รบกวนช่วยดูcode ให้ผมหน่อยครับคือจะเพิ่มเเถวเข้าไปแต่มันไม่ยอมขึ้นเเถวใหม่ให้อ่ะครับมันวนอยู่เเถวเดิมครับ gridview

 Dim DT As DataTable = DV.Table
        Dim dr As DataRow = DT.NewRow
        Dim DV3 As New DataView(DT)
        Dim sql As String = "select * from customer"
        DA = New SqlDataAdapter(sql, cons)
        DA.Fill(DT)
        DV3.RowStateFilter = DataViewRowState.Added

        If DV3.Count = 0 Then
            dr("Cus_id") = 1
            dr("Cus_id") = DT.Rows(0)("Cus_id")
            Dim iCount As Integer = DT.Compute("max(Cus_id)", "")
            dr("Cus_id") = iCount + 1
            'dr("Cus_name") = 0
            'dr("Cus_lastname") = 0
            'dr("Cus_address") = 0
            'dr("Cus_tel") = 0
            'dr("Id_card") = 0
            'dr("username") = 0
            'dr("password") = 0
            'dr("question") = 0
            'dr("answer") = 0
            'dr("email") = 0

            DT.Rows.Add()
            'DV3.RowStateFilter = DataViewRowState.Added
        End If
        GridView1.PageIndex = 0
        GridView1.EditIndex = 0
        Me.MyGridBy()
        'checklastrow()