如何使用母版页在活动菜单项上设置 css 类？

当我单击 ASP.NET 母版页中的子菜单项或主项时，如何设置活动菜单项颜色。

我的代码是（母版页源代码）

<ul class="art-menu">
      <li><a href="#" class="{ActiveItem}"><span class="l"></span><span class="r"></span><span
                            class="t">Submission</span> </a>
                            <ul>
                                <li><a href="../QuoteStatus.aspx">Search Submission</a></li>
                                <li><a href="../NewQuote.aspx">New Submission</a></li>
                            </ul>
                        </li>
                        <li><a href="#"><span class="l"></span><span class="r"></span><span class="t">Requests</span></a>
                            <ul>
                                <li><a href="../Requests/IssueCertificates.aspx">Issue Certificates</a></li>
                                <li><a href="../Requests/QuoteCancellation.aspx">Cancellation</a></li>
                                <li><a href="../Requests/LossRuns.aspx">Loss Runs</a></li>
                                <li><a href="../Requests/Endorsements.aspx">Endorsements</a></li>
                            </ul>
                        </li>
                        <li><a href="#"><span class="l"></span><span class="r"></span><span class="t">Reports</span></a>
                        </li>
                        <li><a href="#"><span class="l"></span><span class="r"></span><span class="t">Configuration</span></a>
                            <ul>
                                <li><a href="../Administration/UserInformation.aspx">User Information</a></li>
                                <li><a href="../SignUp.aspx">New User</a></li>
                                <li><a href="../Administration/AdminSettings.aspx">Admin Settings</a></li>
                            </ul>
                        </li>
</ul>

如何编写代码，请给我建议......

感谢你 赫曼斯

这就是我所做的。可能有更好的方法。你可以尝试一下。

注意：您的链接应该有runat="server"这样你就可以从代码隐藏中访问它们

protected void Page_Load(object sender, EventArgs e)
{            
    string curlink = Request.RawUrl;

    if (curlink.Contains("/administration/school")) 
    {
        schoolinfolink.Attributes["class"] = "selected";
    }
    else if (curlink.Contains("/administration/result"))
    {
        resultlink.Attributes["class"] = "selected";
    }
    else if (curlink.Contains("/administration/staff"))
    {
       staffslink.Attributes["class"] = "selected";
    }

}