"NullReferenceExeption was Unhandled"
i have a project here in my ojt. vb2010 form. i am getting this error:"NullReferenceExeption was Unhandled"..   why do i get it? im hoping for anybody's help. thank you.

this is my code;

Private Sub RefreshData()
    If Not con.State = ConnectionState.Open Then

        con.Open()
    End If

    Dim da As New OleDb.OleDbDataAdapter("SELECT ID as [ID], " & _
                                         "fname as [NAME], lname" & _
                                      "FROM asdf ORDER by ID", con)

    da.Fill(ds.Tables("asdf"))****  this part is where i get the error*****



    con.Close()


End Sub
"NullReferenceExeption was Unhandled"
===

i have a project here in my ojt. vb2010 form. i am getting this error:"NullReferenceExeption was Unhandled"..   why do i get it? im hoping for anybody's help. thank you.

this is my code;

Private Sub RefreshData()
    If Not con.State = ConnectionState.Open Then

        con.Open()
    End If

    Dim da As New OleDb.OleDbDataAdapter("SELECT ID as [ID], " & _
                                         "fname as [NAME], lname" & _
                                      "FROM asdf ORDER by ID", con)

    da.Fill(ds.Tables("asdf"))****  this part is where i get the error*****



    con.Close()


End Sub