我创建了一个非常简单的RadioButtonList:
<asp:RadioButtonList ID="rblDisplayAs" runat="server" AutoPostBack="true" RepeatLayout="UnorderedList" CssClass="tab-nav">
<asp:ListItem Selected="True" Text="List View" Value="list"></asp:ListItem>
<asp:ListItem Text="Calendar View" Value="cal"></asp:ListItem>
</asp:RadioButtonList>
当页面加载时,它会呈现如下:
<ul id="pagecontent_rblDisplayAs" class="tab-nav">
<li class="selected">
<input id="pagecontent_rblDisplayAs_0" type="radio" checked="checked" value="list">
<label for="pagecontent_rblDisplayAs_0">List View</label>
</li>
<li>
<input id="pagecontent_rblDisplayAs_1" type="radio" value="cal">
<label for="pagecontent_rblDisplayAs_0">Calendar View</label>
</li>
</ul>
我为"选定"类添加了一些 css 规则。但是,当用户单击单选按钮时,"selected"类将被删除,并且不会应用于新选择的选项。
如何确保包含当前选定/选中单选按钮的列表项始终具有"选定"类?
编辑:
如果我将其添加到隐藏的代码中:
Protected Sub rblDisplayAs_SelectedIndexChanged(sender as Object, e AS EventArgs) Handles rblDisplayAs.SelectedIndexChanged
rblDisplayAs.SelectedItem.Attributes.Add("class", "selected")
End Sub
然后在我更改选择后,它呈现为:
<ul id="pagecontent_rblDisplayAs" class="tab-nav">
<li>
<input id="pagecontent_rblDisplayAs_0" type="radio" checked="checked" value="list">
<label for="pagecontent_rblDisplayAs_0">List View</label>
</li>
<li>
<span class="selected">
<input id="pagecontent_rblDisplayAs_1" type="radio" value="cal">
<label for="pagecontent_rblDisplayAs_0">Calendar View</label>
</span>
</li>
</ul>
编辑:
这是 css。网站上还有其他位置不是由也使用这些样式的控件生成的 asp.net。
ul.tab-nav {
overflow: hidden;
margin: 0px;
padding: 0px;
position: relative;
height: 35px;
}
ul.tab-nav li {
list-style: none;
margin: 0px;
padding: 0px;
display: inline;
position: relative;
top: 5px;
line-height: 1.6;
background: none;
}
ul.tab-nav li.selected {
top: 0px;
z-index: 10;
}
ul.tab-nav li input {
display:none;
}
ul.tab-nav li a, ul.tab-nav li label
font-size: 116.67%;
font-size: 1.1667rem;
color: #a6a6a6;
font-family: 'FrutigerRoman', Arial;
text-decoration: none;
border: 1px solid #ccc;
border-bottom: 0px;
padding: 2px 2px 0px 2px;
display: inline-block;
position: relative;
height: 26px;
border-radius: 2px 2px 0px 0px;
background: #e9e9e9;
}
ul.tab-nav li.selected a, ul.tab-nav li.selected label {
border-bottom: 1px solid #fff;
padding: 2px 2px 5px 2px;
bottom: 0px;
color: #00619d;
background: #fff;
}
感谢您为您的问题添加ul
的 css。
需要对代码中的最后一个 css 类进行细微更改才能使所选样式正常工作。这是完整的aspx,代码和css,它们在测试Web应用程序中对我有用。
.ASPX
<asp:RadioButtonList ID="rblDisplayAs" runat="server" AutoPostBack="true" RepeatLayout="UnorderedList" OnSelectedIndexChanged="rblDisplayAs_SelectedIndexChanged" CssClass="tab-nav">
<asp:ListItem Selected="True" Text="List View" Value="list"></asp:ListItem>
<asp:ListItem Text="Calendar View" Value="cal"></asp:ListItem>
</asp:RadioButtonList>
代码隐藏
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack) return;
foreach (var li in rblDisplayAs.Items.Cast<ListItem>().Where(li => li.Selected))
li.Attributes.Add("class", "selected");
}
protected void rblDisplayAs_SelectedIndexChanged(object sender, EventArgs e)
{
rblDisplayAs.SelectedItem.Attributes.Add("class", "selected");
}
.CSS
ul.tab-nav {
overflow: hidden;
margin: 0;
padding: 0;
position: relative;
height: 35px;
}
ul.tab-nav li {
list-style: none;
margin: 0;
padding: 0;
display: inline;
position: relative;
top: 5px;
line-height: 1.6;
background: none;
}
ul.tab-nav li.selected {
z-index: 10;
}
ul.tab-nav li input {
display:none;
}
ul.tab-nav li a, ul.tab-nav li label {
font-size: 116.67%;
font-size: 1.1667rem;
color: #a6a6a6;
font-family: 'FrutigerRoman', Arial;
text-decoration: none;
border: 1px solid #ccc;
border-bottom: 0;
padding: 2px 2px 0 2px;
display: inline-block;
position: relative;
height: 26px;
border-radius: 2px 2px 0 0;
background: #e9e9e9;
}
ul.tab-nav .selected label {
border-bottom: 1px solid #fff;
padding: 2px 2px 5px 2px;
bottom: 0;
top: -5px;
color: #00619d;
background: #fff;
}