Syntax
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As Session Dim nodesToRead As IList(Of HistoryReadValueId) Dim details As ReadEventDetails Dim callback As AsyncCallback Dim userData As Object Dim value As IAsyncResult value = instance.BeginHistoryReadEvent(nodesToRead, details, callback, userData) | |
| C# | |
|---|---|
public IAsyncResult BeginHistoryReadEvent( IList<HistoryReadValueId> nodesToRead, ReadEventDetails details, AsyncCallback callback, object userData ) | |
Parameters
- nodesToRead
- List of event notifier object nodes to read event history from. Includes a continuation point to continue previous read requests.
- details
- Configuration parameters for the history read of events. Configuration parameters include - the start time of the requested time domain, - the end time of the requested time domain, - the event filter, - a limitation of the number of results per node.
- callback
- The callback to use when the async call completes.
- userData
- The user data that is passed to the callback.
Return Value
An object which must be passed to the EndHistoryReadEvent method.Requirements
Target Platforms: Windows 7/8/10, Windows Server 2003/2008/2012/2015, .NET4.x