Microsoft KB Archive/150418

= How To Create an Access Database Through Visual Basic 4.0 =

Article ID: 150418

Article Last Modified on 6/28/2004

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APPLIES TO


 * Microsoft Visual Basic 4.0 Professional Edition
 * Microsoft Visual Basic 4.0 Professional Edition
 * Microsoft Visual Basic 4.0 16-bit Enterprise Edition
 * Microsoft Visual Basic 4.0 32-Bit Enterprise Edition

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This article was previously published under Q150418



SUMMARY
This article describes how to create an Access database programmatically with a code example. The code is useful if you need a database with a specific number of fields and records for testing purposes.



MORE INFORMATION
An Access database called TEST.MDB is created when you click the command button. In this example, the database contains 55 records with each record containing 40 integer fields. By changing some of the code, you alter the number of records and fields and the contents of the records.

In the Form_Load event, the code checks to see if the database exists. If the database does not exist, a command button is shown on the form. Clicking the command button creates the database.

Code Example
 Start Visual Basic 4.0. If it is already running, from the File menu, click New Project. Add a command button, data control, and a DBGrid control on Form1. Set the DataSource property of the DBGrid control to the Data control.  Copy the following code sample to the Form1 code window: Option Explicit Dim rs1 As Recordset Dim rs2 As Recordset Dim db As Database Dim td As TableDef Dim fl As Field

Private Sub Command1_Click Dim iFields As Integer, iRecords As Integer

' Create the database. Set db = CreateDatabase("C:\test.mdb", dbLangGeneral) Set td = db.CreateTableDef("Table1")

'Now that the database is created, add fields to the database For iFields = 1 To 5 'The last number can be changed. Set fl = td.CreateField("Field " & CStr(iFields), dbInteger) td.Fields.Append fl        Next iFields

db.TableDefs.Append td

' Now that the database has fields, add records through a        ' recordset. Set rs1 = db.OpenRecordset("Table1", dbOpenTable) For iRecords = 1 To 10 ' For each row rs1.AddNew          ' add a new record.

For iFields = 1 To 5     ' For each field in the record rs1("Field " & CStr(iFields)) = iFields ' add a number. Next iFields

rs1.Update Next iRecords

' Close both the recordset and database. rs1.Close db.Close

' Populate the DBGrid control with the contents of the Recordset. Set db = OpenDatabase("C:\test.mdb") Set rs1 = db.OpenRecordset("Select * from Table1") Set Data1.Recordset = rs1

Command1.Visible = False End Sub

Private Sub Form_Load If Dir("C:\test.mdb") = "" Then Command1.Caption = "Create Database" Command1.Visible = True End If

End Sub  Press the F5 key, or click Start on the Run menu to run the program. Click the Command button, and populate the DBGrid control. Note that the file TEST.MDB is also created.

Additional query words: 4.00 vb4win vb4all

Keywords: kbcode KB150418

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