Need help with URL ReWrite in IIS 8.5

I am new to URL ReWrite. I am trying to create a rule to change
/Parts.aspx?pn=3299W-1-103
to
/Items.aspx?pn=3299W-1-103
With after "pn=" needing to be captured and applied to the rewritten URL.

I started with creating a blank rule. In the Match URL, under pattern I have "^/Parts.aspx?id=([_0-9a-z-]+)" but when I go to Test Pattern, it says the input data does not match the pattern.

If in the pattern I change it to "^/Parts.aspx([_0-9a-z-]+)" and test with "/Parts.aspx3299W-1-103" it works, but I need the "?pn=" to be there.

Any ideas or help?
LVL 1
John TolmachoffNetwork AdministratorAsked:
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becraigCommented:
Here you go:

<add input="{QUERY_STRING}" pattern="(?:^|&)id=([0-9]+)(?:&|$)" /> - this condition checks if the query string contains a parameter id that has a numeric value. The actual value is captured in a condition back-reference. Note that this pattern will work even if there are other parameters on the query string.

More info on how to make this work for you:
http://www.iis.net/learn/extensions/url-rewrite-module/using-rewrite-maps-in-url-rewrite-module
0
John TolmachoffNetwork AdministratorAuthor Commented:
For the testing of the pattern, turns out I needed to use the escape character before the ?, so the pattern is actually

^/Parts.aspx\?pn=([_0-9a-z-]+)

So now testing the pattern works.

However, testing the actual website, I keep getting a 404 page not found and looking at the IIS log, it appears that the rewrite rule is not even being used.
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John TolmachoffNetwork AdministratorAuthor Commented:
OK, got this to work finally.

SIMPLIFY

On the rule for pattern to match, used

/parts.aspx

rewrite to

/items.aspx

and it works as expected.
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John TolmachoffNetwork AdministratorAuthor Commented:
Sometimes try not to overthink the problem and simplify it and go with the basics.
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