What is the alternative to rewritebase on IIS? - .htaccess

Question

I have the following .htaccess file in my website - I'm having to relocate it to a windows IIS machine and having problems with using the URL-Rewrite module to import a rule and create a web.config file.
This is my .htaccess file
# Rewrite URLs and direct to index.php
<IfModule mod_rewrite.c>
Options -Multiviews
RewriteEngine On
##
## If moving host, change the structure below to folder name of where public folder lives
##
RewriteBase /foldername/public
##
##
##
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.+)$ index.php?url=$1 [QSA,L]
</IfModule>
It fails on the RewriteBase but this I understand in the .htaccess file is crucial for my site to function.
Can anyone give me anyone pointers?

Answer 1

It will convery to below url rewrite rule:
<rewrite>
<rules>
<rule name="Imported Rule 1" stopProcessing="true">
<match url="^(.+)$" ignoreCase="false" />
<conditions>
<!--##-->
<!--## If moving host, change the structure below to folder name of where public folder lives-->
<!--##-->
<!--##-->
<!--##-->
<!--##-->
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" negate="true" />
</conditions>
<action type="Rewrite" url="/foldername/public/index.php?url={R:1}" appendQueryString="true" />
</rule>
</rules>
</rewrite>

Answer 2

The RewriteBase directive sets the URL-path for relative path substitutions (overriding the directory-prefix). So, instead of using the RewriteBase directive, you could simply hardcode the URL-path in the RewriteRule directive itself.
For example:
RewriteRule ^(.+)$ /foldername/public/index.php?url=$1 [QSA,L]