DatabaseSchemaUpdater Class
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
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
Public NotInheritable Class DatabaseSchemaUpdater
public sealed class DatabaseSchemaUpdater
The DatabaseSchemaUpdater type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
.gif "Public property") |
Context | Gets the data context object that represents the corresponding local database. |
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DatabaseSchemaVersion | Get or sets the version of the corresponding local database schema. |
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Methods
| Name | Description | |
|---|---|---|
.gif "Public method") |
AddAssociation<(Of <(T>)>) | Adds a database association, such as a foreign key relationship, to a local database. |
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AddColumn<(Of <(T>)>) | Adds a database column to a local database. |
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AddIndex<(Of <(T>)>) | Adds a database index to a local database. |
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AddTable<(Of <(T>)>) | Adds a table to a local database. |
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Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Execute | Submits schema changes to the local database in a single transaction. |
.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 | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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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
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 for Windows Phone 8.
Version Information
Windows Phone OS
Supported in: 8.1, 8.0
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.