Imports System.Data.SqlClient

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim connetionString As String

        Dim sqlCnn As SqlConnection

        Dim sqlCmd As SqlCommand

        Dim adapter As New SqlDataAdapter

        Dim ds As New DataSet

        Dim i As Integer

        Dim sql As String



        connetionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserNamePassword=Password"

        sql = "Select  * from product"



        sqlCnn = New SqlConnection(connetionString)

        Try

            sqlCnn.Open()

            sqlCmd = New SqlCommand(sql, sqlCnn)

            adapter.SelectCommand = sqlCmd

            adapter.Fill(ds)

            For i = 0 To ds.Tables(0).Rows.Count - 1

                MsgBox(ds.Tables(0).Rows(i).Item(0) & "  --  " & ds.Tables(0).Rows(i).Item(1))

            Next

            adapter.Dispose()

            sqlCmd.Dispose()

            sqlCnn.Close()

        Catch ex As Exception

            MsgBox("Can not open connection ! ")

        End Try

    End Sub

End Class