Read a set of items with the items identified by the server handle that was returned in a previous AddItems call.
The item values are read by executing an asynchronous read and returned to the user as an argument of the completion handler.
Overload List
| Overload | Description |
|---|---|
| Read(Int32[],Object,OnBGGrpRead) | Available in the OPCDA.NET Professional Edition only. Read a set of items with the items identified by the server handle that was returned in a previous AddItems call. The item values are read by executing an asynchronous read and returned to the user as an argument of the completion handler. |
| Read(ItemIdentification[],Object,OnBGGrpRead) | Available in the OPCDA.NET Professional Edition only. Read a set of items with the items identified either by the fully qualified item ID or by the server handle that was returned in a previous AddItems call. If an item is specified by the item id and it does not yet exist in the BGGroup internal list of added items then the item is added by executin AddItems. The item values are read by executing an asynchronous read and returned to the user as an argument of the completion handler. |