We help IT Professionals succeed at work.

ODBC Connection

TAZI
TAZI asked
on
Hi All,

Is there a way of creating and ODBC connection through Delphi Code.  Microsoft Query requires you to select and ODBC Datasource before creating the query to extract the data from SQL Server.  I create the document, but I cannot open it from another machine as the ODBC connection does not exist.

How would I go about doing this.

Regard
TAZI
Comment
Watch Question

Listening...

Commented:
hi,
here is an example ive used for msaccess to create a odbc dsn for a db ,i would think SQLConfigDataSource() should still work if your db is  on a network server as long as the path is right though i havent tested that personally..:  

Regards Barry

hello stu :)

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure CheckDLL(dll : string);
    procedure CreateDSN(dsn,dbpath,desc : string);
    procedure RemoveDSN(dsn : string);
  end;

  var
  Form1: TForm1;
  DllHandle : THandle = 0;
  dllexists : boolean = false;
implementation

{$R *.DFM}

const
 ODBC_ADD_SYS_DSN = 4;
 ODBC_REMOVE_SYS_DSN = 6;

function SQLConfigDataSource(
 hwndParent: HWND;
 fRequest: WORD;
 lpszDriver: LPCSTR;
 lpszAttributes: LPCSTR): BOOL; stdcall; external 'ODBCCP32.DLL';

procedure TForm1.CheckDLL(dll : string);
var
i : integer;
begin
   DLLHandle := LoadLibrary('ODBCCP32.DLL');
   if DLLHandle <> 0 then
      dllexists := true
       else begin
      dllexists := false;
      showmessage(dll +' not found');
     end;
   if DLLHandle <> 0 then
    FreeLibrary(DLLHandle);
   end;

procedure TForm1.CreateDSN(dsn,dbpath,desc : string);
begin
Checkdll('ODBCCP32.DLL');
if not dllexists then exit
else begin
 SQLConfigDataSource(0, ODBC_ADD_SYS_DSN,
   'Microsoft Access Driver (*.mdb)', PChar(
   'DSN='+dsn+#0 +
   'Driver=ODBCJT32.DLL'#0 +
   'DBQ='+dbpath+#0 +
   'DefaultDir=D:\' + #0 +
   'Description='+desc+#0 +
   'FIL=MS Access'#0 +
   'UID=Admin'#0));
   ShowMessage(dsn+' Added');
  end;
end;

procedure TForm1.RemoveDSN(dsn : string);
begin
Checkdll('ODBCCP32.DLL');
if not dllexists then exit
else begin
 SQLConfigDataSource(0, ODBC_REMOVE_SYS_DSN,
   'Microsoft Access Driver (*.mdb)', PChar(
   'DSN='+dsn+#0));
   ShowMessage(dsn+' Removed or not found');
  end;
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
CreateDSN('ATestDsn','D:\mytestdb.mdb','test db');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
RemoveDSN('ATestDsn');
end;

end.
asi

Commented:
listen

Author

Commented:
Hi ..

I have managed to create an OBDC connection by writing to Windows Registry.  I make use of a 3rd Party component.

inthe .. I will test out the above code and keep you posted.

Thanks to all of you who have attempted to assist me.

Regards
TAZI

Commented:
hi,
is this question finished?

ADMINISTRATION WILL BE CONTACTING YOU SHORTLY.  Moderators Computer101 or Netminder will return to finalize these if still open in seven days.  Please post closing recommendations before that time.

Question(s) below appears to have been abandoned. Your options are:
 
1. Accept a Comment As Answer (use the button next to the Expert's name).
2. Close the question if the information was not useful to you, but may help others. You must tell the participants why you wish to do this, and allow for Expert response.  This choice will include a refund to you, and will move this question to our PAQ (Previously Asked Question) database.  If you found information outside this question thread, please add it.
3. Ask Community Support to help split points between participating experts, or just comment here with details and we'll respond with the process.
4. Delete the question (if it has no potential value for others).
   --> Post comments for expert of your intention to delete and why
   --> You cannot delete a question with comments, special handling by a Moderator is required.

For special handling needs, please post a zero point question in the link below and include the URL (question QID/link) that it regards with details.
http://www.experts-exchange.com/jsp/qList.jsp?ta=commspt
 
Please click the Help Desk link on the left for Member Guidelines, Member Agreement and the Question/Answer process for further information, if needed.  http://www.experts-exchange.com/jsp/cmtyHelpDesk.jsp

Click you Member Profile to view your question history and keep them all current with updates as the collaboration effort continues, to track all your open and locked questions at this site.  If you are an EE Pro user, use the Power Search option to find them.  Anytime you have questions which are LOCKED with a Proposed Answer but does not serve your needs, please reject it and add comments as to why.  In addition, when you do grade the question, if the grade is less than an A, please add a comment as to why.  This helps all involved, as well as future persons who may access this item in the future to seek help.

To view your open questions, please click the following link(s) and keep them all current with updates.
http://www.experts-exchange.com/questions/Q.20017856.html
http://www.experts-exchange.com/questions/Q.20103890.html
http://www.experts-exchange.com/questions/Q.20109103.html
http://www.experts-exchange.com/questions/Q.20143246.html
http://www.experts-exchange.com/questions/Q.20184790.html
http://www.experts-exchange.com/questions/Q.20185302.html
http://www.experts-exchange.com/questions/Q.20187487.html


To view your locked questions, please click the following link(s) and evaluate the proposed answer.
http://www.experts-exchange.com/questions/Q.20114793.html

PLEASE DO NOT AWARD THE POINTS TO ME.  
 
------------>  EXPERTS:  Please leave any comments regarding your closing recommendations if this item remains inactive another seven (7) days.  Also, if you are interested in the cleanup effort, please click this link http://www.experts-exchange.com/jsp/qManageQuestion.jsp?ta=commspt&qid=20274643

Moderators will finalize this question if still open in 7 days, by either moving this to the PAQ (Previously Asked Questions) at zero points, deleting it or awarding expert(s) when recommendations are made, or an independent determination can be made.  Expert input is always appreciated to determine the fair outcome.
 
Thank you everyone.
 
Moondancer
Moderator @ Experts Exchange
Commented:
ive used the code i posted and it works so im putting as answer.
TAZI logged in AFTER this request and chose not to respond.  Therefore I finalized this today.
Moondancer - EE Moderator

Explore More ContentExplore courses, solutions, and other research materials related to this topic.