AssociationAttribute Class
Designates a property to represent a database association, such as a foreign key relationship.
Assembly: System.Data.Linq (in System.Data.Linq.dll)
System.Attribute
System.Data.Linq.Mapping.DataAttribute
System.Data.Linq.Mapping.AssociationAttribute
| Name | Description | |
|---|---|---|
![]() | AssociationAttribute() | Initializes a new instance of the AssociationAttribute class. |
| Name | Description | |
|---|---|---|
![]() | DeleteOnNull | 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. |
![]() | DeleteRule | Gets or sets delete behavior for an association. |
![]() | IsForeignKey | Gets or sets the member as the foreign key in an association representing a database relationship. |
![]() | IsUnique | Gets or sets the indication of a uniqueness constraint on the foreign key. |
![]() | Name | Gets or sets the name of a column.(Inherited from DataAttribute.) |
![]() | OtherKey | Gets or sets one or more members of the target entity class as key values on the other side of the association. |
![]() | Storage | Gets or sets a private storage field to hold the value from a column.(Inherited from DataAttribute.) |
![]() | ThisKey | Gets or sets members of this entity class to represent the key values on this side of the association. |
![]() | TypeId |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | 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.) |
![]() | GetHashCode() | Returns the hash code for this instance.(Inherited from Attribute.) |
![]() | GetType() | |
![]() | IsDefaultAttribute() | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.) |
![]() | Match(Object) | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.) |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
| Name | Description | |
|---|---|---|
![]() ![]() | _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) | Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.) |
![]() ![]() | _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.) |
![]() ![]() | _Attribute.GetTypeInfoCount(UInt32) | Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.) |
![]() ![]() | _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.
private EntityRef<Customer> _Customer; // ... [Association(Name="FK_Orders_Customers", Storage="_Customer", ThisKey="CustomerID", IsForeignKey=true)] public Customer Customer { get { return this._Customer.Entity; } set { Customer previousValue = this._Customer.Entity; if (((previousValue != value) || (this._Customer.HasLoadedOrAssignedValue == false))) { this.SendPropertyChanging(); if ((previousValue != null)) { this._Customer.Entity = null; previousValue.Orders.Remove(this); } this._Customer.Entity = value; if ((value != null)) { value.Orders.Add(this); this._CustomerID = value.CustomerID; } else { this._CustomerID = default(string); } this.SendPropertyChanged("Customer"); } } }
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.



