Change AutoPostBack setting on a datagrid column from server-side VB.NET code.

I have a datagrid with columns that are bound to a datasource from SQL server table.  The HTML code is the following;

<asp:datagrid id="dgAddressCorrection" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 180px" AllowPaging="True" OnPageIndexChanged="dgAddressCorrection_Change" runat="server" CssClass="WebControl_DataGridDef" PageSize="100" Width="1468px" AutoGenerateColumns="False" AllowSorting="True">
<Columns>
      <asp:BoundColumn Visible="False" DataField="SourceID"></asp:BoundColumn>
      <asp:BoundColumn DataField="Name" SortExpression="Name" HeaderText="Name"></asp:BoundColumn>
      <asp:BoundColumn DataField="Address" SortExpression="Address" HeaderText="Address"></asp:BoundColumn>
      <asp:BoundColumn DataField="Phone" SortExpression="Phone" HeaderText="Main Phone"></asp:BoundColumn>
      <asp:TemplateColumn>
            <ItemTemplate>
                  <asp:Button id="btnEdit" Text="Edit" Runat="server" Width="50px" CommandName="EditAddressCorrection" CssClass="WebControl_ButtonDef"></asp:Button>
            </ItemTemplate>
      </asp:TemplateColumn>
      <asp:TemplateColumn HeaderText="Overridden" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center">
            <ItemTemplate>
                  <asp:CheckBox id="IsAddressOverriddenField" AutoPostBack="True" OnCheckedChanged="EnableSavebtn" Checked='<%# DataBinder.Eval(Container.DataItem,"IsAddressOverridden") %>' runat="server" CssClass="WebControl_CheckBox">
                  </asp:CheckBox>
            </ItemTemplate>
      </asp:TemplateColumn>
</Columns>
</asp:datagrid>

On the server-side, I turn the AutoPostBack to false on the CheckBox column (ID=IsAddressOverriddenField) with the following code;

    Sub EnableSavebtn(ByVal sender As Object, ByVal e As EventArgs)
        btnSaveOvr.Enabled = True
        Dim i As Integer
        For i = 0 To (dgAddressCorrection.Items.Count - 1)
            Dim myCheckBox2 As CheckBox = CType(dgAddressCorrection.Items(i).Cells(5).Controls(1), CheckBox)
            myCheckBox2.AutoPostBack = False
        Next
    End Sub

This works, but I have to turn the AutoPostBack to false for every row in the datagrid.  Is there a way to change the AutoPostBack for the whole column instead of doint it for every row?  I only need to have AutoPostBack set to true for the first time the user click in one of the CheckBox in the datagrid, after that first click, I do not need AutoPostBack set to true.