression);member this.HasKey : System.Linq.Expressions.Expression<Func<'EntityType, 'Key>> -> System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<'EntityType (requires 'EntityType : null)>Public Function HasKey(Of TKey) (keyExpression As Expression(Of Func(Of TEntityType, TKey))) As EntityTypeConfiguration(Of TEntityType)Type Parameters
- TKey
The type of the key.
Parameters
- keyExpression
- Expression<Func<TEntityType,TKey>>
A lambda expression representing the property to be used as the primary key. C#: t => t.Id VB.Net: Function(t) t.Id If the primary key is made up of multiple properties then specify an anonymous type including the properties. C#: t => new { t.Id1, t.Id2 } VB.Net: Function(t) New With { t.Id1, t.Id2 }
Returns
The same EntityTypeConfiguration instance so that multiple calls can be chained.
- Attributes
Applies to
HasKey<TKey>(Expression<Func<TEntityType,TKey>>, Action<PrimaryKeyIndexConfiguration>)
Configures the primary key property(s) for this entity type.
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
public System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<TEntityType> HasKey<TKey> (System.Linq.Expressions.Expression<Func<TEntityType,TKey>> keyExpression, Action<System.Data.Entity.ModelConfiguration.Configuration.PrimaryKeyIndexConfiguration> buildAction);member this.HasKey : System.Linq.Expressions.Expression<Func<'EntityType, 'Key>> * Action<System.Data.Entity.ModelConfiguration.Configuration.PrimaryKeyIndexConfiguration> -> System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<'EntityType (requires 'EntityType : null)>Public Function HasKey(Of TKey) (keyExpression As Expression(Of Func(Of TEntityType, TKey)), buildAction As Action(Of PrimaryKeyIndexConfiguration)) As EntityTypeConfiguration(Of TEntityType)Type Parameters
- TKey
The type of the key.
Parameters
- keyExpression
- Expression<Func<TEntityType,TKey>>
A lambda expression representing the property to be used as the primary key. C#: t => t.Id VB.Net: Function(t) t.Id If the primary key is made up of multiple properties then specify an anonymous type including the properties. C#: t => new { t.Id1, t.Id2 } VB.Net: Function(t) New With { t.Id1, t.Id2 }
- buildAction
- Action<PrimaryKeyIndexConfiguration>
A builder to configure the key.
Returns
The same EntityTypeConfiguration instance so that multiple calls can be chained.
- Attributes
Applies to
Entity Framework