Изменение конфигурации IDAPI

Возможно ли установить параметр MAXFILEHANDLES в IDAPI.CFG посредством Delphi?

Да. Следующий компонент показывает как это можно сделать (а также изменить другие параметры):

unit CFGTOOL;
interface
uses SysUtils, Classes, DB, DbiProcs, DbiTypes, DbiErrs;
type TBDEConfig = class(TComponent) private

FLocalShare : Boolean; FMinBufSize : Integer; FMaxBufSize : Integer; FSystemLangDriver : String; FParadoxLangDriver : String; FMaxFileHandles : Integer; FNetFileDir : String; FTableLevel : String; FBlockSize : Integer; FDefaultDriver : String; FStrictIntegrity : Boolean; FAutoODBC : Boolean;
procedure Init; procedure SetLocalShare(Value : Boolean); procedure SetMinBufSize(Value : Integer); procedure SetMaxBufSize(Value : Integer); procedure SetSystemLangDriver(Value : String); procedure SetParadoxLangDriver(Value : String); procedure SetMaxFileHandles(Value : Integer); procedure SetNetFileDir(Value : String); procedure SetTableLevel(Value : String); procedure SetBlockSize(Value : Integer); procedure SetDefaultDriver(Value : String); procedure SetAutoODBC(Value : Boolean); procedure SetStrictIntegrity(Value : Boolean); procedure UpdateCFGFile( path, item, value : string);
protected
public constructor Create(AOwner: TComponent); override; destructor Destroy; override; published property LocalShare : Boolean read FLocalShare write SetLocalShare; property MinBufSize : Integer read FMinBufSize write SetMinBufSize; property MaxBufSize : Integer read FMaxBufSize write SetMaxBufSize; property SystemLangDriver : String read FSystemLangDriver write SetSystemLangDriver; property ParadoxLangDriver : String read FParadoxLangDriver write SetParadoxLangDriver; property MaxFileHandles : Integer read FMaxFileHandles write SetMaxFileHandles; property NetFileDir : String read FNetFileDir write SetNetFileDir; property TableLevel : String read FTableLevel write SetTableLevel; property BlockSize : Integer read FBlockSize write SetBlockSize; property DefaultDriver : string read FDefaultDriver write SetDefaultDriver; property AutoODBC : Boolean read FAutoODBC write SetAutoODBC; property StrictIntegrity : Boolean read FStrictIntegrity write SetStrictIntegrity;
end;
procedure Register;
implementation
function StrToBoolean( Value : string) : Boolean; begin if (UpperCase(Value) = 'TRUE') or (UpperCase(Value) = 'ON') or (UpperCase(Value) = 'YES') or (UpperCase(Value) = '.T.' ) then Result := True else Result := False; end;
function BooleanToStr( Value : Boolean) : String; begin if Value then Result := 'TRUE' else Result := 'FALSE'; end;
procedure Register; begin RegisterComponents('Data Access', [TBDEConfig]); end;
procedure TBDEConfig.Init; var h: hDBICur; pCfgDes: pCFGDesc; n, v : string; begin Check(DbiOpenCfgInfoList(nil, dbiREADWRITE, cfgPersistent,'\SYSTEM\INIT', h)); GetMem(pCfgDes, sizeof(CFGDesc)); try FillChar(pCfgDes^, sizeof(CFGDesc), #0); while (DbiGetNextRecord(h, dbiWRITELOCK, pCfgDes, nil) = DBIERR_NONE) do begin n := StrPas(pCfgDes^.szNodeName); v := StrPas(pCfgDes^.szValue); if n = 'LOCAL SHARE' then FLocalShare := StrToBoolean(v) else if n = 'MINBUFSIZE' then FMinBufSize := StrToInt(v) else if n = 'MAXBUFSIZE' then FMaxBufSize := StrToInt(v) else if n = 'MAXFILEHANDLES' then FMaxFileHandles := StrToInt(v) else if n = 'LANGDRIVER' then FSystemLangDriver := v else if n = 'AUTO ODBC' then FAutoODBC := StrToBoolean(v) else if n = 'DEFAULT DRIVER' then FDefaultDriver := v; end; if (h <> nil) then DbiCloseCursor(h); Check(DbiOpenCfgInfoList(nil, dbiREADWRITE, cfgPersistent,'\DRIVERS\PARADOX\INIT', h)); FillChar(pCfgDes^, sizeof(CFGDesc), #0); while (DbiGetNextRecord(h, dbiWRITELOCK, pCfgDes, nil) = DBIERR_NONE) do begin n := StrPas(pCfgDes^.szNodeName); v := StrPas(pCfgDes^.szValue); if n = 'NET DIR' then FNetFileDir := v else if n = 'LANGDRIVER' then FParadoxLangDriver := v; end; if (h <> nil) then DbiCloseCursor(h); Check(DbiOpenCfgInfoList(nil, dbiREADWRITE, cfgPersistent,'\DRIVERS\PARADOX\TABLE CREATE', h)); FillChar(pCfgDes^, sizeof(CFGDesc), #0); while (DbiGetNextRecord(h, dbiWRITELOCK, pCfgDes, nil) = DBIERR_NONE) do begin n := StrPas(pCfgDes^.szNodeName); v := StrPas(pCfgDes^.szValue); if n = 'LEVEL' then FTableLevel := v else if n = 'BLOCK SIZE' then FBlockSize := StrToInt(v) else if n = 'STRICTINTEGRITY' then FStrictIntegrity := StrToBoolean(v); end; finally FreeMem(pCfgDes, sizeof(CFGDesc)); if (h <> nil) then DbiCloseCursor(h); end; end;
procedure TBDEConfig.SetLocalShare(Value : Boolean); begin UpdateCfgFile('\SYSTEM\INIT','LOCAL SHARE',BooleanToStr(Value)); FLocalShare := Value; end;
procedure TBDEConfig.SetMinBufSize(Value : Integer); begin UpdateCfgFile('\SYSTEM\INIT','MINBUFSIZE',IntToStr(Value)); FMinBufSize := Value; end;
procedure TBDEConfig.SetMaxBufSize(Value : Integer); begin UpdateCfgFile('\SYSTEM\INIT','MAXBUFSIZE',IntToStr(Value)); FMaxBufSize := Value; end;
procedure TBDEConfig.SetSystemLangDriver(Value : String); begin UpdateCfgFile('\SYSTEM\INIT','LANGDRIVER',Value); FSystemLangDriver := Value; end;
procedure TBDEConfig.SetParadoxLangDriver(Value : String); begin UpdateCfgFile('\DRIVERS\PARADOX\INIT','LANGDRIVER',Value); FParadoxLangDriver := Value; end;
procedure TBDEConfig.SetMaxFileHandles(Value : Integer); begin UpdateCfgFile('\SYSTEM\INIT','MAXFILEHANDLES',IntToStr(Value)); FMaxFileHandles := Value; end;
procedure TBDEConfig.SetNetFileDir(Value : String); begin UpdateCfgFile('\DRIVERS\PARADOX\INIT','NET DIR',Value); FNetFileDir := Value; end;
procedure TBDEConfig.SetTableLevel(Value : String); begin UpdateCfgFile('\DRIVERS\PARADOX\TABLE CREATE','LEVEL',Value); FTableLevel := Value; end;
procedure TBDEConfig.SetBlockSize(Value : Integer); begin UpdateCfgFile('\DRIVERS\PARADOX\TABLE CREATE','BLOCK SIZE',IntToStr(Value)); FBlockSize := Value; end;
procedure TBDEConfig.SetStrictIntegrity(Value : Boolean); begin UpdateCfgFile('\DRIVERS\PARADOX\TABLE CREATE','STRICTINTEGRITY',BooleanToStr(Value)); FStrictIntegrity := Value; end;
procedure TBDEConfig.SetDefaultDriver(Value : String); begin UpdateCfgFile('\SYSTEM\INIT','DEFAULT DRIVER',Value); FDefaultDriver := Value; end;
procedure TBDEConfig.SetAutoODBC(Value : Boolean); begin UpdateCfgFile('\SYSTEM\INIT','AUTO ODBC',BooleanToStr(Value)); FAutoODBC := Value; end;
procedure TBDEConfig.UpdateCFGFile; var h : hDbiCur; pCfgDes: pCFGDesc; pPath : array[0..127] of char; begin StrPCopy(pPath,Path); Check(DbiOpenCfgInfoList(nil, dbiREADWRITE, cfgPersistent, pPath, h)); GetMem(pCfgDes, sizeof(CFGDesc)); try FillChar(pCfgDes^, sizeof(CFGDesc), #0); while (DbiGetNextRecord(h, dbiWRITELOCK, pCfgDes, nil) = DBIERR_NONE) do begin if StrPas(pCfgDes^.szNodeName) = item then begin StrPCopy(pCfgDes^.szValue,value); Check(DbiModifyRecord(h,pCfgDes,True)); end; end; finally FreeMem(pCfgDes, sizeof(CFGDesc)); if (h <> nil) then DbiCloseCursor(h); end; end;
constructor TBDEConfig.Create(AOwner: TComponent); begin inherited Create(AOwner); Init; end;
destructor TBDEConfig.Destroy; begin inherited Destroy; end;
end.

- Eryk Bottomley [001055]

Содержание раздела