DataContext Class

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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
	DataContext(String)	Initializes a new instance of the DataContext class by referencing a file source.
	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
	ChangeConflicts	Returns a collection of objects that caused concurrency conflicts when SubmitChanges was called.
	DeferredLoadingEnabled	Specifies whether to delay-load one-to-many or one-to-one relationships.
	LoadOptions	Gets or sets the DataLoadOptions associated with this DataContext.
	Log	Specifies the destination to write the SQL query or command.
	Mapping	Returns the MetaModel on which the mapping is based.
	ObjectTrackingEnabled	Instructs the framework to track the original value and object identity for this DataContext.

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Methods

	Name	Description
	CreateDatabase	Creates a database.
	DatabaseExists	Determines whether the associated database can be opened.
	DeleteDatabase	Deletes the associated database.
	Dispose()	Releases all resources used by the DataContext.
	Dispose(Boolean)	Releases resources used by the DataContext.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	ExecuteDynamicDelete	Called inside delete override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for delete operations.
	ExecuteDynamicInsert	Called inside insert override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for insert operations.
	ExecuteDynamicUpdate	Called inside update override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for update operations.
	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.)
	GetChangeSet	Provides access to the modified objects tracked by DataContext.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetTable(Type)	Returns a collection of objects of a particular type, where the type is defined by the type parameter.
	GetTable<TEntity>()	Returns a collection of objects of a particular type, where the type is defined by the TEntity parameter.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Refresh(RefreshMode, IEnumerable)	Refreshes a collection of entity objects according to the specified mode.
	Refresh(RefreshMode, Object)	Refreshes an entity object according to the specified mode.
	Refresh(RefreshMode, array<Object[])	Refreshes an array of entity objects according to the specified mode.
	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.
	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.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Extension Methods

	Name	Description
	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