delphi读取数据库链接ini文件

unit UnDM;

interface

uses
  SysUtils, Classes, DB, ADODB;

type
  TDM_Tax = class(TDataModule)
    ADOCon_Tax: TADOConnection;
    ADOQry_Tax: TADOQuery;
    procedure DataModuleCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  DM_Tax: TDM_Tax;

implementation
uses IniFiles, Un_TaxMain;

{$R *.dfm}

procedure TDM_Tax.DataModuleCreate(Sender: TObject);
var
  ConnStr,provider,password,userid,datasource,initcatalog:String;
  inifilename:String;
  inifile:TInifile;
begin
  inifilename := ExtractFilePath(paramstr(0))+'db.ini';
  inifile := TInifile.Create(inifilename);
  provider := inifile.ReadString('Database','Provider','SQLOLEDB.1');
  userid := inifile.ReadString('Database','User ID','sa');
  password := inifile.ReadString('Database','Password','sa');
  datasource := inifile.ReadString('Database','Data Source','127.0.0.1');
  initcatalog := inifile.ReadString('Database','Initial Catalog','tax');
  ConnStr := 'Provider='+provider+';Password='+password+';Persist Security Info=True;User ID='+userid+';Data Source='+datasource+';Initial Catalog='+initcatalog;
  inifile.Destroy;
  ADOCon_Tax.ConnectionString := ConnStr;
  try
    ADOCon_Tax.Connected;
  except
    exit;
  end;
end;

end.