AssociationAttribute Class

AssociationAttribute Class


Designates a property to represent a database association, such as a foreign key relationship.

Namespace:   System.Data.Linq.Mapping
Assembly:  System.Data.Linq (in System.Data.Linq.dll)


[AttributeUsageAttribute(AttributeTargets::Property | AttributeTargets::Field, 
	AllowMultiple = false)]
public ref class AssociationAttribute sealed : DataAttribute


Initializes a new instance of the AssociationAttribute class.


When placed on a 1:1 association whose foreign key members are all non-nullable, deletes the object when the association is set to null.


Gets or sets delete behavior for an association.


Gets or sets the member as the foreign key in an association representing a database relationship.


Gets or sets the indication of a uniqueness constraint on the foreign key.


Gets or sets the name of a column.(Inherited from DataAttribute.)


Gets or sets one or more members of the target entity class as key values on the other side of the association.


Gets or sets a private storage field to hold the value from a column.(Inherited from DataAttribute.)


Gets or sets members of this entity class to represent the key values on this side of the association.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute::GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute::GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute::Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

Use this attribute to represent an association in a database, such as the relationship between a foreign key and a primary key.

In the following example, the Order class includes an AssociationAttribute attribute to associate Orders with Customers.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 3.5
Windows Phone Silverlight
Available since 7.1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Return to top
© 2016 Microsoft