How to generate url for href in aspx page

Question

How does one generate a URL in a master page's ASPX page so that the reference works everywhere across the app?

Here is an example from a menu in a master page:

<a href="Admin/AddVendor.aspx">Add Vendor</a>

The problem is that if I leave the URL as it is on the master page, then when someone is already on a page that resides in the Admin folder, this URL no longer works. I need to path the URL from the root every time, but forget how to do this in WebForms.

Answer 1

Try using this, which maps to your website's root directory:

<a href="/Admin/AddVendor.aspx">Add Vendor</a>

EDIT : In that case, you could do this:

<a href="<%= Page.ResolveUrl("~/Admin/AddVendor.aspx") %>">Add Vendor</a>

It would be far easier to just use the asp.net Hyperlink control though

<asp:HyperLink ID="Link1" runat="server" NavigateUrl="~/Admin/AddVendor.aspx" Text="Add Vendor" />