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DataContext Class

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

The data context is an object representing the database, a proxy, containing Table objects that represent the tables in the database.

Inheritance Hierarchy

System.Object
  System.Data.Linq.DataContext

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

Syntax

'Declaration
Public Class DataContext _
    Implements IDisposable

public class DataContext : IDisposable

The DataContext type exposes the following members.

Constructors

  Name Description
Public methodSupported by Silverlight for Windows Phone DataContext(String) Initializes a new instance of the DataContext class by referencing a file source.
Public methodSupported by Silverlight for Windows Phone DataContext(String, MappingSource) Initializes a new instance of the DataContext class by referencing a file source and a mapping source.

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Properties

  Name Description
Public propertySupported by Silverlight for Windows Phone ChangeConflicts Returns a collection of objects that caused concurrency conflicts when SubmitChanges was called.
Public propertySupported by Silverlight for Windows Phone DeferredLoadingEnabled Specifies whether to delay-load one-to-many or one-to-one relationships.
Public propertySupported by Silverlight for Windows Phone LoadOptions Gets or sets the DataLoadOptions associated with this DataContext.
Public propertySupported by Silverlight for Windows Phone Log Specifies the destination to write the SQL query or command.
Public propertySupported by Silverlight for Windows Phone Mapping Returns the MetaModel on which the mapping is based.
Public propertySupported by Silverlight for Windows Phone ObjectTrackingEnabled Instructs the framework to track the original value and object identity for this DataContext.

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Methods

  Name Description
Public methodSupported by Silverlight for Windows Phone CreateDatabase Creates a database.
Public methodSupported by Silverlight for Windows Phone DatabaseExists Determines whether the associated database can be opened.
Public methodSupported by Silverlight for Windows Phone DeleteDatabase Deletes the associated database.
Public methodSupported by Silverlight for Windows Phone Dispose() Releases all resources used by the DataContext.
Protected methodSupported by Silverlight for Windows Phone Dispose(Boolean) Releases resources used by the DataContext.
Public methodSupported by Silverlight for Windows Phone Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone ExecuteDynamicDelete Called inside delete override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for delete operations.
Protected methodSupported by Silverlight for Windows Phone ExecuteDynamicInsert Called inside insert override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for insert operations.
Protected methodSupported by Silverlight for Windows Phone ExecuteDynamicUpdate Called inside update override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for update operations.
Protected methodSupported by Silverlight for Windows Phone 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.)
Public methodSupported by Silverlight for Windows Phone GetChangeSet Provides access to the modified objects tracked by DataContext.
Public methodSupported by Silverlight for Windows Phone GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone GetTable(Type) Returns a collection of objects of a particular type, where the type is defined by the type parameter.
Public methodSupported by Silverlight for Windows Phone GetTable<TEntity>() Returns a collection of objects of a particular type, where the type is defined by the TEntity parameter.
Public methodSupported by Silverlight for Windows Phone GetType Gets the Type of the current instance. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows Phone MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows Phone Refresh(RefreshMode, IEnumerable) Refreshes a collection of entity objects according to the specified mode.
Public methodSupported by Silverlight for Windows Phone Refresh(RefreshMode, Object) Refreshes an entity object according to the specified mode.
Public methodSupported by Silverlight for Windows Phone Refresh(RefreshMode, array<Object[]) Refreshes an array of entity objects according to the specified mode.
Public methodSupported by Silverlight for Windows Phone SubmitChanges() Computes the set of modified objects to be inserted, updated, or deleted, and executes the appropriate commands to implement the changes to the database.
Public methodSupported by Silverlight for Windows Phone SubmitChanges(ConflictMode) Sends changes that were made to retrieved objects to the underlying database, and specifies the action to be taken if the submission fails.
Public methodSupported by Silverlight for Windows Phone ToString Returns a string that represents the current object. (Inherited from Object.)

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Extension Methods

  Name Description
Public Extension MethodSupported by Silverlight for Windows Phone CreateDatabaseSchemaUpdater Creates a DatabaseSchemaUpdater object based on the specified data context. (Defined by Extensions.)

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Remarks

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

Topic Location
External Mapping Reference (LINQ to SQL) LINQ to SQL
Frequently Asked Questions (LINQ to SQL) LINQ to SQL
ADO.NET and LINQ to SQL LINQ to SQL
Object States and Change-Tracking (LINQ to SQL) LINQ to SQL
How to: Reuse a Connection Between an ADO.NET Command and a DataContext (LINQ to SQL) LINQ to SQL
How to: Connect to a Database (LINQ to SQL) LINQ to SQL
Object Identity (LINQ to SQL) LINQ to SQL
External Mapping Reference (LINQ to SQL) LINQ to SQL
Frequently Asked Questions (LINQ to SQL) LINQ to SQL
ADO.NET and LINQ to SQL LINQ to SQL
Object States and Change-Tracking (LINQ to SQL) LINQ to SQL
How to: Reuse a Connection Between an ADO.NET Command and a DataContext (LINQ to SQL) LINQ to SQL
How to: Connect to a Database (LINQ to SQL) LINQ to SQL
Object Identity (LINQ to SQL) 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.

See Also

Reference

System.Data.Linq Namespace