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FireDAC.Comp.Client.TFDCustomConnection.CliHandle

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Delphi

property CliHandle: Pointer read GetCliHandle;

C++

__property void * CliHandle = {read=GetCliHandle};

Properties

Type Visibility Source Unit Parent
property public
FireDAC.Comp.Client.pas
FireDAC.Comp.Client.hpp
FireDAC.Comp.Client TFDCustomConnection

Description

CLI handle for connection sharing.

The CliHandle property returns a DBMS Call Level Interface connection handle. This value can be assigned to another SharedCliHandle property of an TFDCustomConnection object. This is useful to transfer a connection from an application into a DLL. See DLL Development

After setting Connected to True for the DLL connection, both connections will share the same physical DBMS connection. This connection must be closed after all other connections that share the same CLI handle.

Example

//Application code (without checks):
FhDll := LoadLibrary(PChar('Project2.dll'));
@FpShowData := GetProcAddress(FhDll, PChar('ShowData'));
FpShowData(FDConnection1.CliHandle);

//DLL code:
procedure ShowData(ACliHandle: LongWord);
begin
  FDConnection1.SharedCliHandle := ACliHandle;
  FDConnection1.Connected := True;
  FDQuery1.Active := True;
end;

See Also

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