项目
11/17/2011

DatabaseSchemaUpdater Class

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Enables local database schema and version changes in Windows Phone applications.

Inheritance Hierarchy

System.Object
Microsoft.Phone.Data.Linq.DatabaseSchemaUpdater

Namespace: Microsoft.Phone.Data.Linq
Assembly: System.Data.Linq (in System.Data.Linq.dll)

Syntax

'Declaration
Public NotInheritable Class DatabaseSchemaUpdater

public sealed class DatabaseSchemaUpdater

The DatabaseSchemaUpdater type exposes the following members.

Properties

	Name	Description
	Context	Gets the data context object that represents the corresponding local database.
	DatabaseSchemaVersion	Get or sets the version of the corresponding local database schema.

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Methods

	Name	Description
	AddAssociation<T>	Adds a database association, such as a foreign key relationship, to a local database.
	AddColumn<T>	Adds a database column to a local database.
	AddIndex<T>	Adds a database index to a local database.
	AddTable<T>	Adds a table to a local database.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Execute	Submits schema changes to the local database in a single transaction.
	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	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	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

The database does not change to reflect updates from the DatabaseSchemaUpdater object until the Execute() method is called. When that method is called, all changes are submitted to the local database as a single transaction, including version updates. Using a single transaction helps the database maintain integrity, such as in cases where the user exits the application during an upgrade.

For information about using a local database in your Windows Phone application, see Local Database Overview for Windows Phone.

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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