How to get a list of all BDE alias (native and ODBC)just like Database Explorer do?

How can I get the alias list from the BDE using Delphi 3.0.
I need to create database connections at run-time and I need to be able to get the alias
and the params of each driver type just like Delphi do when you config
a TDatabase object from the object inspector (the function of the window that
appears when you double click over a TDatabase component)

Mak042298Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

chrbCommented:
Hi,

There is an article on how to get all the alias names on Delphi32.com (www.delphi32.com). Look under D32 Magazine.

With kind regards
 Christian Bøhn
0
WaldekCommented:
Here is a unit . In this unit exist method GetAliasNames

//  Filename: AliasEd.pas
//  Version : 01.02
//  Date    : 29/03/97
//  Author  : Glenn Davies
//
//  Description:
//    BDE alias management component.
//
//  History:
//    14/06/97 - V01.03
//      Revised for compatibility with Delphi 3.
//    29/03/97 - V01.02
//      Added GetDriverList and GetDriverParams methods for completeness.
//    30/05/96 - V01.01
//      Now uses methods and properties of Session rather than BDE functions.
//      As a result, most methods are now procedures which raise exceptions if
//      an error occurs rather than Boolean functions. Methods now accept
//      TStrings objects as parameters rather than only TStringList objects.
//    16/05/96 - V01.00
//      Initial version.

unit AliasEd;

interface

uses
  SysUtils, Classes, DBTables;

//------------------------------------------------------------------------------

type

  {TAliasEditor class declaration}

  TAliasEditor = class(TComponent)
  private
    fParams: TStringList;
    fConfigMode: TConfigMode;
    fOldConfigMode: TConfigMode;
  protected
    procedure InitBDE;
    procedure RestoreConfigMode;
    procedure SetConfigMode;
  public
    constructor Create(owner: TComponent); override;
    destructor Destroy; override;
    procedure Add(const alias, driver: String; the_params: TStrings);
    procedure Delete(const alias: String);
    function Exists(const alias: String): Boolean;
    procedure Modify(const alias: String; the_params: TStrings);
    procedure GetAliasList(the_params: TStrings);
    function GetDriver(const alias: String): String;
    procedure GetDriverParams(const driver_name: String; the_params: TStrings);
    procedure GetDriverList(the_params: TStrings);
    procedure GetParams(const alias: String; the_params: TStrings);
    function GetPath(const alias: String): String;
    function GetType(const alias: String): String;
    property Params: TStringList read fParams write fParams;
  published
    property ConfigMode: TConfigMode read fConfigMode write fConfigMode default [cfmPersistent];
  end;

//------------------------------------------------------------------------------

procedure Register;

//------------------------------------------------------------------------------

implementation

//------------------------------------------------------------------------------

{TAliasEditor class implementation}

//------------------------------------------------------------------------------

procedure TAliasEditor.InitBDE;
begin
  if not(Session.Active) then
    Session.Active := True;
end;

//------------------------------------------------------------------------------

procedure TAliasEditor.RestoreConfigMode;
begin
  Session.ConfigMode := fOldConfigMode;
end;

//------------------------------------------------------------------------------

procedure TAliasEditor.SetConfigMode;
begin
  fOldConfigMode := Session.ConfigMode;
  Session.ConfigMode := fConfigMode;
end;

//------------------------------------------------------------------------------

constructor TAliasEditor.Create(owner: TComponent);
begin
  inherited Create(owner);
  fParams := TStringList.Create;
  fConfigMode := [cfmPersistent];
end;

//------------------------------------------------------------------------------

destructor TAliasEditor.Destroy;
begin
  fParams.Free;
  inherited Destroy;
end;

//------------------------------------------------------------------------------

//  Add a new alias.

procedure TAliasEditor.Add(const alias, driver: String; the_params: TStrings);
begin
  InitBDE;
  SetConfigMode;
  try
    Session.AddAlias(alias, driver, the_params);
    Session.SaveConfigFile;
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Delete an existing alias.

procedure TAliasEditor.Delete(const alias: String);
begin
  InitBDE;
  SetConfigMode;
  try
    Session.DeleteAlias(alias);
    Session.SaveConfigFile;
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Check if an alias exists.

function TAliasEditor.Exists(const alias: String): Boolean;
begin
  result := False;
  InitBDE;
  SetConfigMode;
  try
    result := Session.IsAlias(alias);
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Modify an existing alias.

procedure TAliasEditor.Modify(const alias: String; the_params: TStrings);
begin
  InitBDE;
  SetConfigMode;
  try
    Session.ModifyAlias(alias, the_params);
    Session.SaveConfigFile;
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Get a list of available aliases.

procedure TAliasEditor.GetAliasList(the_params: TStrings);
begin
  InitBDE;
  SetConfigMode;
  try
    Session.GetAliasNames(the_params);
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Get the driver name for an alias.

function TAliasEditor.GetDriver(const alias: String): String;
begin
  InitBDE;
  SetConfigMode;
  try
    result := Session.GetAliasDriverName(alias);
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Get the default parameters for specified driver

procedure TAliasEditor.GetDriverParams(const driver_name: String; the_params: TStrings);
begin
  InitBDE;
  Session.GetDriverParams(driver_name,the_params);
end;

//------------------------------------------------------------------------------

//  Get a list of currently installed drivers

procedure TAliasEditor.GetDriverList(the_params: TStrings);
begin
  InitBDE;
  Session.GetDriverNames(the_params);
end;

//------------------------------------------------------------------------------

//  Get the parameters for an alias.

procedure TAliasEditor.GetParams(const alias: String; the_params: TStrings);
begin
  InitBDE;
  SetConfigMode;
  try
    Session.GetAliasParams(alias, the_params);
  finally
    RestoreConfigMode;
  end;
end;

//------------------------------------------------------------------------------

//  Get the path for an alias.

function TAliasEditor.GetPath(const alias: String): String;
var
  the_params: TStringList;
begin
  the_params := TStringList.Create;
  try
    GetParams(alias,the_params);
    result := the_params.Values['PATH'];
  finally
    the_params.Free;
  end;
end;

//------------------------------------------------------------------------------

//  Get the type of an alias.

function TAliasEditor.GetType(const alias: String): String;
var
  the_params: TStringList;
begin
  the_params := TStringList.Create;
  try
    GetParams(alias,the_params);
    result := the_params.Values['TYPE'];
  finally
    the_params.Free;
  end;
end;

//------------------------------------------------------------------------------

procedure Register;
begin
  RegisterComponents('Samples', [TAliasEditor]);
end;

//------------------------------------------------------------------------------

end.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.