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Table<TEntity>.AttachAll<TSubEntity> Method (IEnumerable<TSubEntity>, Boolean)

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

Attaches all entities of a collection to the DataContext in either a modified or unmodified state.

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

Syntax

'Declaration
Public Sub AttachAll(Of TSubEntity As TEntity) ( _
    entities As IEnumerable(Of TSubEntity), _
    asModified As Boolean _
)

public void AttachAll<TSubEntity>(
    IEnumerable<TSubEntity> entities,
    bool asModified
)
where TSubEntity : TEntity

Type Parameters

  • TSubEntity
    The type of entities to attach.

Parameters

  • asModified
    Type: System.Boolean
    true if the object has a timestamp or RowVersion member, false if original values are being used for the optimistic concurrency check.

Remarks

This method attaches all entities of a collection to the DataContext in either a modified or unmodified state. If attaching as modified, the entity must either declare a version member or must not participate in update conflict checking. If attaching as unmodified, the entity is assumed to represent the original value. After calling this method, the entity's fields can be modified with other information from the client before SubmitChanges is called.

When a new entity is attached, deferred loaders for any child collections (for example, EntitySet collections of entities from associated tables) are initialized. When SubmitChanges is called, members of the child collections are put into an Unmodified state. To update members of a child collection, you must explicitly call Attach and specify that entity.

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.