Skip to main content

Create a multi user login on Delphi 7


In building an application we are often confronted with cases where the user application consists of several circles or levels of data access. eg, for academic information systems for example, the system is later used by the school principal, teachers, students,. and of course, each job title has different data access, for example, teachers input grades, while students see the value of her on some subjects.
to deal with this case, the diperukan a system that has a multi-user login. so that it can be distinguished, as the admin user, students, teachers or others. The following is one example of a simple solution multi-user login.
with the specifications of the database using MS Access 2003, the second user is a guest and admin, and made use delpi7.
source for the login:





unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, ADODB, StdCtrls;

type
TForm1 = class(TForm)
Edit1: TEdit;
ComboBox1: TComboBox;
Edit2: TEdit;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Button1: TButton;
Button2: TButton;
Memo1: TMemo;
ADOConnection1: TADOConnection;
ADOQuery1: TADOQuery;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
with adoquery1 do
begin
if combobox1.Text=’Admin’ then
begin
SQL.Clear;
sql.Add(‘select * from admin where username=”‘+edit1.Text+’”‘);
open;
if adoquery1.RecordCount <> 0 then
begin
if adoquery1.FieldByName(‘passwd’).AsString = edit2.Text then
begin
Application.MessageBox(‘Anda berhasil login sebagai administrator.’,'Selamat Datang’);
end
else
begin
Application.MessageBox(‘Maaf, Password yang anda masukkan salah.’,'Perhatian!’);
end;
end
else
begin
Application.MessageBox(‘Username anda tidak ditemukan.’,'Perhatian!’);
end;
end;
if combobox1.Text=’Guest’ then
begin
SQL.Clear;
sql.Add(‘select * from guest where username=”‘+edit1.Text+’”‘);
open;
if adoquery1.RecordCount <> 0 then
begin
if adoquery1.FieldByName(‘passwd’).AsString = edit2.Text then
begin
Application.MessageBox(‘Anda berhasil login sebagai guest.’,'Selamat Datang’);
end
else
begin
Application.MessageBox(‘Maaf, Password yang anda masukkan salah.’,'Perhatian!’);
end;
end
else
begin
Application.MessageBox(‘Username anda tidak ditemukan.’,'Perhatian!’);
end;
end;
end;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
application.Terminate;
end;
end.
————————————————-end———————————-
silakan download source lengkapnya di

Popular posts from this blog

Login Form Delphi by Connecting to Ms Access Database.

this the step by step  to making application :

Login Form Delphi by Connecting Ms Access Database.

In making/ building application in Delphi, login Form is an important to protect application so that cannot be open by irresponsible person. This login Form is connected with database so that able to keep a lot of username data and password. Before make the application, please create a database as the picture below:
Picture :Login  form Delphi database Microsoft Access
Save the database in the folder which use to save the application


Next step is create the application

Enter the component and the source code as follows.


No Component NameProperties Value1Label1CaptionUsername2Label2CaptionPassword3Edit1Text -4Edit2Text -5Button1CaptionLogin6Adoconnection1--7AdoQuery1ConnectionADOConnection1

Arrange the component as the picture below:


Figure. Login Form Delphi design form



 Create new form



Form properties can be check in the table below
No Component NameProperties Value1Form1CaptionSuccess…

Step by step Accessing SMS With Delphi: Sending SMS Using Borland Delphi 7 Exploit Comport Component (Siemens))

In this example, will present the way how making SMS delivery program with Delphi, basically, data in data communication series between Delphi and mobile phone happen in Format Protocol Data Unit (PDU). The destination number of sending Message and message that will be sent through Delphi program that is made have to be changed into PDU Form first, next is the data will be sent through serial port to mobile phone. To make the send SMS Application , please enter the following component to Form 1.

No Component NameProperties ValueButton1CaptionConnectButton2CaptionDisConnectButton3CaptionConvert to PDUButton4CaptionSend to HPButton5CaptionClearButton6CaptionStart Send SMSButton7CaptionSet PortEdit1Text-Edit2Text<Type The SMS here>Edit3Text-Label1Caption1) Destination Number :Label2Caption2Label3CaptionPDU lengthLabel4CaptionLabel lengthComLed1--Memo1--Memo2--Comport1--Arrange the Component  in such away so that the visualization program is as follows:


Then type the follow…

The Example Using Chart In Borland Delphi 7

The Example Using Chart In Borland Delphi 7




In this writing will discuss about how to use the chart in Delphi 7. In the example that is made by using Delphi 7, chart will appear 2 data in the form of incremental data number, the first data named data 1 and the second data named data 2. Data 1 is incremental data 1 that is begun from 0 until 10; while data 2 is same. Yet, in the beginning condition of data 1 start from 0 while data 2 start from 1.


To make application as the explanation above, please enter the components in the table below into design form.


NoComponentPropertiesValueNote1Form1CaptionThe Chart of Data on Delphi 72GroupBox1CaptionThe Chart of Data on Delphi 73Label1CaptionData 14Label2CaptionData 25Edit1Text06Edit2Text07Button1CaptionShow to Chart8Button2CaptionClose9Timer1EnabledFalse10Chart--Check the NoteNote:

Double click on chart component, set the property of chart as below:


Click on  Add.. Button

Then the following chart gallery will be shown:



Choose the…