DataService<T> Class

Artigo
05/29/2013

The main entry point for developing an Open Data Protocol (OData) data service by using WCF Data Services.

Inheritance Hierarchy

System.Object
System.Data.Services.DataService<T>

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

Syntax

'Declaration
<AspNetCompatibilityRequirementsAttribute(RequirementsMode := AspNetCompatibilityRequirementsMode.Allowed)> _
<ServiceBehaviorAttribute(InstanceContextMode := InstanceContextMode.PerCall)> _
Public Class DataService(Of T) _
    Implements IRequestHandler
'Usage
Dim instance As DataService(Of T)

[AspNetCompatibilityRequirementsAttribute(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
[ServiceBehaviorAttribute(InstanceContextMode = InstanceContextMode.PerCall)]
public class DataService<T> : IRequestHandler

[AspNetCompatibilityRequirementsAttribute(RequirementsMode = AspNetCompatibilityRequirementsMode::Allowed)]
[ServiceBehaviorAttribute(InstanceContextMode = InstanceContextMode::PerCall)]
generic<typename T>
public ref class DataService : IRequestHandler

[<AspNetCompatibilityRequirementsAttribute(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)>]
[<ServiceBehaviorAttribute(InstanceContextMode = InstanceContextMode.PerCall)>]
type DataService<'T> =  
    class 
        interface IRequestHandler 
    end

JScript does not support generic types and methods.

Type Parameters

T
Type that defines the data service.

The DataService<T> type exposes the following members.

Constructors

	Name	Description
	DataService<T>	Creates a new data service that deploys data of the type indicated by the template class.

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Properties

	Name	Description
	CurrentDataSource	Gets the data source instance currently being used to process the request.
	ProcessingPipeline	Gets an object that defines the events for the data service processing pipeline.

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Methods

	Name	Description
	AttachHost	Attaches the data service host to the data service identified by the parameter host.
	CreateDataSource	Creates a data source of the template class that will be used by the data service.
	Equals	(Inherited from Object.)
	Finalize	(Inherited from Object.)
	GetHashCode	(Inherited from Object.)
	GetType	(Inherited from Object.)
	HandleException	Called when an exception is raised while processing a request.
	MemberwiseClone	(Inherited from Object.)
	OnStartProcessingRequest	Called before processing each request. For batch requests, it is called one time for the top batch request and one time for each operation in the batch.
	ProcessRequest	Processes an HTTP request.
	ProcessRequestForMessage	Processes an HTTP request.
	ToString	(Inherited from Object.)

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Remarks

The DataService<T> class does the basic integration of all components of the server system. A new data service that uses system defaults for authorization and caching is created by defining a class that derives from the DataService<T> class and by referencing a compatible data model.

The type of the DataService<T> must expose at least one property that returns an entity set that is an IQueryable<T> collection of entity types. This class must also implement the IUpdatable interface to enable updates to be made to entity resources.

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.

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