Is it possible to have Html.ActionLink add URL params automatically?

Question

What I'd like is for all urls to contain a certain parameter without having to pass it to the views and add it to ActionLink through the routevalues param. I have a section in my site that I want to keep track of a "return param" for all links. It works fine for forms since Html.BeginForm sets the action to the exact current url already.

So, if the page I'm at is

/MyController/MyAction/300?ReturnTo=100

and I output

Html.ActionLink("Next Screen", "MyOtherAction")

I'd like to see

<a href="/MyController/MyOtherAction/300?ReturnTo=100">Next Screen</a>

without having to do

Html.ActionLink("Next Screen", "MyOtherAction", new {ReturnTo = Model.ReturnTo})

Answer 1

You could write your own HtmlHelper extension that does this by calling Html.ActionLink, and combining the query strings. Use the ViewContext to get at the current query string.

Answer 2

Try this:

Html.ActionLink("Next Screen", "MyOtherAction", new {Model.ReturnTo})

The link will now appear the way you want it to be.