用Delphi创建一个空的Access数据库

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unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Db, ADODB, comobj;

type
TForm1 = class(TForm)
ADO: TADOConnection;
ADOQuery1: TADOQuery;
Button2: TButton;
Button3: TButton;
Memo1: TMemo;
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button2Click(Sender: TObject);
var Source,str_sql:string;
CreateDB:Variant;
begin
//判断数据库是否已经存在
if FileSearch('DB.MDB',ExtractFileDir(Application.ExeName)+'/')<>'' then
begin
Application.MessageBox('数据库已经存在！','提示',64);
exit;
end;

// 创建数据库
Source:=' Provider=Microsoft.Jet.OLEDB.4.0; '
+' Data Source= '
+ExtractFileDir(Application.ExeName)
+'/DB.MDB';
try
CreateDB:=CreateOleObject('ADOX.Catalog');
CreateDB.Create(Source);
Application.MessageBox('数据库创建成功','提示',64);
except
Application.MessageBox('数据库创建失败','提示',64);
end;

//创建数据库中的表
ADO.ConnectionString:=Source;
ADO.Connected:=true;

ADOQuery1.Connection:=ADO;
ADOQuery1.Close;
ADOQuery1.SQL.Clear;
str_sql:=' create table T ( ID char(10) ) ';
ADOQuery1.SQL.Add(str_sql);
try
ADOQuery1.ExecSQL;
Application.MessageBox('数据表创建成功','提示',64);
except
Application.MessageBox('数据表创建失败','提示',64);
end;

end;

procedure TForm1.Button3Click(Sender: TObject);
var DBName,s_sql:string;
begin
//删除数据表
ADOQuery1.Close;
ADOQuery1.SQL.Clear;
s_sql:=' drop table T ';
ADOQuery1.SQL.Add(s_sql);
try
ADOQuery1.ExecSQL;
Application.MessageBox('数据表删除成功','提示',64);
except
Application.MessageBox('数据表删除失败','提示',64);
end;

// 删除数据库
DBName:=ExtractFileDir(Application.ExeName)+'/DB.MDB';
try
DeleteFile(DBName);
Application.MessageBox('数据库删除成功！','提示',64);
except
Application.MessageBox('数据库删除失败！','提示',64);
end;
end;

end.