Dynamically alter markup when loading an ASP.NET page

Question

ASP.NET v2

I have MasterPage which includes the navigation bar for the site along the lines of:

<ul>
  <li id="current"><a href="overview.aspx">Home</a></li>
  <li><a href="users.aspx">Users</a></li>
  <li><a href="courses.aspx">Courses</a></li>
</ul>

The css styles the list and id="current" is required to highlight the current page. What is the best way to manipulate the markup so the relevant list item has is assigned id="current" within each page.

Saar · Accepted Answer · 2009-11-04 14:53:45Z

2

Try sitmap. Implemenation will be very easy.

look at: https://web.archive.org/web/20210510020922/http://aspnet.4guysfromrolla.com/articles/111605-1.aspx

answered Nov 4, 2009 at 14:53

Saar

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1 Comment

Gary Joynes Over a year ago

I didn't use this route but is a viable option for others

Middletone · Accepted Answer · 2009-11-04 16:16:30Z

1

Either use a sitemap or create the control in your code behind in the Page.prerender method.

Your html should look like this:

<ul>
    <li runat="server" id="navul_home">home</li>
    <li runat="server" id="navul_users">users</li>
    <li runat="server" id="navul_courses">courses</li>
</ul>

And the codebehind should be:

Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender
    Dim Currentpage As String = "users"
    navul_home.Attributes.Clear()
    navul_home.Attributes.Clear()
    navul_home.Attributes.Clear()
    Select Case Currentpage
        Case "home"
            navul_home.Attributes.Add("id", "current")
        Case "users"
            navul_users.Attributes.Add("id", "current")
        Case "courses"
            navul_courses.Attributes.Add("id", "current")
    End Select
End Sub

answered Nov 4, 2009 at 16:16

Middletone

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1 Comment

Gary Joynes Over a year ago

The li elements have an id of navul_home etc. How can these be referenced in the codebehind? In the sample code you have a variable called navul_home but there is no variable with this name, how do you get a reference to the id in the html

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