DELPHI中操作ACCESS數(shù)據(jù)庫

2020-03-24 16:42:57

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DELPHI中操作ACCESS數(shù)據(jù)庫(建立.mdb文件,壓縮數(shù)據(jù)庫) 以下代碼在WIN2K,D6,MDAC2.6下測試通過, 編譯好的程序在WIN98第二版無ACCESS環(huán)境下運(yùn)行成功. //聲明連接字符串 Const SConnectionString = 'Provider=Microsoft.Jet.OLEDB.4.0;Data Source=%s;' +'Jet OLEDB:Database Password=%s;'; //============================================================================= // Procedure: GetTempPathFileName // Author : ysai // Date : 2003-01-27 // Arguments: (None) // Result : string //============================================================================= function GetTempPathFileName():string; //取得臨時(shí)文件名 var SPath,Sfile :array [0..254] of char; begin GetTempPath(254,SPath); GetTempFileName(SPath,'~SM',0,SFile); result:=SFile; DeleteFile(result); end; //============================================================================= // Procedure: CreateAccessFile // Author : ysai // Date : 2003-01-27 // Arguments: FileName:String;PassWord:string='' // Result : boolean //============================================================================= function CreateAccessFile(FileName:String;PassWord:string=''):boolean; //建立Access文件，如果文件存在則失敗 var STempFileName:string; vCatalog:OleVariant; begin STempFileName:=GetTempPathFileName; try vCatalog:=CreateOleObject('ADOX.Catalog'); vCatalog.Create(format(SConnectionString,[STempFileName,PassWord])); result:=CopyFile(PChar(STempFileName),PChar(FileName),True); DeleteFile(STempFileName); except result:=false; end; end; //============================================================================= // Procedure: CompactDatabase // Author : ysai // Date : 2003-01-27 // Arguments: AFileName,APassWord:string // Result : boolean //============================================================================= function CompactDatabase(AFileName,APassWord:string):boolean; //壓縮與修復(fù)數(shù)據(jù)庫,覆蓋源文件 var STempFileName:string; vJE:OleVariant; begin STempFileName:=GetTempPathFileName; try vJE:=CreateOleObject('JRO.JetEngine'); vJE.CompactDatabase(format(SConnectionString,[AFileName,APassWord]), format(SConnectionString,[STempFileName,APassWord])); result:=CopyFile(PChar(STempFileName),PChar(AFileName),false); DeleteFile(STempFileName); except result:=false; end;

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