This synchronous function creates a new OPCHDA_BROWSER object. The filters will be applied to all
method calls to this instance of the browser. The server is expected to validate the filter
arrays. The server must support a single client having simultaneous access to multiple browse
interfaces. Filtering is optional behavior for a server. If a server does not support filtering,
or only supports filtering on some of the requested attributes, the server shall return an
interface to a browser which is only filtered on the accepted attributes. A server which does
not support filtering shall return a pointer to an unfiltered browser interface. Filter
operations are additive. To successfully pass filter criteria, the item must successfully
satisfy all of the filter criteria. Implementation of filtering and browsing is server specific,
however it is anticipated that servers with hierarchical name spaces may only apply filters to
leaves, causing them to return branches which have no leaves which satisfy the criteria. It is
anticipated that a client may create one browser to locate a particular area of the hierarchy,
obtain a fully qualified branch name using GetBranchPosition, then pass that branch name to
another browser which is using a different filter set. Servers may optionally support wild
cards for string filters. To represent a single character the “?” shall be used. To represent
multiple characters the “*” shall be used.
Syntax
Parameters
- filter
- The filter definitions.
- browser
- OUT: Created browser object
- errors
- OUT: Reports the validity of the filtering inputs.
Return Value
S_OK, OPC_W_NOFILTER, OPC_E_UNKNOWNATTRID, OPC_E_INVALIDDATATYPE, E_INVALIDARG, E_FAIL
Requirements
Target Platforms: Windows 7/8/10, Windows Server 2008/2012/2016, .NET 4.x
See Also