dOPCDA.TdOPCDAClient.OPCConnection

returns the interface of the underlying connection

Delphi

function OPCConnection: IdOPCDAConnection;

C++

__fastcall IdOPCDAConnection OPCConnection();

Description

Depending on the connection type (UA, COM or XML) you get the interface for underlying connection. You get only a right value back if you are connected to the server.

The example below shows you how to get the underlying OPC UA connection TdOPCUAClient object.

Example

Copy Code

function GetOPCUAClient(DaClient: TdOPCDAClient): TdOPCUAClient; var Connection: TObject; begin if DaClient.OPCConnection <> nil then begin Connection := DaClient.OPCConnection.GetObject; // ticky: get underlying connection object if (Connection <> nil) and (Connection is TdOPCUAConnection) then result := TdOPCUAConnection(Connection).uaClient else raise Exception.Create('connection is not a opc ua server connection'); end else raise Exception.Create('first connect to opc ua server'); end;

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