'Declaration
 
Protected MustOverride Function BeginExecuteCountQuery( _
   ByVal queryParameters As CountQueryParameters, _
   ByVal callback As AsyncCallback, _
   ByVal state As Object _
) As IAsyncResult

'Usage
 
Dim instance As AsyncIndexDataSourceProvider
Dim queryParameters As CountQueryParameters
Dim callback As AsyncCallback
Dim state As Object
Dim value As IAsyncResult
 
value = instance.BeginExecuteCountQuery(queryParameters, callback, state)

protected abstract IAsyncResult BeginExecuteCountQuery( 
   CountQueryParameters queryParameters,
   AsyncCallback callback,
   object state
)

Parameters

queryParameters

A CountQueryParameters 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

.NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

.NET Framework: net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

Reference

AsyncIndexDataSourceProvider Class
AsyncIndexDataSourceProvider Members