我有以下的 asp.net 代码, 用户必须用 radiobutton 选择一行, 在没有选择 radio 按钮时, 我需要用 jquery 来禁用此按钮, 并在选择了 radio 按钮时再次启用它 。

<asp:GridView ID="GrvOpenForApproval" runat="server" 
        AutoGenerateColumns="False" Width="100%">
        <Columns>
              <asp:BoundField HeaderText="Dealer" DataField="Dealer.DealerNumber" />
            <asp:BoundField HeaderText="RequestNumber" DataField="RequestNumber" />
            <asp:BoundField HeaderText="Chassis"  DataField="Vehicle.Chassis"/>
            <asp:BoundField HeaderText="Commission" DataField="Vehicle.ComissionNumber" />
            <asp:BoundField HeaderText="Created" DataField="RequestDate" DataFormatString="{0:dd/MM/yyyy}" />
            <asp:BoundField HeaderText="Status"  DataField="CurrentStatus" />
            <asp:BoundField HeaderText="Comment" DataField="Comments" />
            <asp:TemplateField HeaderText="Select One">
            <ItemTemplate>
              <input name="RequestBaseId" type="radio" 
                        value= <%# Eval("RequesBaseId") %>  />
            </ItemTemplate>
          </asp:TemplateField>
        </Columns>
        <HeaderStyle CssClass="gridheader" />
    </asp:GridView>
    <br />
    <div class="clear hideSkiplink">
        <asp:Button runat="server" ID="BtnApproveSelected" 
            meta:resourcekey="BtnApproveSelectedResource" 
            onclick="BtnApproveSelectedClick"/>
    </div>

我试过了,但没用

Ready: function () {
            $( input[name="RequestBaseId"] ).click(function () {
                if (!$(this).val()) {
                    $("#BtnApproveSelected").attr("disabled", "disabled");
                }
                else {
                    $("#BtnApproveSelected").attr("disabled", "");
                }
            });
        }

生成的 html

<div>

    <table cellspacing="0" rules="all" border="1" id="MainContent_GrvOpenForApproval" style="width:100%;border-collapse:collapse;">

        <tr class="gridheader">

            <th scope="col">Dealer</th><th scope="col">RequestNumber</th><th scope="col">Chassis</th><th scope="col">Commission</th><th scope="col">Created</th><th scope="col">Status</th><th scope="col">Comment</th><th scope="col">Select One</th>

        </tr><tr>

            <td>&nbsp;</td><td>1</td><td>&nbsp;</td><td>&nbsp;</td><td>24/05/2012</td><td>Approval1</td><td>123</td><td>

              <input name="RequestBaseId" type="radio"  

                        value= 1  />

            </td>

        </tr><tr>

            <td>DEAL-1</td><td>1</td><td>CH1</td><td>123C</td><td>24/05/2012</td><td>Approval1</td><td>12</td><td>

              <input name="RequestBaseId" type="radio"  

                        value= 2  />

            </td>

        </tr><tr>

            <td>&nbsp;</td><td>1</td><td>&nbsp;</td><td>&nbsp;</td><td>24/05/2012</td><td>Approval1</td><td>123</td><td>

              <input name="RequestBaseId" type="radio"  

                        value= 3  />

            </td>

        </tr><tr>

            <td>DEAL-1</td><td>1</td><td>CH1</td><td>123C</td><td>24/05/2012</td><td>Approval1</td><td>12</td><td>

              <input name="RequestBaseId" type="radio"  

                        value= 4  />

            </td>

        </tr><tr>

            <td>DEAL-1</td><td>1</td><td>CH1</td><td>123C</td><td>24/05/2012</td><td>Approval1</td><td>12</td><td>

              <input name="RequestBaseId" type="radio"  

                        value= 5  />

            </td>

        </tr>

    </table>

</div>

    <br />

    <div class="clear hideSkiplink">

        <input type="submit" name="ctl00$MainContent$BtnApproveSelected" value="Approve selected request" id="MainContent_BtnApproveSelected" disabled="disabled" class="aspNetDisabled" ClientID="BtnApproveSelected" />

    </div>