Please enumerate the procedure in which a visual basic program can access a database using data control and Active x data object (ADO)?
A:
This is a big old topic but below are a couple of simple examples to read through a recordset...
Dim con As New ADODB.Connection
con.connectionstring = "My Connection String" -- see ConnectionStrings.com for examples
Dim rs As New ADODB.Recordset
con.Open
rs.Open "SELECT name FROM MyTable", con, adOpenForwardOnly, adLockReadOnly
Do While Not rs.EOF
Debug.Print rs.fields("name")
rs.movenext
Loop
rs.Close
Set rs = Nothing
con.Close
Set con = Nothing
This will work on any database that you have a driver for but if your using a system that supports stored procedures your better off using those...
Dim con As New ADODB.Connection
con.ConnectionString = "My Connection String" -- see ConnectionStrings.com for examples
Dim cmd As New ADODB.Command
cmd.CommandText = "MySpName"
cmd.CommandType = adCmdStoredProc
Dim param1 As New ADODB.Parameter
With param1
.Name = "@MyParam"
.Type = adInteger
.Direction = adParamInput
.Value = 10
End With
cmd.Parameters.Append param1
Set param1 = Nothing
Dim rs As ADODB.Recordset
con.Open
cmd.ActiveConnection = con
Set rs = cmd.Execute
Do While Not rs.EOF
Debug.Print rs.Fields("name")
rs.movenext
Loop
rs.Close
Set rs = Nothing
con.Close
Set con = Nothing
Rich Andrews
2008-11-28 18:38:30