Getting values from dynamically created template columns in gridview

hi, in my gridview i have some bound columns,and some template columns.and three columns dynamically added to the same gridview on the button click event. code for dynamic created columns like this For Each col As DataColumn In dtttt.Columns For Each row As DataRow In dtt.Rows If col.ColumnName = row.Item("CODE") Then Dim customField1 As New TemplateField() customField1.ShowHeader = True customField1.HeaderTemplate = New Gridviewtemplate(DataControlRowType.Header, col.ColumnName, "", "label") customField1.ItemTemplate = New Gridviewtemplate(DataControlRowType.DataRow, "", col.ColumnName, "Textbox") DGV1.Columns.Add(customField1) End If Next Next DGV1.DataSource = dtttt DGV1.DataBind() but when the time of accessing the values of gridview except dynamically created template column values are not working For i As Integer = 0 To DGV1.Rows.Count - 1 For count As Integer = 9 To DGV1.Columns.Count - 1 Try dggrow = DGV1.Rows(i) Select Case Incomes(Index) Case 1 Earnings += CInt(dggrow.Cells(count).Text * Days) Case 2 Earnings += CInt(dggrow.Cells(count).Text) Case 3 Earnings -= CInt(dggrow.Cells(count).Text) End Select Catch ex As Exception dggrow.Cells(count).Text = 0 End Try Index += 1 Next Next dggrow.Cells(count).Text- here its not getting the value of dynamic created template column value. how to access this value.anyone help me with this.this is very urgent.