DataContext Class

May 11, 2014

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

System.Object
  System.Data.Linq.DataContext

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

public class DataContext : IDisposable

The DataContext type exposes the following members.

  NameDescription
Public methodDataContext(String)Initializes a new instance of the DataContext class by referencing a file source.
Public methodDataContext(String, MappingSource)Initializes a new instance of the DataContext class by referencing a file source and a mapping source.
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  NameDescription
Public propertyChangeConflictsReturns a collection of objects that caused concurrency conflicts when SubmitChanges was called.
Public propertyDeferredLoadingEnabledSpecifies whether to delay-load one-to-many or one-to-one relationships.
Public propertyLoadOptionsGets or sets the DataLoadOptions associated with this DataContext.
Public propertyLogSpecifies the destination to write the SQL query or command.
Public propertyMappingReturns the MetaModel on which the mapping is based.
Public propertyObjectTrackingEnabledInstructs the framework to track the original value and object identity for this DataContext.
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  NameDescription
Public methodCreateDatabaseCreates a database.
Public methodDatabaseExistsDetermines whether the associated database can be opened.
Public methodDeleteDatabaseDeletes the associated database.
Public methodDispose()Releases all resources used by the DataContext.
Protected methodDispose(Boolean)Releases resources used by the DataContext.
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodExecuteDynamicDeleteCalled inside delete override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for delete operations.
Protected methodExecuteDynamicInsertCalled inside insert override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for insert operations.
Protected methodExecuteDynamicUpdateCalled inside update override methods to redelegate to LINQ to SQL the task of generating and executing dynamic SQL for update operations.
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetChangeSetProvides access to the modified objects tracked by DataContext.
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTable(Type)Returns a collection of objects of a particular type, where the type is defined by the type parameter.
Public methodGetTable<TEntity>()Returns a collection of objects of a particular type, where the type is defined by the TEntity parameter.
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodRefresh(RefreshMode, IEnumerable)Refreshes a collection of entity objects according to the specified mode.
Public methodRefresh(RefreshMode, Object)Refreshes an entity object according to the specified mode.
Public methodRefresh(RefreshMode, Object[])Refreshes an array of entity objects according to the specified mode.
Public methodSubmitChanges()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 methodSubmitChanges(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 methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public Extension MethodCreateDatabaseSchemaUpdaterCreates a DatabaseSchemaUpdater object based on the specified data context. (Defined by Extensions.)
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Windows Phone OS

Supported in: 8.1, 8.0

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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