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Sending login information from client side to App. server

Posted on 2000-04-04
Medium Priority
Last Modified: 2010-04-04
   I'm working on a 3-tiered client/server project using Delphi 4,
Sql Server 6.5,Dcom.
I'd like to have login prompt on client side ,so that I enabled login
prompt on TREMOTESERVER but i don't know how application server
can verify this information.

   Thanks a lot
Question by:Arabzade
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Expert Comment

ID: 2686609
Hi Arabzade,

First of all add a new method to your inteface of your RemoteDataModule in your application server. Set it's invoke kind to Function, set it's return type to WordBool and add two parameters: UserCode and Password. Click refresh of the type library and close it.

Then flesh out the procedure in the RemoteDataModule with something like opening the query with the UserCode/Password parameters and return True to the Result of the Function if the queries IsEmpty or EOF/BOF = False;

Then in you ClientApp Create a small screen at startup/create and force the user to enter his UserCode/Password, then call your new function from your RemoteAppServer like this: DCOMConnection.AppServer.MyFunction(UserCode,Password), if the funtion returns true then run the application, or else terminate(close) it.



Accepted Solution

ShadowFax earned 150 total points
ID: 2686697
Sorry Arabzade,
the above was meant to be a proposed answer.



Expert Comment

ID: 2702021

Author Comment

ID: 2703421
Hi ShadowFax

   Thanks for the help.
If it's possible for you,write a simple code for
2nd paragraph.

  Best Regards

Expert Comment

ID: 2746554
Hi Arabzade,

Sure, here goes:

procedure TMyRemoteDM.CheckLogon(StaffNo: Integer; const Password: WideString): WordBool;
  Result := False ;
  if MyQuery.Active then
    MyQuery.Close ;
  MyQuery.ParamByName('StaffNo').AsInteger := StaffNo ;
  MyQuery.ParamByName('Password').AsString := Password ;
  MyQuery.Open ;
  if not MyQuery.IsEmpty then
    Result := True ;

If you've got any further questions just let me know.

Glad to help.


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