FireDAC 下的 Sqlite [6]

主要就是設置 TFDConnection 的兩個鏈接參數: Password, NewPassword, 非常簡單.

const
  dbPath = 'C:\Temp\SQLiteTest.sdb';

{建立加密數據庫, 密碼是 mm123}
procedure TForm1.FormCreate(Sender: TObject);
const
  strTable = 'CREATE TABLE MyTable(Id integer, Name string(10), Age byte)'; //Id, Name, Age 三個字段
begin
  if FileExists(dbPath) then DeleteFile(dbPath);

  FDConnection1.Params.Add('DriverID=SQLite');
  FDConnection1.Params.Add('Database=' + dbPath);
  FDConnection1.Params.Add('Password=mm123'); //相同與 Password=aes-256:mm123; aes-256 是默認的加密算法;
                                              //還有: aes-128,aes-192,aes-256, aes-ctr-128,aes-ctr-192,aes-ctr-256, aes-ecb-128,aes-ecb-192,aes-ecb-256
  //建表並輸入測試數據
  FDConnection1.ExecSQL(strTable);
  FDConnection1.ExecSQL('INSERT INTO MyTable(Id, Name, Age) VALUES(:1, :2, :3)', [1, 'abc', 23]);
end;

{打開有密碼的數據庫}
procedure TForm1.Button1Click(Sender: TObject);
begin
  FDConnection1.Params.Clear;
  FDConnection1.Connected := False;

  FDConnection1.Params.Add('DriverID=SQLite');
  FDConnection1.Params.Add('Database=' + dbPath);
  FDConnection1.Params.Add('Password=mm123');
  FDConnection1.Connected := True;
  FDQuery1.Open('SELECT * FROM MyTable');
end;

{修改密碼}
procedure TForm1.Button2Click(Sender: TObject);
begin
  FDConnection1.Params.Clear;
  FDConnection1.Connected := False;

  FDConnection1.Params.Add('DriverID=SQLite');
  FDConnection1.Params.Add('Database=' + dbPath);
  FDConnection1.Params.Add('Password=mm123');
  FDConnection1.Params.Add('NewPassword=mm12345'); //新密碼, 密碼為空表示取消密碼
  FDConnection1.Connected := True;
  FDConnection1.Connected := False;
end;

FDSQLiteSecurity1.DriverLink := FDPhysSQLiteDriverLink1;  //TFDSQLiteSecurity 和 FireDAC.Phys.SQLite 裡的其他四個控件, 使用前都要先指定這個屬性
FDSQLiteSecurity1.Database := dbPath;    //指定數據庫路徑
FDSQLiteSecurity1.Password := 'mm111';   //密碼
FDSQLiteSecurity1.ToPassword := 'mm222'; //新密碼
FDSQLiteSecurity1.SetPassword;           //設置密碼
FDSQLiteSecurity1.ChangePassword;        //修改密碼
FDSQLiteSecurity1.RemovePassword;        //移除密碼