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 | |
|---|---|---|
.gif "Public method") .gif "Supported by Silverlight for Windows Phone") |
AssociationAttribute | Initializes a new instance of the AssociationAttribute class. |
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Properties
| Name | Description | |
|---|---|---|
.gif "Public property") |
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. |
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DeleteRule | Gets or sets delete behavior for an association. |
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IsForeignKey | Gets or sets the member as the foreign key in an association representing a database relationship. |
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IsUnique | Gets or sets the indication of a uniqueness constraint on the foreign key. |
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Name | Gets or sets the name of a column. (Inherited from DataAttribute.) |
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OtherKey | Gets or sets one or more members of the target entity class as key values on the other side of the association. |
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Storage | Gets or sets a private storage field to hold the value from a column. (Inherited from DataAttribute.) |
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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.) |
.gif "Protected method") |
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.) |
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GetHashCode | Returns the hash code for this instance. (Inherited from Attribute.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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Match | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.) |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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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.