lazarus and ms access db on windows 7 64-bit.pdf

8/10/2019 Lazarus and MS Access DB on Windows 7 64-bit.pdf

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Lazarus and MS Access DB on Windows 7 64-bit1 of 10 Tuesday, 29 July 2014

Christopher W. Wells

Lazarus and MS Access DB

Contents

1. Software requirements

2. Database Example Program


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1 Software requirements

You will need to make sure you have the following software before continuing with the example program:

1. Microsoft Windows 7 (32-bit / 64-bit)http://www.microsoft.com

2. Microsoft Access Database Engine 2010 Redistributable (32-bit) -http://www.microsoft.com/en-

za/download/details.aspx?id=13255

3. Your Microsoft Access Database file.

4.

Lazarus 1.2.0 or newer -http://www.lazarus.freepascal.org/

2 Database Example Program

Below are the steps involved in using the installed software to create your first database application using

both Lazarus and MS Access.

1. Create a folder on the C: drive called Lazarus_MSAccess

2. Create a database called MyAccess.accdb

3. Add information to the database called MyAccess.accdb

4.

Create the Lazarus / Delphi program

The above steps will all be highlighted in screen dumps for you below:

2.1

Create the folder Lazarus_MSAcess

2.1.1 Left click on the Start ( ) button on of Windows 7, navigate toAll Programs, navigate to and left click

once onAccessories, left click on Windows Explorer.
http://www.microsoft.com/http://www.microsoft.com/http://www.microsoft.com/http://www.microsoft.com/en-za/download/details.aspx?id=13255http://www.microsoft.com/en-za/download/details.aspx?id=13255http://www.microsoft.com/en-za/download/details.aspx?id=13255http://www.microsoft.com/en-za/download/details.aspx?id=13255http://www.lazarus.freepascal.org/http://www.lazarus.freepascal.org/http://www.lazarus.freepascal.org/http://www.lazarus.freepascal.org/http://www.microsoft.com/en-za/download/details.aspx?id=13255http://www.microsoft.com/en-za/download/details.aspx?id=13255http://www.microsoft.com/


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.1.2 Left click on the right arrow of Computer, and then left click on your C: drive

N.B. The name of our C: drive is called Local Disk (C:) as shown in the diagram.


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2.1.3 Left click on the New Folder option from the file menu, rename the New Folder to

Lazarus_MSAccessand press the Enter key on your keyboard.

2.1.4 This ends the creation of the Lazarus_MSAccess folder.

2.2

Create the database MyAccess.accdb


once on Microsoft Office, left click on Microsoft Access 2010.

2.2.2 A screen similar to the one shown below should now appear, left click on the New button, left click on

Blank databaseoption and then left click on the


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2.2.3 A screen similar to the one shown below should now appear:

2.2.4 Rename the columns and activate the relevant database restrictions.

N.B. Below is our final changes.


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Column1 = Student_ID of type NUMBER

Column2 = Fname of type TEXT

Column3 = Sname of type TEXT

Column4 = Subject of type TEXT

2.2.5 Left click on the Close button to have the below prompt appear, left click on Yesto accept the changes:

2.2.6 The below prompt will now appear, rename the table to Studentand then left click on OKto accept

the changes:

2.2.7 Your screen should now look similar to the one shown below, left click on the Student table and you

should see the results as shown above.


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2.2.8 Left click on File, navigate and left click on Save Database As, locate the Lazarus_MSAccess folder and

save the database file as MyAccess.

2.3 Add information to the database called MyAccess.accdb

2.3.1 Left click on the Student table, a similar screen shown below should now be displayed.

2.3.2 Simply fill in the required information for column as you require.

2.3.3 Repeat the above steps to add more rows of data.

2.3.4 Left click on the Save button, when complete, close the database. This now concludes the creation of

the SQLite database sqlite1.db

2.4

Create a Lazarus Project


once on Lazarus, left click on Lazarus.


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2.4.2 A screen similar to the one shown below should now appear, left click on the + button.


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For this project, we will be requiring the following:

TODBCConnectionThis is under the SQLdb tab

TDataSourceThis is under the Data Access tab

TSQLQuery - This is under the SQLdb tab

TSQLTransaction - This is under the SQLdb tab

TDBGrid - This is under the Data Controls tab

2.4.3 Your screen should now look similar to the one shown below after adding all the above controls.

2.4.4 Add a button and a label to your form, remember to rename all your components. I have only

renamed the Form, Button and Label in my example.

TSQLQuery TSQLTransaction TODBCConnection

SQLdb tab

Use these

arrows to

expand your tabs


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2.4.5 Add the following code to your button click event and test the program:

//Required specification for MS Access Connection

ODBCConnection1.Driver := 'Microsoft Access Driver (*.mdb, *.accdb);

ODBCConnection1.params.add(DBQ=+ExtractFilePath(Application.ExeName) + MyAccess.accdb);

ODBCConnection1.Connected := True;

ODBCConnection1.KeepConnection := True;

//Transaction Part for MS Access Connection

SQLTransaction1.Database:= ODBCConnection1;

//Create the Query for MS Access Connection

SQLQuery1.Database:=ODBCConnection1;

SQLQuery1.UsePrimaryKeyAsKey:=False;

SQLQuery1.SQL.Text:='SELECT * FROM Student';

//Assign the DataSource for MS Access Connection

Datasource1.DataSet:=SQLQuery1;

DBGrid1.DataSource:=DataSource1;

// End of connection string

//This lets you know via the label if you are connected or not

If ODBCConnection1.Connected then

begin

lblStatus.caption:='Connected';

end;

// End of label notification

//This starts the query which was created in the connection string

// This will also pass the information through to the GridSQLQuery1.open;

2.4.6 If the above steps have been followed, then you should see the results of the information in your

database displayed in Lazarus. Enjoy.

lazarus and ms access db on windows 7 64-bit.pdf

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