EntityTypeConfiguration<TEntityType>.HasKey<TKey> Method (Expression<Func<TEntityType, TKey>>)
Configures the primary key property(s) for this entity type.
Assembly: EntityFramework (in EntityFramework.dll)
[SuppressMessageAttribute("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")] [SuppressMessageAttribute("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")] public EntityTypeConfiguration<TEntityType> HasKey<TKey>( Expression<Func<TEntityType, TKey>> keyExpression )
Parameters
- keyExpression
-
Type:
System.Linq.Expressions.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 }
Return Value
Type: System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<TEntityType>The same EntityTypeConfiguration instance so that multiple calls can be chained.
Type Parameters
- TKey
The type of the key.