Classic ASP form doesn't post on page refresh

I have an ASP page that takes two arguments on the querystring. On the page is a form that posts back to itself.

If I do the form post once, and then try to refresh the page, it doesn't repost the form. It loads the page as though it were loading for the first time, missing the querystring values.

Is there a way to ALWAYS force a开发者_如何学JAVA repost when I refresh a page that is the result of a FORM post?

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It sounds like the problem you're having is loss of some essential parameters to your page when posting. In ASP there are two primary methods of passing parameters, in the url string via GET or from a form POST. The former passes you values in the QueryString dictionary while the latter gives them to you in the Form dictionary. Fortunately for you it is possible to accept a parameter that exists in EITHER dictionary by looking to Request object:

Request["a"] will find a regardless of being in Request.QueryString["a"] or Request.Form["a"].

This will help you in your current dilemma because you can simply write your querystring parameters to your Form on initial load of the page as <input type="hidden" fields. On subsequent posts your Request["a"] search for your parameters will find them regardless of being passed in the URL (on initial load) or via post on subsequent calls.

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The problem was that I was going into the Firefox address bar and pressing Enter. This caused the URL to reload (and of course it didn't have the querystring after it reposted). So -- lesson is to do a check of the incoming vars and form vars to see if the page has been manually refreshed I suppose...

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You could still maintain the submitted values in this situation.

What you would need to do is log the most recent request in either a Cookie, Session or data/file store, and on each request, check to see if the request was handled before you remove the data.

Since what you were after was the querystring it could just be something like this:

 Response.Cookies("tempdata")("querystring") = Request.ServerVariables("QUERY_STRING")
 Response.Cookies("tempdata")("querystring_handled") = false

then when you are done with that request you can clear the cookie value or set the querystring_handled = true.

There are probably situations where this could cause some conflicts, but just so you know, it is still going to be possible for you to remember the request once it is received by the server.

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Which action does the form use: GET or POST? Normally, a form would use the POST action, but in this case, if you refresh the page with the posted form, you will not get anything in query string, because query string only gets passed via the GET action. Assuming that this issue is not caused by page caching, it seems to me like it works as designed (if the form POSTs data). Just make sure that you process the form variables if the query string is missing.