'Declaration Protected MustOverride Function BeginExecuteDataQuery( _ ByVal queryParameters As DataQueryParameters, _ ByVal callback As AsyncCallback, _ ByVal state As Object _ ) As IAsyncResult
'Usage Dim instance As AsyncDataSourceProvider Dim queryParameters As DataQueryParameters Dim callback As AsyncCallback Dim state As Object Dim value As IAsyncResult value = instance.BeginExecuteDataQuery(queryParameters, callback, state)
protected abstract IAsyncResult BeginExecuteDataQuery( DataQueryParameters queryParameters, AsyncCallback callback, object state )
Parameters
- queryParameters
- A DataQueryParameters that contains information about the operations that must be executed by the query on the underlying data source.
- callback
- The AsyncCallback delegate to be called when the operation is complete.
- state
- An object containing state information for the operation.
Return Value
An IAsyncResult representing the result of the operation.