MSDN Library

DataServiceContext.BeginExecuteBatch Method

Asynchronously submits a group of queries as a batch to the data service.

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

Public Function BeginExecuteBatch ( _
	callback As AsyncCallback, _
	state As Object, _
	ParamArray queries As DataServiceRequest() _
) As IAsyncResult
Dim instance As DataServiceContext 
Dim callback As AsyncCallback 
Dim state As Object 
Dim queries As DataServiceRequest()
Dim returnValue As IAsyncResult 

returnValue = instance.BeginExecuteBatch(callback, _
	state, queries)


Type: System.AsyncCallback
The delegate that is called when a response to the batch request is received.
Type: System.Object
User-defined state object that is used to pass context data to the callback method.
Type: System.Data.Services.Client.DataServiceRequest()
The array of query requests to include in the batch request.

Return Value

Type: System.IAsyncResult
An IAsyncResult object that is used to track the status of the asynchronous operation.

The returned IAsyncResult object is used to determine when the asynchronous operation has completed. For more information, see Asynchronous Operations (WCF Data Services).

The queries are specified as DataServiceRequest(Of TElement) instances. Returns a DataServiceResponse that represents the response of the batch request as a whole. Individual query responses are represented as DataServiceResponse objects that can be accessed by enumerating the DataServiceResponse instance.

When this method returns, all of the HTTP response for the batch request has been read from the network stream but the responses have not been processed. No identity resolution or object materialization occurs for a specified entity in the response until it is enumerated.

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