Gridview梆定

<asp:GridView ID="gvSupplier" runat="server" PageSize="20" AutoGenerateColumns="False" Width="100%" OnDataBound="gvSupplier_DataBound" OnRowDataBound="gvSupplier_RowDataBound" AllowPaging="True">
        <Columns>
            <asp:BoundField HeaderText="No." >
                <ItemStyle Width="30px" />
            </asp:BoundField>
            <asp:TemplateField HeaderText="Delete">
                <ItemTemplate>
                    <asp:CheckBox ID="chkDelete" runat="server"  Enabled='<%# CanDelete(Eval("IsResponsible"),Eval("HasRegistered")) %>'  Checked='<%# CanDelete(Eval("IsResponsible"),Eval("HasRegistered")) %>' Width="50px" />
                </ItemTemplate>
                <HeaderStyle Width="50px" />
            </asp:TemplateField>
            <asp:TemplateField Visible="False">
                <ItemTemplate>
                    <asp:Label ID="lblSupplierID" runat="server" Text='<%# Bind("SupplierID") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField Visible="False">
                <ItemTemplate>
                    <asp:Label ID="lblRowID" runat="server" Text='<%# Bind("RowID") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="RegisterCode" HeaderText="RegisterCode">
                <ItemStyle Width="100px" />
            </asp:BoundField>
            <asp:BoundField DataField="CNSupplierName" HeaderText="CNSupplierName" />
            <asp:BoundField DataField="ENSupplierName" HeaderText="ENSupplierName" />
            <asp:CheckBoxField DataField="IsGlobalSupplier" HeaderText="IsGlobalSupplier" />
            <asp:CheckBoxField DataField="IsActiveSupplier" HeaderText="IsActive">
                <ItemStyle Width="100px" />
            </asp:CheckBoxField>
            <asp:CheckBoxField DataField="IsResponsible" HeaderText="IsResponsible">
                <ItemStyle Width="100px" />
            </asp:CheckBoxField>
             <asp:TemplateField>
                <ItemTemplate>
                    <a href='<%# GetNavigateUrl(DataBinder.Eval(Container.DataItem, "SupplierID").ToString()) %>'>
                    Details</a>
                </ItemTemplate>
                 <ItemStyle Width="100px" />
            </asp:TemplateField>
        </Columns>
        <PagerSettings Visible="False" />
    </asp:GridView>


 public bool CanDelete(object isResponsible, object hasRegistered)
    {
        bool responsible;
        bool registered;
        bool.TryParse(isResponsible.ToString(), out responsible);
        bool.TryParse(hasRegistered.ToString(), out registered);
        return responsible & (!registered);
    }