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Database connectivity using RDO (Remote data Object)

RDO uses ODBC (Open Data Base Connectivity), an ODBC Data Source, which must be set up through

the Windows Control Panel. Follow the steps below to set up an ODBC Data Source (this process is also

called "setting up a DSN", where "DSN" stands for "Data Source Name").The following steps is used to

setup system DSN as:

1.) Go to Start -> Windows Control Panel; double-click on Administrative Tools, then Data

Sources (ODBC). The ODBC Data Source Administratorscreen is displayed. Click on the

System DSN tab.

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2.) Click the Add button. The Create New Data Source dialog box will appear. Select Microsoft

Access Driver (*.mdb) from the list and click the Finish button.

3.) The ODBC Microsoft Access Setup dialog box will appear. ForData Source Name, type

Biblio. If desired, you can type an entry forDescription, but this is not required.

4.) Click the Select button. The Select Database dialog box appears. On a default installation of

VB6 or Visual Studio 6, the BIBLIO.MDB sample database should reside in the folder

C:\Program Files\Microsoft Visual Studio\VB98. Navigate to that folder, select BIBLIO.MDB

from the file list, and click OK.

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5.) When you are returned to the ODBC Microsoft Access Setup screen, the database you selected

should be reflected as shown below. Click OK to close this screen.

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6.) When you are returned to the ODBC Data Source Administrator screen, the new DSN should

appear as shown below. Click OK to close this screen.

Connecting VB application to MS Access database using the

RDO Data Control (RDODC):

1.) Start a new VB project, and from the Components dialog box (invoked from the Project ->

Components menu), select Microsoft Remote Data Control 6.0 (SP3) as shown below and

click OK.

2.) Drag & Drop a remote data control (RDC) on your form, and set the properties as follows:

Property Value

Name MSRDC1

DataSourceName Select the DSN name as created above. Eg. Biblio

SQL select * from Customers

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3.) Now put three text boxes on the form, and set their Name, DataSource, and DataField properties

as follows:

Name DataSource DataField

Textbox1 MSRDC1 CustomerName

Textbox2 MSRDC1 CustomerID

Textbox3 MSRDC1 Phone

4.) Save and run the program. It works just like the other data control.

Code for Add, delete, edit, update, movefirst, movenext, first, last

operations on the click event of command button:

Private Sub Command1_Click()

MSRDC1.Resultset.AddNew

End Sub

======================

Private Sub Command2_Click()

MSRDC1.Resultset.Delete

End Sub

Private Sub Command3_Click()

MSRDC1.Resultset.MoveFirst

End Sub

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Private Sub Command4_Click()

MSRDC1.Resultset.Update

End Sub

Private Sub Command5_Click()

MSRDC1.Resultset.Edit

End Sub

Private Sub Command6_Click()

MSRDC1.Resultset.MovePrevious

End Sub

Private Sub Command7_Click()

MSRDC1.Resultset.MoveFirst

End Sub

Private Sub Command8_Click()

MSRDC1.Resultset.MoveLast

End Sub