asp.net gridview绑定ratiobutton 和ajax

  protected void RbIsManual_CheckedChanged(object sender, EventArgs e)
        {
            RadioButton rb = sender as RadioButton;
            if (rb != null)
            {
                GridViewRow row = rb.Parent.Parent as GridViewRow;
                Button confirm = (Button)row.FindControl("save");
                confirm.Enabled = true;
            }
        }

<asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
          <ContentTemplate>
              <asp:GridView ID="AerocraftsGridView" runat="server" AutoGenerateColumns="False" 
                  AllowPaging="True"  
                  BackColor="White" BorderColor="Silver" BorderStyle="Ridge" BorderWidth="1px" 
                  CellPadding="3" CellSpacing="1" GridLines="None"

                  onpageindexchanging="AerocraftsGridView_PageIndexChanging" 
                  onrowdatabound="AerocraftsGridView_RowDataBound" PageSize="20"
                  >
                  <AlternatingRowStyle BackColor="White" />
                  <Columns>
                      <asp:TemplateField HeaderText="型号名称" ItemStyle-Width="130px">
                         <ItemTemplate>
                         
                         </ItemTemplate>
                      </asp:TemplateField>
                      <asp:TemplateField HeaderText="型号">
                         <ItemTemplate>
                             <asp:RadioButton ID="rbzy" runat="server"  Text="在研" GroupName="在研标示" 
                                 AutoPostBack="True" oncheckedchanged="RbInResearch_CheckedChanged"  />
                             <asp:RadioButton ID="rbywc" runat="server" AutoPostBack="True" Text="已完成" 
                                 GroupName="在研标示" oncheckedchanged="RbIsComplete_CheckedChanged" />
                         </ItemTemplate>
                      </asp:TemplateField>

                      <asp:TemplateField HeaderText="形式">
                         <ItemTemplate>
                             <asp:RadioButton ID="rbsd" runat="server" AutoPostBack="True" GroupName="Type" 
                                 Text="手动" oncheckedchanged="RbIsManual_CheckedChanged" />
                             <asp:RadioButton ID="rbzd" runat="server" AutoPostBack="True" GroupName="Type" 
                                 Text="自动" oncheckedchanged="RbIsAutomatic_CheckedChanged" />
                            
                         </ItemTemplate>
                      </asp:TemplateField>
                      <asp:TemplateField HeaderText="操作">
                        <ItemTemplate>
                            <asp:Button ID="save" runat="server" CssClass="btn_2k3"  ForeColor="White" Height="23px" Width="77px"  Text="确  定" onclick="Save_Click"  Enabled="False" />
                        </ItemTemplate>
                      </asp:TemplateField>
                  </Columns>
                  <EditRowStyle BackColor="#2461BF" />
                  <EmptyDataTemplate>
                      对不起，数据为空！
                  </EmptyDataTemplate>
                  <AlternatingRowStyle BackColor="#E6F7FE" />
                  <HeaderStyle BackColor="#B5CAE7" Font-Bold="True" ForeColor="White" />
                  <RowStyle BackColor="#B5CAE7" ForeColor="#305A68" />
                  <FooterStyle BackColor="#B5CAE7" Font-Bold="True" ForeColor="White" />
                  <PagerStyle BackColor="#B5CAE7" ForeColor="White" HorizontalAlign="Center" />
                  <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
                  <SortedAscendingCellStyle BackColor="#F5F7FB" />
                  <SortedAscendingHeaderStyle BackColor="#6D95E1" />
                  <SortedDescendingCellStyle BackColor="#E9EBEF" />
                  <SortedDescendingHeaderStyle BackColor="#4870BE" />
              </asp:GridView>
              <br />
                  <asp:LinkButton ID="btnFirst" CommandArgument="first" OnClick="PagerButtonClick"
                            runat="server">首 页</asp:LinkButton>
                        <asp:LinkButton ID="btnPrev" CommandArgument="prev" OnClick="PagerButtonClick" runat="server">上一页</asp:LinkButton>
                        <asp:LinkButton ID="btnNext" CommandArgument="next" OnClick="PagerButtonClick" runat="server">下一页</asp:LinkButton>
                        <asp:LinkButton ID="btnLast" CommandArgument="last" OnClick="PagerButtonClick" runat="server">尾 页</asp:LinkButton>
                        <asp:Label ID="LblCurrentIndex" runat="server"></asp:Label>
                        <asp:Label ID="LblPageCount" runat="server"></asp:Label>
                        <asp:Label ID="LblRecordCount" runat="server"></asp:Label><br /><br />
              <asp:Label ID="explain" runat="server" Text="(不可操作的是已纳入基线的型号)"></asp:Label>
          </ContentTemplate>
        </asp:UpdatePanel>