XML-DA method to asynchronously read a set of item values from an XML-DA or OPC-DA server.
Syntax
Parameters
- asyncResult
- The reference to the pending asynchronous request to wait for.
- RItemList
- A container with an arrrya of item elements and their value information.
It is expected that there are one or more Item elements per RItemList.
The ReadResponse will maintain the Item order in the Read request.
If an item is write-only the server will return E_WRITEONLY in the response for this item.
The response will provide no value element for the affected item.
- Errors
- An array of OPCError elements with the description of the errors occured in this server call.
Errors are only present if Items contain result codes.
Return Value
Container of information that represents the basic information for most responses.
Requirements
Target Platforms:Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows 7, Windows Server 2008 family
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See Also