I have a database named baiju.mdb with a table named PersData

Field Named (PNO,NAME,school,dob

i want to display data in text box in asp.net web (code in vb) as per input (PNO)in a text box and when a user writes PNO in a text box and press submit button. PNO,NAME,SCHOOL,DOB should display in three text boxes in asp.net page

1. The code i used is as under

mports System.Data.OleDb
Partial Class TEST
    Inherits System.Web.UI.Page
    Dim Connection As OleDbConnection
    Private Sub listCard(ByVal PNO As String)
        Dim con As New OleDbConnection
        Dim cmd As New OleDbCommand("SELECT [PNO], [Name], [school FROM [PersData] where PNo=@PNO", con)
        cmd.CommandType = Data.CommandType.StoredProcedure
        cmd.Parameters.AddWithValue("@PNO", PNO)
        Dim rdr As OleDbDataReader
        Try
            con.Open()
            rdr = cmd.ExecuteReader()
            While (rdr.Read())

            End While

            pnotxt.Text = "PNO"
           nametxt.Text = "Name"
            schooltxt.Text = "school"
        Catch ex As Exception
            Response.Write(Err.Description)
        Finally
            con.Close()
        End Try
    End Sub
    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        If Page.IsPostBack = True Then
            Dim PNO As String
            If Len(txtsearch.Text) > 0 Then
                PNO = txtsearch.Text
                listCard(PNO)
            End If
        End If
    End Sub
End Class

2 THE CODE I TRIED SECOND IS As under

Imports System.Data.OleDb
Partial Class info
    Inherits System.Web.UI.Page
    Dim connection As OleDbConnection
    Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
        listCard()
    End Sub
    Public Function FixNull(ByVal dbvalue) As String
        If dbvalue Is DBNull.Value Then
            Return ""
        Else
            Return dbvalue.ToString
        End If
    End Function
    Private Sub listCard()
        Dim PNO As String = DropDownList1.SelectedValue
        Dim connectString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
                                            "Data Source=J:\access\App_Data/AWingAMS.mdb"
        Dim cn As OleDbConnection = New OleDbConnection(connectString)
        cn.Open()
        Dim selectString As String = "SELECT PNO, Name, school FROM PersData"
        Dim cmd As OleDbCommand = New OleDbCommand(selectString, cn)
        cmd.Parameters.AddWithValue("@PNO", PNO)
        Dim reader As OleDbDataReader = cmd.ExecuteReader()

        pnotxt.Text = "@PNO"
        ranktxt.Text = "@NAME"
        nametxt.Text = "@SCHOOL"

    End Sub
    
End Class