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<%=控件ID.ClientID%>抓取不到控件客户端ID

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[已解决问题] 解决于 2012-07-16 17:01
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SignIn.aspx.cs" Inherits="DSN.SignIn" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Avopo DSN Platform::登录</title>

    <script type="text/javascript">
     window.onload = function(){
     
      var str=window.location.href;
    var es=/skin=/;
    es.exec(str);
    var right=RegExp.rightContext;
        if(right=='0')
        {
            alert("该帐号已在别处登陆,你被强迫下线");
            window.location.href=window.location.href.split("?")[0];
        }
     }
    </script>
    <script type="text/javascript">
    function reloadImage(url) 
     { 
        var img = document.getElementById("<%=ImageCode.ClientID%>"); 
        alert(img);
        img.src = url+"?" + Math.random(); 
     }
    </script>

</head>
<body>
    <form id="form1" runat="server">
    <div class="allcontent">
        <div class="header-wrap">
            <div class="header">
                <a class="logo" href="/"></a>
            </div>
        </div>
        <div class="content-wrap1">
            <div class="content-login">
                <div class="content-bg">
                    <asp:Login ID="Login" runat="server" CreateUserUrl="~/NewUser.aspx" FailureText="登陆失败,请重试."
                        SkinID="Login" DestinationPageUrl="~/Default.aspx">
                        <LoginButtonStyle CssClass="button" />
                        <TextBoxStyle CssClass="textBox" />
                        <LayoutTemplate>
                            <table align="center" border="0" width="100%" cellpadding="6">
                                <tr>
                                    <td>
                                        <asp:Panel ID="panFocus" runat="server" DefaultButton="LoginButton">
                                            <table border="0" cellpadding="2">
                                                <tr>
                                                    <td align="left">
                                                        <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">用户名:</asp:Label>
                                                    </td>
                                                    <td>
                                                        <asp:TextBox ID="UserName" runat="server" CssClass="textBox" Width="155px"></asp:TextBox>
                                                        <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName"
                                                            ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="Login">*</asp:RequiredFieldValidator>
                                                    </td>
                                                </tr>
                                                <tr>
                                                    <td align="left">
                                                        <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">密  码:</asp:Label>
                                                    </td>
                                                    <td>
                                                        <asp:TextBox ID="Password" runat="server" CssClass="textBox" TextMode="Password"
                                                            Width="155px"></asp:TextBox>
                                                        <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password"
                                                            ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="Login">*</asp:RequiredFieldValidator>
                                                    </td>
                                                </tr>
 <%--验证码--%>                                               
                                                <tr>
                                                    <td></td>
                                                    <td>
                                                    <asp:Image ID="ImageCode" runat="server" ImageUrl="~/IdentifyingCoding.aspx" />
       
<a href="javascript:reloadImage('IdentifyingCoding.aspx');">换一张</a>
<%--验证码--%> 
                                                    </td>
                                                </tr>
                                                
                                                
                                                <tr>
                                                    <td align="left" colspan="2" style="color: red">
                                                        <asp:Literal ID="FailureText" runat="server" EnableViewState="False"></asp:Literal>&nbsp;
                                                    </td>
                                                </tr>
                                                <tr>
                                                    <td align="left">
                                                        <asp:CheckBox ID="RememberMe" runat="server" Text="下次登录记住我" CssClass="noborder" />
                                                    </td>
                                                    <td align="right" c>
                                                        <asp:Button ID="LoginButton" runat="server" CommandName="Login" CssClass="button"
                                                            Text="登  录" ValidationGroup="Login" />
                                                    </td>
                                                </tr>
                                                <!--
                                <tr>
                                    <td align="left" class="linkNewUser" colspan="2">
                                        <asp:HyperLink ID="CreateUserLink" runat="server" NavigateUrl="~/NewUser.aspx">还没注册?</asp:HyperLink>
                                    </td>
                                </tr>-->
                                            </table>
                                        </asp:Panel>
                                    </td>
                                </tr>
                            </table>
                        </LayoutTemplate>
                    </asp:Login>
                </div>
            </div>
        </div>
        <div class="footer-wrap">
            <div class="footer">
                <a href="http://www.avopo.com" target="_blank" class="logo">
                    <img id="Img2" alt="logo" src="~/images/logo.png" runat="server" height="30" border="0" /></a>
                <a href="http://www.avopo.com/lsxy/ShowArticle.asp?ArticleID=176" class="footerLink"
                    target="_blank">联系我们</a> | <a class="footerLink" href="http://www.avopo.com/lsxy/ShowArticle.asp?ArticleID=177"
                        target="_blank">责任声明</a> | <a class="footerLink" href="http://www.avopo.com/lsxy/ShowArticle.asp?ArticleID=178"
                            target="_blank">网站所有者信息</a> | 京ICP备11029852号&nbsp;&nbsp;
                <br />
                Copyright ©2010~2011 Avopo Technologies. All Right Reserved.&nbsp;&nbsp;
            </div>
        </div>
    </div>
    <%--<table width="980" cellpadding="0" cellspacing="0" align="center" class="signinbody">
<tr>
<td>
       <table cellpadding="0" align="center" cellspacing="0" border="0" width="980" id="signinheader">
    <tr>
    <td width="5%">&nbsp;</td>
    <td width="45%" align=left valign="bottom">&nbsp;
    </td>
    <td width="50%">&nbsp;</td>
    </tr>
    </table>
    <table cellpadding="0" align="center" cellspacing="0" id="signincontent" border="0">
    <tr>
    <td width="50%">&nbsp;</td>
    <td width="50%">
    <table cellpadding="0" align="left" cellspacing="0" border="0" >
    <tr>
    <td class="signincontainer" valign=bottom>
    <asp:Login ID="Login" runat="server" CreateUserUrl="~/NewUser.aspx" FailureText="登陆失败,请重试."
        SkinID="Login" DestinationPageUrl="~/Default.aspx">
        <LoginButtonStyle CssClass="button" />
        <TextBoxStyle CssClass="textBox" />
        <LayoutTemplate>
            <table align="center" border="0" width="100%" cellpadding="6">
                <tr>
                    <td>
                        <asp:Panel ID="panFocus" runat="server" DefaultButton="LoginButton">
                            <table border="0" cellpadding="2">
                                <tr>
                                    <td align="left" >
                                        <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">用户名:</asp:Label></td>
                                    <td>
                                        <asp:TextBox ID="UserName" runat="server" CssClass="textBox" Width="155px"></asp:TextBox>
                                        <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName"
                                            ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="Login">*</asp:RequiredFieldValidator>
                                    </td>
                                </tr>
                                <tr>
                                    <td align="left" >
                                        <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">密  码:</asp:Label></td>
                                    <td>
                                        <asp:TextBox ID="Password" runat="server" CssClass="textBox" TextMode="Password"
                                            Width="155px"></asp:TextBox>
                                        <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password"
                                            ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="Login">*</asp:RequiredFieldValidator>
                                    </td>
                                </tr>
                                <tr>
                                    <td align="left" colspan="2" style="color: red">
                                        <asp:Literal ID="FailureText" runat="server" EnableViewState="False"></asp:Literal>&nbsp;
                                    </td>
                                </tr>
                                <tr>
                                <td align="left" >
                                        <asp:CheckBox ID="RememberMe" runat="server" Text="下次登录记住我" CssClass="noborder"/>
                                    </td>
                                    <td align="right" c>
                                        <asp:Button ID="LoginButton" runat="server" CommandName="Login" CssClass="button" Text="登  录" ValidationGroup="Login" />
                                    </td>
                                </tr>

                                <!--
                                <tr>
                                    <td align="left" class="linkNewUser" colspan="2">
                                        <asp:HyperLink ID="CreateUserLink" runat="server" NavigateUrl="~/NewUser.aspx">还没注册?</asp:HyperLink>
                                    </td>
                                </tr>-->
                            </table>
                        </asp:Panel>
                    </td>
                </tr>
            </table>
        </LayoutTemplate>
    </asp:Login>
    </td>
    </tr>
    </table>
    </td>
    </tr>
    </table>
    <table cellpadding="0" align="center" cellspacing="0" id="signinfill" border="0">
    <tr>
            <td width="*">
                &nbsp;
            </td>
            <td align="right" width="100" valign="center">
                <a href="http://www.avopo.com" target="_blank" class="logo">
                    <img id="Img1" alt="logo" src="~/images/logo.png" runat="server" height="30" border="0" /></a>
            </td>
            <td align="right" width="590" valign="center">
                <a href="http://www.avopo.com/lsxy/ShowArticle.asp?ArticleID=176" class="footerLink"
                    target="_blank">联系我们</a> | <a class="footerLink" href="http://www.avopo.com/lsxy/ShowArticle.asp?ArticleID=177"
                        target="_blank">责任声明</a> | <a class="footerLink" href="http://www.avopo.com/lsxy/ShowArticle.asp?ArticleID=178"
                            target="_blank">网站所有者信息</a> | 京ICP备11029852号&nbsp;&nbsp;    
                <br />Copyright ©2010~2011 Avopo Technologies. All Right Reserved.&nbsp;&nbsp;
            </td>
        </tr>
    </table>
</td>
</tr>
</table>--%>
    <%--    <script language="javascript" type="text/javascript">
    window.onload = function()
    {
        AdjustSize();
    }
    
    window.onresize = function()
    {
        AdjustSize();
    }
    
    function AdjustSize()
    {
        var height = document.documentElement.clientHeight;
        var content = document.getElementById("signincontent");
        var fill = document.getElementById("signinfill");
        fill.style.height = height -  content.offsetTop -content.offsetHeight  + "px";// - content.offsetTop - footer.style.marginTop - footer.style.marginBottom - content.style.marginTop - 20 + "px";
    }
    </script>--%>
    </form>
</body>
</html>

 

为什么所有登陆控件中的控件的id全都获取不到?下面是一个例子:

到底是为什么?不明白啊!

 

 


 
C#之父的主页 C#之父 | 初学一级 | 园豆:195
提问于:2012-07-16 16:24
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最佳答案
0

我已经解决问题了,原因是登陆页面是用Login控件写的,凡是放在里面的服务器控件都无法获取客户端id,只需将添加的控件换成客户端控件,同时直接通过document.getElementById("ImageCode")便可以获取用户控件了。

C#之父 | 初学一级 |园豆:195 | 2012-07-16 16:59
其他回答(3)
0

把head里 runat=server去掉

iImax | 园豆:3138 (老鸟四级) | 2012-07-16 16:27
0

不要加ClientID,直接获取ID试试

cx199055 | 园豆:4 (初学一级) | 2012-07-16 16:52
0

在后台手动添加

protected System.Web.UI.WebControls.Image ImageCode;

心未鳴 | 园豆:221 (菜鸟二级) | 2012-07-16 17:02
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