Статья
11/18/2011

DataServiceCollection<T> Constructor (DataServiceContext, String, Func<EntityChangedParams, Boolean>, Func<EntityCollectionChangedParams, Boolean>)

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Creates a new instance of the DataServiceCollection<T> class with the supplied change method delegates and that uses the specified DataServiceContext.

Namespace: System.Data.Services.Client
Assembly: System.Data.Services.Client (in System.Data.Services.Client.dll)

Syntax

'Declaration
Public Sub New ( _
    context As DataServiceContext, _
    entitySetName As String, _
    entityChangedCallback As Func(Of EntityChangedParams, Boolean), _
    collectionChangedCallback As Func(Of EntityCollectionChangedParams, Boolean) _
)

public DataServiceCollection(
    DataServiceContext context,
    string entitySetName,
    Func<EntityChangedParams, bool> entityChangedCallback,
    Func<EntityCollectionChangedParams, bool> collectionChangedCallback
)

Parameters

context
Type: System.Data.Services.Client.DataServiceContext
The DataServiceContext used to track items in the collection.

entitySetName
Type: System.String
The entity set of the objects in the collection.

entityChangedCallback
Type: System.Func<EntityChangedParams, Boolean>
A delegate that encapsulates a method that is called when an entity changes.

collectionChangedCallback
Type: System.Func<EntityCollectionChangedParams, Boolean>
A delegate that encapsulates a method that is called when the collection of entities changes.

Remarks

Use this constructor to create an empty DataServiceCollection<T> to which entity objects can be added without executing a query against the service or when an IEnumerable<T> is not available.

By default, automatic change tracking is enabled for a DataServiceCollection<T>. You can create an instance of DataServiceCollection<T> that uses manual change tracking when you create an instance using a constructor that enables you to supply a value of None for TrackingMode. When you use manual tracking, you must implement INotifyPropertyChanged and INotifyCollectionChanged and handle the raised events to manually report changes to the DataServiceContext.

Version Information

Silverlight

Supported in: 5, 4

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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