Статья
11/18/2011

AssociationAttribute Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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

Inheritance Hierarchy

System.Object
  System.Attribute
    System.Data.Linq.Mapping.DataAttribute
      System.Data.Linq.Mapping.AssociationAttribute

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

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Property Or AttributeTargets.Field, AllowMultiple := False)> _
Public NotInheritable Class AssociationAttribute _
    Inherits DataAttribute

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

The AssociationAttribute type exposes the following members.

Constructors

	Name	Description
	AssociationAttribute	Initializes a new instance of the AssociationAttribute class.

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Properties

	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.

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Methods

	Name	Description
	Equals	Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Returns the hash code for this instance. (Inherited from Attribute.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Match	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

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

Topic	Location
Querying Across Relationships (LINQ to SQL)	LINQ to SQL
How to: Map Database Relationships (LINQ to SQL)	LINQ to SQL
Attribute-Based Mapping (LINQ to SQL)	LINQ to SQL
The LINQ to SQL Object Model	LINQ to SQL
LINQ to SQL Queries	LINQ to SQL
Querying Across Relationships (LINQ to SQL)	LINQ to SQL
How to: Map Database Relationships (LINQ to SQL)	LINQ to SQL
Attribute-Based Mapping (LINQ to SQL)	LINQ to SQL
The LINQ to SQL Object Model	LINQ to SQL
LINQ to SQL Queries	LINQ to SQL

Version Information

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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

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