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ado.net

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Submitted on: 1/1/2015 6:03:00 PM
By: m.shihipar (from psc cd)  
Level: Beginner
User Rating: By 4 Users
Compatibility: VB.NET
Views: 1084
 
     Gives a basic knowldge of ADO.NET
 
code:
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//**************************************
// Name: ado.net
// Description:Gives a basic knowldge of ADO.NET
// By: m.shihipar (from psc cd)
//**************************************

Option Strict Off
Option Explicit On 
Imports System
Imports System.Data.OleDb
 sub whatever()
 Dim myconnection As New OleDbConnection()
 Dim myReader As OleDbDataReader
 Dim cmSQL As OleDbCommand
 Dim strSQL As String
 
 myconnection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\ database.mdb;"
 ('or add the database in bin folder of the project and substitute with the following)
myconnection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=database.mdb;"
 Try
strSQL = "SELECT * FROM tablename"
cmSQL = New OleDbCommand(strSQL, myconnection)
myconnection.Open()
myReader = cmSQL.ExecuteReader()
Do While myReader.Read()
Console.WriteLine(vbTab & "{0}" & vbTab & "{1}", myReader.GetInt32(0), myReader.GetString(1))
Loop
 Catch Exp As OleDbException
MsgBox(Exp.Message, MsgBoxStyle.Critical, "Oledb Error")
 Catch Exp As Exception
MsgBox(Exp.Message, MsgBoxStyle.Critical, "General Error")
 End Try
 ' Close and Clean up objects
 myconnection.Close()
 cmSQL.Dispose()
 myconnection.Dispose()
 myReader.Close)
 end sub


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