IIS 7.5 with URL Rewrite Module Doubles QueryString Params on Postback

Question

I\'m using IIS 7.5 on Windows 7 RC. I use the IIS Url Rewrite module to rewrite URLs.

Everything seems to work fine, until I perform a postback by clicking a button. It

Answer 1

Add the appendQueryString="false" attribute to the action element of the rewrite rule as well.

Hope this helps.

Answer 2

This is a security feature of the IIS Rewrite Module.

I personally prefer ISAPI Rewrite as it is much better, simpler to write rules, and has more features.

Have also found under moderate to high load (over 100 connections to a website) that the IIS Rewrite Module courses the application pool to crash and spawn and new process.

Answer 3

I was able to solve the issue by adding

Form.Action = Request.RawUrl;

to the Page_Load event. I was able to leave appendQueryString="TRUE" and so far it is working properly.