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// MFDev - 03/2006 - v0.8
// Gestion du BDE
UNIT BdeInit;
INTERFACE
uses
SysUtils, StrUtils, Dialogs, Forms, Registry, Windows, Classes, DbTables;
function Test_BDE(sDirEXE: string; Table: TTable): boolean;
IMPLEMENTATION
const
csBDEDir = 'SOFTWARE\Borland\Database Engine'; // HKLM
csBDEDirFormat = 'Software\Borland\Database Engine\Settings\System\FORMATS';
csBDEDirDriver = 'Software\Borland\Database Engine\Settings\DRIVERS\PARADOX';
csNetDir = 'NET DIR';
csCfg = 'IDAPI32.CFG';
csHKU = 'HKU';
// write Key in Registry
function bWriteStringReg(const csRoot, csClef, csSection: string; sValeur: string): boolean;
var
Reg: TRegistry;
begin
// ex: bEcrireString('\Demarrage', 'Tranche', sChaine)
Result := false;
Reg := TRegistry.Create;
TRY
if csRoot <> csHKU then
Reg.RootKey := HKEY_LOCAL_MACHINE;
// true pour la créer si elle n'existe pas
if Reg.OpenKey(csClef, true) then begin
Reg.WriteString(csSection, sValeur);
Result := true;
end;
FINALLY
Reg.CloseKey;
Reg.Free;
END;
end;
// Exist BDE in Registry
function BDEExist: boolean;
var
Reg: TRegistry;
sFileIdapi: string;
begin
Result := false;
Reg := TRegistry.Create;
with Reg do begin
RootKey := HKEY_LOCAL_MACHINE;
OpenKey('SOFTWARE\Borland\Database Engine', False);
TRY
sFileIdapi := ReadString('CONFIGFILE01');
// BDE installed
if sFileIdapi <> '' then begin
if FileExists(sFileIdapi) then
Result := true;
// force NetDir = Dir BDE
sFileIdapi := ReadString('DLLPATH');
bWriteStringReg('', csBDEDirDriver + '\INIT', csNetDir, sFileIdapi);
end;
FINALLY
CloseKey;
Free;
END;
end; // with
end;
// Init Registry
function BDE_Init(sDir: string): boolean;
begin
Session.NetFiledir := sDir; // sNetDir;
TRY
bWriteStringReg('', csBDEDir, 'DLLPATH', sDir);
bWriteStringReg('', csBDEDir, 'CONFIGFILE01', sDir + '\' + csCfg);
bWriteStringReg('', csBDEDir, 'SAVECONFIG', 'WIN31');
bWriteStringReg('', csBDEDir, 'UseCount', '1');
bWriteStringReg('', csBDEDir, 'RESOURCE', '000C');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'LOCAL SHARE', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'VERSION', '3.0');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'MINBUFSIZE', '512');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'MAXBUFSIZE', '4096');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'LANGDRIVER', 'intl');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'MAXFILEHANDLES', '48');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'SYSFLAGS', '0');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'LOW MEMORY USAGE LIMIT', '64');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'AUTO ODBC', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'DEFAULT DRIVER', 'PARADOX');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'SHAREDMEMSIZE', '4096');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'SHAREDMEMLOCATION', '');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'DATA REPOSITORY', '');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'MEMSIZE', '32');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'SQLQRYMODE', '');
bWriteStringReg('', csBDEDirFormat + '\INIT', 'MTS POOLING', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'MTS POOLING', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'SEPARATOR', '/');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'MODE', '1');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'FOURDIGITYEAR', 'TRUE');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'YEARBIASED', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'LEADINGZEROM', 'TRUE');
bWriteStringReg('', csBDEDirFormat + '\DATE', 'LEADINGZEROD', 'TRUE');
bWriteStringReg('', csBDEDirFormat + '\TIME', 'TWELVEHOUR', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\TIME', 'AMSTRING', 'AM');
bWriteStringReg('', csBDEDirFormat + '\TIME', 'PMSTRING', 'PM');
bWriteStringReg('', csBDEDirFormat + '\TIME', 'SECONDS', 'TRUE');
bWriteStringReg('', csBDEDirFormat + '\TIME', 'MILSECONDS', 'FALSE');
bWriteStringReg('', csBDEDirFormat + '\NUMBER', 'DECIMALSEPARATOR', '.');
bWriteStringReg('', csBDEDirFormat + '\NUMBER', 'THOUSANDSEPARATOR', '.');
bWriteStringReg('', csBDEDirFormat + '\NUMBER', 'DECIMALDIGITS', '2');
bWriteStringReg('', csBDEDirFormat + '\NUMBER', 'LEADINGZERON', 'TRUE');
bWriteStringReg('', csBDEDirDriver + '\INIT', csNetDir, sDir);
bWriteStringReg('', csBDEDirDriver + '\INIT', 'VERSION', '3.0');
bWriteStringReg('', csBDEDirDriver + '\INIT', 'TYPE', 'FILE');
bWriteStringReg('', csBDEDirDriver + '\INIT', 'LANGDRIVER', 'intl');
bWriteStringReg('', csBDEDirDriver + '\TABLE CREATE', 'LEVEL', '4');
bWriteStringReg('', csBDEDirDriver + '\TABLE CREATE', 'BLOCK SIZE', '4096');
bWriteStringReg('', csBDEDirDriver + '\TABLE CREATE', 'FILL FACTOR', '95');
bWriteStringReg('', csBDEDirDriver + '\TABLE CREATE', 'STRICTINTEGRTY', 'TRUE');
Result := true;
EXCEPT
Result := false;
END;
end;
// Install BDE Default
// disk:
// \
// |
// Dir x
// |
// |- Rep EXE
// |- Rep BDE
function VerifBDE(const sDirExe, sAlias: string): boolean;
var
i: integer;
sDirBde: string;
Opendialog: TOpenDialog;
begin
Result := false;
if not BDEExist then begin
if Length(sDirExe) > 3 then begin
for i := Length(sDirEXE) - 1 downto 1 do begin
if Copy(sDirEXE, i, 1) <> '\' then
Continue;
sDirBde := Copy(sDirEXE, 1, i); // rep -1
Break;
end;
end
else
sDirBde := sDirExe;
sDirBde := sDirBde + 'DBD\';
TRY
ChDir(sDirBde);
EXCEPT
on E:EInOutError do begin
ShowMessage('STOP: Moteur de bases de données non trouvé. Définir le chemin...');
OpenDialog := TOpenDialog.Create(nil);
with OpenDialog do begin
InitialDir := sDirExe;
Filter := ' Fichiers config BDE|' + csCfg;
Title := 'Sélectionner le Fichier Config du BDE: ' + csCfg;
if OpenDialog.Execute then begin
sDirBde := FileName;
OpenDialog.Free;
// Extrait Dir BDE
i := PosEx('\', sDirBde, Length(sDirBde) - Length(csCfg) - 1);
if i > 3 then
sDirBde := Copy(sDirBde, 1, i); // rep BDE
end
else begin
OpenDialog.Free;
Exit;
end;
end; // with
end; // on
END;
TRY
ChDir(sDirBde);
EXCEPT
on E:EInOutError do
Exit;
END;
if IOResult = 0 then // Dir existe
sDirBde := GetCurrentDir;
if not FileExists(sDirBde + '\' + csCfg) then begin
// a priori BDE inexistant
ShowMessage('STOP: Moteur de bases de données non trouvé. L''application ne peut continuer...');
Exit;
end;
// BDE trouvé, màj Base de Registre
if BDE_Init(sDirBde) then // init Dir BDE
ShowMessage('Moteur de Base de Données inialisé ...');
ChDir(sDirEXE); // restore Dir demarrage EXE
end; // if
Result := true;
end;
// Test BDE Registry
function BDE_Exist: boolean;
var
Reg: TRegistry;
sFileIdapi: string;
begin
Result := false;
Reg := TRegistry.Create;
with Reg do begin
RootKey := HKEY_LOCAL_MACHINE;
OpenKey(csBDEDir, false);
TRY
sFileIdapi := ReadString('CONFIGFILE01');
// BDE installed
if sFileIdapi <> '' then begin
if FileExists(sFileIdapi) then
Result := true;
// force NetDir = Dir du BDE
sFileIdapi := ReadString('DLLPATH');
bWriteStringReg('', csBDEDirDriver + '\INIT', csNetDir, sFileIdapi);
end;
FINALLY
CloseKey;
END;
end; // with
end;
// Test, clear, delete, create Alias
function InitAlias(Session: TSession; csTypeTable: string; Table: TTable; var sBDDir: string): boolean;
var
sAlias: string;
begin
Result := false;
sAlias := Table.DatabaseName; // Alias
with Session do begin
if IsAlias(sAlias) then begin // Exist = delete
DeleteAlias(sAlias);
SaveConfigFile;
end;
ConfigMode := cmAll;
if not IsAlias(sAlias) then begin // création
AddStandardAlias(sAlias, sBDDir, csTypeTable); // crée en memoire le nouvel Alias
end;
SaveConfigFile;
end; // with
TRY
// vérification
Table.Open;
Table.Close;
Result := true;
EXCEPT
on E:EDBEngineError do
if (E.Errors[0].ErrorCode = 11011) then begin
ShowMessage('Les bases de données n''existent pas dans <' + sAlias + '>. Application indisponible !');
end;
END;
end;
function Test_BDE(sDirEXE: string; Table: TTable): boolean;
var
i: integer;
sBDDir: string;
Opendialog: TOpenDialog;
begin
Result := false;
TRY
Table.Open;
EXCEPT
// vérif si BDE installé
if not VerifBDE(sDirExe, Table.DataBaseName) then begin
ShowMessage('Moteur Base de donnée non trouvé ... cela ne sert à rien de continuer !');
Exit;
end;
END;
sBDDir := sDirExe;
if not FileExists(sDirExe + Table.TableName) then begin
OpenDialog := TOpenDialog.Create(nil);
with OpenDialog do begin
InitialDir := sDirExe;
Filter := ' Fichiers Base de donnée|' + Table.TableName;
Title := 'Sélectionner la Base de donnée: ' + Table.TableName;
if OpenDialog.Execute then begin
sBDDir := FileName;
OpenDialog.Free;
i := PosEx('\', sBDDir, Length(sBDDir) - Length(Table.TableName) - 1);
if i > 3 then
sBDDir := Copy(sBDDir, 1, i); // rep BDE
end
else begin
OpenDialog.Free;
ShowMessage('BD inaccessible. Terminé');
Exit;
end;
end; // with
end;
ChDir(sBDDir);
sBDDir := GetCurrentDir; // format standard
if not InitAlias(Session, 'PARADOX', Table, sBDDir) then begin
ShowMessage('Impossible de trouver les Bases de données ... cela ne sert à rien de continuer !');
Exit;
end; // if
Result := true;
end;
END. |
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