MVC中在控制器中怎样获取View中的控件

Question

在View中有两个DIV,一个是用户登录的div，另外一个是欢迎用户的Div,代码如下：
 <form id="f1" action="/Cart/Login" method="post">
                <div id="login">
                <div class="login_main">
                    <span id="ctl00_dl">
                        <div class="login_main_about">
                            <table cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
                                <tbody>
                                    <tr>
                                        <td align="right">
                                            用户名：
                                        </td>
                                        <td>
                                            <input class="login_input_kuang" id="txtName" name="txtName" tabindex="1" size="10">
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="right">
                                            密 &nbsp;码：
                                        </td>
                                        <td>
                                            <input class="login_input_kuang" id="txtpwd" name="txtpwd" tabindex="1" type="password"
                                                size="10">
                                        </td>
                                    </tr>
                                </tbody>
                            </table>
                        </div>
                        <div class="login_main_login">
                        <input type="submit" value="登录" onclick="return valid();" />
                          
                        </div>
                    </span>
                </div>
                </div>
                <div id="Welcome" style="display: none">
                    <div class="login">
                        <div class="login_top">
                        </div>
                        <div class="login_main">
                            <span id="Span1">
                                <div class="login_main_about">
                                    <table cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
                                        <tbody>
                                            <tr>
                                                <td align="left">
                                                    <%if (Session["user"] != null)
                                                      { %>
                                                    欢迎您：<%=(Session["user"] as users).name%>
                                                    <%} %>
                                                </td>
                                            </tr>
                                        </tbody>
                                    </table>
                                </div>
                            </span>
                        </div>
                    </div>
                </div>
                </form>
当点登陆时，让"id=login"的div隐藏，id=welcome的div可见。怎么做到啊？

Answer 1

1。ajax。
2。判断session，if else判断向客户端输出哪段代码。