扩展事件字符串中的 ClientID

发布于 2024-08-18 08:52:59 字数 1054 浏览 5 评论 0原文

我遇到了 <%= obj.ClientID %> 问题扩展,在 .ascx 用户控件中。

我有一个 .js 文件,包含一个 javascript 函数:

function doSomething(objectId)
{
    ...
}

我有一个 .ascx 文件,其中包含一些 html 元素,并且在一个元素的 onclick= 中我想调用 doSomething(),传递该 .ascx 文件中元素的 ID,其中传递的 ID 是所单击的元素以外的元素的 ID,因此我不能使用“this.”。

也许举个例子会更清楚。

这有效:

<script type="text/javascript">
    function redirect()
    {
        doSomething('<%= top.ClientID %>');
    }
</script>
<div id="top" runat="server">
    <img src="..." alt="..." onclick="redirect();"/>
</div>

但这不起作用:

<div id="top" runat="server">
    <img src="..." alt="..." onclick="doSomething('<%= top.ClientID %>');"/>
</div>

当我查看源代码时,我发现 <%= %>替换尚未发生,而不是“doSomething('ctl00_myControl_top');”我得到“doSomething('<%= top.ClientID %>');”

由于某种原因,脚本扩展发生在前一种情况下,但不会发生在后者中。当然,这种解决方法是不可接受的,因为如果我在页面上包含该控件的多个副本,它将中断 - 只有一个实例的“redirect()”函数可以访问。

关于如何使这种替代起作用有什么想法吗?

I'm having a problem with <%= obj.ClientID %> expansion, in a .ascx user control.

I have a .js file, containing a javascript function:

function doSomething(objectId)
{
    ...
}

I have a .ascx file, with some html elements, and in one element's onclick= I want to call doSomething(), passing the ID of an element in that .ascx file, where the passed ID is of an element other than the one being clicked on, so I can't use "this.".

Maybe it'd be clearer with an example.

This works:

<script type="text/javascript">
    function redirect()
    {
        doSomething('<%= top.ClientID %>');
    }
</script>
<div id="top" runat="server">
    <img src="..." alt="..." onclick="redirect();"/>
</div>

But this does not:

<div id="top" runat="server">
    <img src="..." alt="..." onclick="doSomething('<%= top.ClientID %>');"/>
</div>

When I look at the source, I see that the <%= %> substitution has not happened, instead of "doSomething('ctl00_myControl_top');" I get "doSomething('<%= top.ClientID %>');"

For some reason, the script expansion happens in the former case, but not in the latter. The work-around, of course, is not acceptable because it will break if I include multiple copies of the control on a page - only one instance's "redirect()" function will be accessible.

Any ideas on how to make this substitution work?

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评论(2

烟雨扶苏 2024-08-25 08:52:59

在我的机器上可以运行吗?

<div id="top" runat="server">
    <a href="#" onclick="doSomething('<%= top.ClientID %>')">rarrarara</a>
</div>

成为

<div id="ctl00_ContentPlaceHolder1_top">
    <a href="#" onclick="doSomething('ctl00_ContentPlaceHolder1_top')">rarrarara</a>
</div>

Works on my machine?

<div id="top" runat="server">
    <a href="#" onclick="doSomething('<%= top.ClientID %>')">rarrarara</a>
</div>

Becomes

<div id="ctl00_ContentPlaceHolder1_top">
    <a href="#" onclick="doSomething('ctl00_ContentPlaceHolder1_top')">rarrarara</a>
</div>
帅气尐潴 2024-08-25 08:52:59

考虑替代路线

确保您在 JavaScript 中使用内联表达式<%= (controlName).ClientID %> 引用的控件具有其“ClientIDMode”说明符设置为静态值,然后只需使用该控件的 ID 字段中的文本来引用它。我最终在最近的一个项目中使用了它,它效果很好。请参阅下面的链接以获取更详细的说明:

代码项目 - ASP.NET v4.0 客户端 ID 功能

除了将“ClientIDMode”说明符设置为“静态”之外,我还发现了一个关于从全局资源文件放置文本的有用想法(在语言切换的情况下)到不必在服务器级别运行的标准 HTML 控件的字段中。我在一个标准 HTML 按钮上使用了它,该按钮应该调用一个 JavaScript 函数来显示/隐藏特定的 div 或 ASP 面板。在内联表达式标签中使用 GlobalResource 函数,如下所示:

<input id="btnToggleFilterOptions" type="button" value="<%=GetGlobalResourceObject("SiteResource", "btnToggleFilterOption")%>" onclick="javascript:ToggleCssClass('divFilterOption','visible'); return false;" class="button submit" />

<asp:Panel ID="divFilterOption" ClientIDMode="Static" runat="server">
    <asp:TextBox ID="txtFilterOption1" runat="server" />
</asp:Panel>

我知道这是一篇旧文章,但在 Google 上搜索 Asp .NET 和 ClientID 时它很受欢迎。我希望这可以帮助其他人!

Consider an alternate route:

Ensure that the control you are referencing in JavaScript using the inline expression <%= (controlName).ClientID %> has its 'ClientIDMode' specifier set to a static value and then simply use the text in the ID field of that control to refer to it. I ended up using this in a recent project it works great. Please see the link below for a more detailed explanation:

Code Project - ASP.NET v4.0 Client ID Feature

Along with setting the 'ClientIDMode' specifier to "Static", I found a useful idea regarding placing text from a global resource file (in the case of language switching) into a field of a standard HTML control that does not have to run at the server level. I used this on a standard HTML button that was supposed to call a JavaScript function that would show/hide a specific div or ASP Panel. Use the GlobalResource function in the inline expression tags like so:

<input id="btnToggleFilterOptions" type="button" value="<%=GetGlobalResourceObject("SiteResource", "btnToggleFilterOption")%>" onclick="javascript:ToggleCssClass('divFilterOption','visible'); return false;" class="button submit" />

<asp:Panel ID="divFilterOption" ClientIDMode="Static" runat="server">
    <asp:TextBox ID="txtFilterOption1" runat="server" />
</asp:Panel>

I know this is an old post, but it is a popular hit when searching on Google for Asp .NET and ClientID. I hope this helps somebody else out!

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