放在UPDATEPANEL中的验证码图片如何刷新

Question

本帖最后由 gang_liu1984 于 2011-05-21 12:42:10 编辑

Answer 1

前台页面  
  <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" 
        RenderMode="Inline">
    <ContentTemplate>
    <div id="table0">
    <table>
       <tr><td width="100px">用戶名:</td><td width="210px">
           <input id="name" type="text" runat="server" /></td>
        <td>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
                    ErrorMessage="用户名不能为空!" ControlToValidate="name" SetFocusOnError="True"></asp:RequiredFieldValidator></td></tr>
       <tr><td width="100px">密码:</td><td width="210px"><input id="pwd" type="password" runat="server" /></td>
        <td>
            <asp:HyperLink ID="HyperLink1" runat="server" Font-Underline="True" 
                NavigateUrl="~/findpwd.aspx" Target="_blank">?找回密码</asp:HyperLink>&nbsp&nbsp<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
                    ErrorMessage="你好像忘记输入密码!" ControlToValidate="pwd"></asp:RequiredFieldValidator></td></tr>
       <tr><td width="100px">验证码:</td><td width="210px"><input id="ecode" type="text" 
               runat="server" /></td>
                    <td>
                        <img id="checkcode" src="checkcode.aspx" alt="" onclick="this.src=this.src+'?'" align="middle" />
                        &nbsp
           <asp:Button runat="server" id="submit" text="登录" Width="50px" onclick="submit_Click" />&nbsp&nbsp
           <asp:button ID="zhc" runat="server" Text="注册" CausesValidation="False" PostBackUrl="zhuc.aspx" />
                    </td></tr>
     </table>
    </div>
    </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="submit" EventName="Click" />
        </Triggers>
    </asp:UpdatePanel>
    </form>