DataServiceContext.BeginExecute<TElement> Method (Uri, AsyncCallback, Object)
Asynchronously sends the request so that this call does not block processing while waiting for the results from the service.
Namespace: System.Data.Services.Client
Assembly: Microsoft.Data.Services.Client (in Microsoft.Data.Services.Client.dll)
Syntax
'Declaration
Public Function BeginExecute(Of TElement) ( _
requestUri As Uri, _
callback As AsyncCallback, _
state As Object _
) As IAsyncResult
'Usage
Dim instance As DataServiceContext
Dim requestUri As Uri
Dim callback As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult
returnValue = instance.BeginExecute(requestUri, _
callback, state)
public IAsyncResult BeginExecute<TElement>(
Uri requestUri,
AsyncCallback callback,
Object state
)
public:
generic<typename TElement>
IAsyncResult^ BeginExecute(
Uri^ requestUri,
AsyncCallback^ callback,
Object^ state
)
member BeginExecute :
requestUri:Uri *
callback:AsyncCallback *
state:Object -> IAsyncResult
JScript does not support generic types and methods.
Type Parameters
- TElement
The type returned by the query.
Parameters
- requestUri
Type: System.Uri
The URI to which the query request will be sent. The URI may be any valid data service URI; it can contain $ query parameters.
- callback
Type: System.AsyncCallback
Delegate to invoke when results are available for client consumption.
- state
Type: System.Object
User-defined state object passed to the callback.
Return Value
Type: System.IAsyncResult
An object that is used to track the status of the asynchronous operation.
Remarks
The returned IAsyncResult object is used to determine when the asynchronous operation has completed. For more information, see Asynchronous Operations (WCF Data Services).
The method BeginExecute uses the same semantics as Execute, however this method asynchronously sends the request so that this call does not block processing while waiting for the results from the service. According to the standard begin-end asynchronous pattern, the provided callback is invoked when query results are retrieved.
See Also
Reference
System.Data.Services.Client Namespace
Other Resources
How to: Execute Asynchronous Data Service Queries (WCF Data Services)