ua.filestream.TuaByteStringStream

A stream class to read and write files to and from an OPC UA Server.

Delphi

TuaByteStringStream = class(TBytesStream);

C++

class TuaByteStringStream : public TBytesStream;

Description

TuaByteStringStream is a TBytesStream class extended to read and write files to and from an OPC UA Server.

In addition to the TBytesStream class, TuaByteStringStream has the LoadFromOPCServer and SaveToOPCServer methods.

Example

Copy Code

program OPCFileStream; {$APPTYPE CONSOLE} {$R *.res} uses sysutils, ua.client, ua.filestream; var OPCClient: TdOPCUaClient; ByteStringStream : TuaByteStringStream; begin OPCClient := TdOPCUaClient.Create(nil); ByteStringStream := TuaByteStringStream.Create; OPCClient.Url := 'opc.tcp://opcuaserver.com:48010'; try OPCClient.Active := true; Writeln('connected.'); ByteStringStream.LoadFromOPCServer(OPCClient,'ns=2;s=Demo.Files.serverconfig.xml'); Writeln('File loaded from OPC server.'); ByteStringStream.SaveToFile('c:\\aa\serverconfig.xml'); Writeln('File saved on the locale computer.'); OPCClient.Active := false; except on E: Exception do Writeln(E.ClassName, ': ', E.Message); end; Writeln('Press enter to exit'); OPCClient.Free; readln; end.

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