Copyright 2003 : Ismail M.Romi, PPU. All Rights Reserved 1 Lab10 Interacting with Data (Database...

Copyright 2003 : Ismail M.Romi, PPU. All Rights Reserved

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Lab10Lab10

Interacting with Interacting with DataData

(Database Management)(Database Management)


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Database ConceptDatabase Concept• Database: An integrated collection of data.

• Table: One data file (Set of records).

• Dbase: Collection of tables.

• Record: Set of fields.

• Field: Set of characters.

• Index: A key field with unique values for every record.


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Flat-File (Table)

Row - Record

Fields - Columns

Database Concept …[CONT]Database Concept …[CONT]


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• Relational Database: Collection of tables in which no duplicate data is found.

• Database file Extension: FileName.MDB

• Ms-Database(MDB) Contents:– Tables– Reports– Forms– Queries

Database Concept …[CONT]Database Concept …[CONT]


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Creating New DatabaseVisual Data Manager: A program available

with in the VB environment used to create databases.

V.Data Manager Tasks:– Create a new database.– Enter A new data into data file.– Edit existing dbase.– Searching.


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Executing Visual Data ManagerExecuting Visual Data Manager1- From Add-Ins menu select Visual Data Manager.

2- Visual Data Window appears.

Visual Data Window


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Creating DatabaseCreating Database

1- File menu => New => Microsoft Access => version 7.0 MDB.

2- Save the new database in the dialog box that appears.

3- The DataBase window will appear:

Database format ( MsAccess,Dbase, FxPro …)


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4- Select Properties.

•Right Click the mouse.

•Choose New Table.


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Creating Database …Creating Database …. [. [CONT]CONT]

5- Add Table Name.

•Add the Fields & Indexes.

•Build the Table.


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Using the DatabaseUsing the DatabaseYou can add, update, delete data from the

database as follow:

• Open the Dbase in the Database window.

• Open the table ( Double click or Right click to the mouse).

• Add, Update, Delete data.

• Close to return to the database window.


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Data ControlData ControlThe data control enables you to access the

database.

• Add data control to the form.

• Specify the following properties:– Database name– Record source– Caption.


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Linking Dbase fields with form’s ControlsLinking Dbase fields with form’s Controls

• Choose Label or Textbox control

• Change the following properties:– Data source (the data control name)– Data field. ( table field name )


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Advanced Data Control UsageAdvanced Data Control UsageData Control Methods:

• MoveFirst, MoveLast, MoveNaxt, MovePrevious, AddNew, Delete.

Using Data Control Methods:

Syntax

DatacontrolName. Recordset.Method

Example:

Data1.RecordSet.AddNew


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Data Control Properties • Data1.Recordset.EOF return True when reach the end of the file

(table)• Data1.Recordset.BOF return True when reach the beginning of the

file (table)• Data1.Recordset.Fields(“fieldname”).value returns the value of the field


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ADO Data ControlADO Data ControlData Grid ControlData Grid Control

• ADO stands for: ActiveX Data Object

• ADO data control : Enables accessing the database by VB program.

• Data Grid Control: Display in a table format the data requested form the database.


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Adding ADO & Data Grid Controls to Adding ADO & Data Grid Controls to the ToolBoxthe ToolBox

• From the project menu select components (CTRL T)

• From the dialog box select: – Microsoft ADO Data control 6.0.– Microsoft DatGrid Control 6.0.

• Click Ok button.

Now you can see two new controls appears at the end of the tool box.


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Designing ADO ControlDesigning ADO Control• Add the ADO control to the form.• Change the following properties:• Connection String:

– Provider : Microsoft jet 3.51 OLE DB Provider.– Select Dbase name.– Test Connections.

• Record Source: – Command Type: 2-adcmdTable.– Table: TableName– Apply


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Designing Data Grid ControlDesigning Data Grid Control

• Add Data Grid control to the form.

• Change the following properties:

• Data Source: Specify the ADO Name.

• Right Click the mouse.

• Select Retrieve Fields.

• From properties window assign the access type to the database ( Add, Delete….).


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Data Grid Control PropertiesData Grid Control Properties

• AllowAddNew (True/False): Enables to add new records.

• AllowUpdate(True/False): Enables to update records.

• AllowDelete(True/False): Enables to delete a specified record.


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Data Grid Control PropertiesData Grid Control Properties

• Col: (Column number): Enables you to specify a column.

• Row( Row Number): enables you to specify a row.

• Text: The text in the specified cell from Row&Col.

• Example:Datagrid1.Row=0: Datagrid1.Col=0

Print Datagrid1.text


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Lab TrainingUsing the MDI, design the following interface


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Lab Training [CONT]


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Lab10Lab10

EndEnd

Copyright 2003 : Ismail M.Romi, PPU. All Rights Reserved 1 Lab10 Interacting with Data (Database...

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