datagrid view help in vb.net

hi everyone. i have a technical question to ask.

i have run into a problem while doing a search program. please help me.

i am trying to search a database and return the results in a datagrid view. my webform contains a text box txtsearch and a button btnSearch and a datagrid view grdoutput. the problem is i can not get anything to display. here is the code

Imports System.Data
Imports System.data.OleDb

Partial Class search
Inherits System.Web.UI.Page
Dim myDataTable As New DataTable

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim strSQL As String

strSQL = "select Pin from Credentials where Gpa > " & txtSearch.Text & ""

Dim conConnection As New OleDbConnection
conConnection.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Ole DB Services=-4; Data Source=" & System.AppDomain.CurrentDomain.BaseDirectory() & "\App_Data\sh.mdb"
conConnection.Open()

Dim myDataAdapter As New OleDbDataAdapter(strSQL, conConnection)

myDataAdapter.Fill(myDataTable)
grdoutput.DataSource = myDataTable

conConnection.Close()
myDataAdapter.Dispose()
End Sub

End Class



can someone please help?