Here is a snippet:
The above above client template ignores the URL value and simply displays the tracking number has a regular text field.
columns.Bound(p => p.URL).Title("Url").Visible(false);
columns.Template(p => p.TRACKINGNUMBER).ClientTemplate(
"<
a
href
=
'#= URL #'
>#= TRACKINGNUMBER #</
a
>"
).Title("Tracking Number");