如何在代码隐藏页面中选择div元素? [英] How to select a div element in the code-behind page?

问题描述

我有一个div元素:

<div class="tab-pane active" id="portlet_tab1">

我想从代码隐藏页面中控制此元素，并删除活动"类

I want to control this element from the code-behind page and remove the class "active"

注意:

• Div不包含 runat ="server" 属性.

这不是母版页文件，而是另一个名为"AssignImages.aspx"的文件，其中包含ContentPlaceHolder.

This is not the master page file but this is another file named "AssignImages.aspx" and it contains ContentPlaceHolder.

div在此ContentPlaceHolder中:

The div is inside this ContentPlaceHolder:

<asp:Content ContentPlaceHolderID="ContentPlaceHolder1" runat="server" ID="Content1">  

推荐答案

如果要从后面的代码中找到控件，则必须在控件上使用 runat ="server" 属性.然后，您可以使用 Control.FindControl .

If you want to find the control from code behind you have to use runat="server" attribute on control. And then you can use Control.FindControl.

<div class="tab-pane active" id="portlet_tab1" runat="server">

Control myControl1 = FindControl("portlet_tab1");
if(myControl1!=null)
{
    //do stuff
}

如果您使用Runat服务器，并且控件位于 ContentPlaceHolder 内部，则必须知道ctrl名称不再是portlet_tab1.它将以ctrl00格式呈现.

If you use runat server and your control is inside the ContentPlaceHolder you have to know the ctrl name would not be portlet_tab1 anymore. It will render with the ctrl00 format.

类似于:#ctl00_ContentPlaceHolderMain_portlet_tab1.如果使用jquery，则必须修改名称.

Something like: #ctl00_ContentPlaceHolderMain_portlet_tab1. You will have to modify name if you use jquery.

您也可以在客户端使用jQuery，而无需使用runat-server属性:

You can also do it using jQuery on client side without using the runat-server attribute:

<script type='text/javascript'>

    $("#portlet_tab1").removeClass("Active");

</script>

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