I have written a user control and have registered using CMS, which is a success but i have a slight problem..

I am using a datagrid not a cms one, which gets data from the another database. In the datagrid I have to provide a link with one parameter which points to another web page. In the master page i am using breadcrumbs so when the user clicks on the link it directs to that web page and shows the link in the breadcrumb.

the problem is how can i first take the user to that web page using the correct URL
using this in each row of the datagird
<a href="<%=%>?ID=somevallue">

Also making sure that link appears in the breadcrumb.

thanls