• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 239
  • Last Modified:

Database COnnection with Delphi

Dear Expert
I'm a beginner of Delphi programming and want to know the Database Connection of Delphi with any kind of database like Access,Oracle,mysql etc.Pls help me providing code to connect Delphi with 1) Access 2)Oracle and 3) Mysql.

Thanks in advance
0
binita11
Asked:
binita11
3 Solutions
 
TheRealLokiSenior DeveloperCommented:
This depends on your version of delphi.
but take a look in your program files\delphix\demos\ directory
there are some database demos there
0
 
sun4sundayCommented:
Here you can begin with  Fundamentals of Database Development

http://delphi.about.com/od/beginners/l/aa020601a.htm

sun4sunday
0
 
TuebloCommented:
The easiest waywould be to create a datasource in windows for your database. (Control panel, Administrative tools)

uses SysUtils, ActiveX, adoDB, DB, ...;

type

  TForm1 = class(TForm)
  :
  private
    FConnection : TADOConnection;
  :
  end;

functionTForm1.DatabaseConnect: Boolean;
begin
  result := TRUE;
  OleInitialize(nil);
  FConnection := TADOConnection.Create(NIL);
  FConnection.LoginPrompt := TRUE;
  FConnection.ConnectionString := PromptDataSource(0, '');
  try
    FConnection.Open;
  except
    result := FALSE;
  end;
end;

procedure TForm1.DatabaseDisconenct;
begin
  FConnection.Close;
  FreeAndNil(FConnection);
  OleUninitialize;
end;

If you do not want to have the promt dialog every time, you can also give the connection string explicitly. Example for a mySQL Database (the mentioned driver must be installed, check in the datasource dialog):

function TForm1.DatabaseConnect(databaseServer, databaseName, username, password: String): Boolean;
var connectionString : String;
begin
  result := TRUE;
  OleInitialize(nil);
  FConnection := TADOConnection.Create(NIL);
  FConnection.LoginPrompt := FALSE;
  connectionString := 'DRIVER={MySQL ODBC 3.51 Driver}; ' +
                       'SERVER=' + databaseServer + '; '   +
                       'DATABASE=' + databaseName + '; '   +
                       'UID=' + username + '; '            +
                       'PWD=' + password + '; '            +
                       'OPTION=3';
  FConnection.ConnectionString := connectionString;
  try
    FConnection.Open;
  except
    result := FALSE;
  end;
end;
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now