IIS URL Rewriting - Friendly URL: Querystring variable is repeated - iis-7

Question

In my IIS 7 configuration, I have created friendly URLs to convert:
http://mysite/restaurant.aspx?Name=SomeName
to
http://mysite/SomeName
To do this, I have the following rules:
<rule name="RedirectUserFriendlyURL1" enabled="true" stopProcessing="true">
<match url="^Restaurant\.aspx$" />
<conditions>
<add input="{REQUEST_METHOD}" pattern="^POST$" negate="true" />
<add input="{QUERY_STRING}" pattern="^Name=([^=&]+)$" />
</conditions>
<action type="Redirect" url="{C:1}" appendQueryString="false" />
</rule>
<rule name="RewriteUserFriendlyURL1" enabled="true" stopProcessing="false">
<match url="^([^/]+)/?$" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
<add input="{REQUEST_FILENAME}" pattern=".aspx" negate="true" />
</conditions>
<action type="Rewrite" url="Restaurant.aspx?Name={R:1}" appendQueryString="false" />
</rule>
Does the above seem correct to achieve what I'm trying?
For some reason, on every postback I get:
http://somesite/SomeName?Name=SomeName
Note that I have set appendQueryString to false.

Answer 1

The form postback action uses the underlying url, not the raw url.
A simple solution (I believe the server side form action property is only available in 3.5+):
protected void Page_Load(object sender, EventArgs e)
{
if ( !String.IsNullOrEmpty(Request.ServerVariables["HTTP_X_ORIGINAL_URL"]) )
{
form1.Action = Request.ServerVariables["HTTP_X_ORIGINAL_URL"];
}
}
http://blogs.iis.net/ruslany/archive/2008/10/23/asp-net-postbacks-and-url-rewriting.aspx