Hi All,

I want to dynamically populate a link with the URI of the current request, but set one specific query string parameter. All other querystring paramaters (if there are any) should be left untouched. And I don't know in advance what they might be.

Eg, imagine I want to build a link back to the current page, but with the querystring parameter "valueOfInterest" always set to be "wibble" (I'm doing this from the code-behind of an aspx page, .Net 3.5 in C# FWIW).

Eg, a request for either of these two:

/somepage.aspx
/somepage.aspx?valueOfInterest=sausages

would become:

/somepage.aspx?valueOfInterest=wibble

And most importantly (perhaps) a request for:

/somepage.aspx?boring=something
/somepage.aspx?boring=something&valueOfInterest=sausages

would preserve the boring params to become:

/somepage.aspx?boring=something&valueOfInterest=wibble

Caveats: I'd like to avoid string manipulation if there's something more elegant in asp.net that is more robust. However if there isn't something more elegant, so be it.

I've done (a little) homework: I found a blog post which suggested copying the request into a local HttpRequest object, but that still has a read-only collection for the querystring params. I've also had a look at using a URI object, but that doesn't seem to have a querystring