EntityTypeConfiguration<TEntityType>.HasKey<TKey> Method (Expression<Func<TEntityType, TKey>>)

Configures the key property(s) for this entity type.

Namespace:   System.Web.Http.OData.Builder
Assembly:  System.Web.Http.OData (in System.Web.Http.OData.dll)

Syntax

public EntityTypeConfiguration<TEntityType> HasKey<TKey>(
    Expression<Func<TEntityType, TKey>> keyDefinitionExpression
)

public:
generic<typename TKey>
EntityTypeConfiguration<TEntityType>^ HasKey(
    Expression<Func<TEntityType, TKey>^>^ keyDefinitionExpression
)

member HasKey<'TKey> : 
        keyDefinitionExpression:Expression<Func<'TEntityType, 'TKey>> -> EntityTypeConfiguration<'TEntityType>

Public Function HasKey(Of TKey) (
    keyDefinitionExpression As Expression(Of Func(Of TEntityType, TKey))
) As EntityTypeConfiguration(Of TEntityType)

Parameters

• keyDefinitionExpression
  Type: System.Linq.Expressions.Expression<Func<TEntityType, TKey>>

  A lambda expression representing the property to be used as the primary key. For example, in C# t =&gt; t.Id and in Visual Basic .Net Function(t) t.Id.

Return Value

Type: System.Web.Http.OData.Builder.EntityTypeConfiguration<TEntityType>

Returns itself so that multiple calls can be chained.

Type Parameters

• TKey
  The type of key.

See Also

EntityTypeConfiguration<TEntityType> Class
System.Web.Http.OData.Builder Namespace

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