Data base connectivity and flex grid in vb
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The document discusses database connectivity in Visual Basic 6 using ADO (Active Data Objects). It describes the Connection object that represents a connection to a data source, the Command object that specifies database operations, and the Recordset object that represents a set of records. It explains how to define these objects, connect to a database, execute commands to retrieve data, and manipulate the retrieved data in a Recordset.
Data base connectivity and flex grid in vb
- 1. Database Connectivity using ADODB
- 2. Visual Basic 6 ADO Visual Basic 6 obsoletes the previously used database access technology provided by Jet This provides a new one known as ADO or Active Data Objects This technology allows users to access data easily from many existing databases like Oracle or MS SQL Server ADO is quite simple and allows programmers to provide flexible database front ends
- 3. Connection Object This object represents an open connection to the data source This connection can be a local connection or can be across a network Key Properties and Methods Property Methods ConnectionString Close Provider Open ConnectionTimeout CommandTimeout CursorLocation Mode
- 4. Command Object A command object specifies a specific method you intend to execute on or against the data source accessed by an open connection Key Properties and Methods Property Methods Key Properties and Execute Methods CommandText CommandType
- 5. Recordset Object The RecordSet object represents a complete set of records from an underlying base table in the database RecordSet object references only one record at a time as the current record Key Properties and Methods Methods Property CursorLocation AddNew CursorType Close and Open EOF and BOF MoveNext Fields MoveFirst RecordCount MoveLast MovePrevious
- 6. Putting These altogether Define and open a Connection to a data source Decide what data you need from the data source and define Command objects that will retrieve this data. Retrieve the data you require by executing the command objects and manipulate the data using RecordSet objects.
- 7. Database Connectivity Steps Make a VB application that can be used to connect to database
- 8. Go to components
- 9. Choose Microsoft ADO Data Control 6.0(OLEDB)
- 10. Component is added
- 11. Click on Adodc and go to its properties
- 12. Click on Build
- 13. Select Microsoft Jet 4.0 OLE DB Provider and next
- 14. Select database and test the connection
- 15. From here copy connection string and click ok
- 16. Establish Connection Dim con As New ADODB.Connection Dim rs As New ADODB.Recordset Dim cmd As New ADODB.Command Private Sub Form_Load() con.ConnectionString ="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsAdministratorDesktopEmployee.mdb" con.Open rs.Open "select * from employee", con, adOpenDynamic, adLockOptimistic cmd.ActiveConnection = con
- 17. Conti.. txt_id = rs.Fields(0) txt_name = rs.Fields(1) txt_desig = rs.Fields(2) txt_add = rs.Fields(3) txt_sal = rs.Fields(4) txt_doj = rs.Fields(5) txt_phn = rs.Fields(6) txt_email = rs.Fields(7)
- 18. How to use Flex Grid in VB Go to components
- 19. Choose Microsoft FlexGrid Control 6.0 from components
- 20. Select flexgrid from toolbox and drop it in form
- 21. Select Data tool from tool box and drop it in form
- 22. Select DataSource property of FlexGrid
- 23. Choose DatabaseName from Data tool properties
- 24. Choose your database which you want to use
- 25. Choose Recordset property of Data tool
- 26. Your selected recordset will be shown in flexgrid
- 27. How to use data grid in VB Go to components
- 28. Select Microsoft DataGrid Control 6.0(OLEDB)
- 29. Select data grid from tool box and drop in form
- 30. Go to Adodc properties
- 31. Select Microsoft Jet 4.0 ILE Db Provider
- 32. Select database name
- 33. Test the connection
- 34. Go to RecordSource select CommandType as 2- adCmdTable and Table
- 35. Select DataSource from data grid properties
- 36. Your data grid is working
- 37. References http://www.w3schools.com http://www.codeproject.com http://msdn.microsoft.com