How to allow google to index folder and block all files in it?

hello,
I want google to index mysite.com/folder/
But i dont want any files/folders in it to be indexed.

For example, I dont want google to index any of the following.
mysite.com/folder/1.htm
mysite.com/folder/2.php
mysite.com/folder/2.html
mysite.com/folder/somefolder1/
mysite.com/folder/somefolder2/
mysite.com/folder/somefolder3/

how to make google to index only mysite.com/folder/ ?

=============
If I use mysite.com/folder/index.php instead of mysite.com/folder/
and use
User-agent: *
Allow:/folder/index.php

and
User-agent: *
Disallow: /folder/*

This can solve the problem.
But i dont want to use mysite.com/folder/index.php

So, is there any other solution ?

Thanks.

 

robots.txt is not so powerful than before.. sometimes, you cant control it... And, the page link juice will disappear... So, you can use a meta tag <META NAME="ROBOTS" CONTENT="NOINDEX, FOLLOW"> for those pages which you don't want goole index..
Best & Ideal robots.txt:
User-agent: *
Disallow:

Sitemap: http://www.yoursite.com/sitemap.xml

sorry for my bad english!

 

that's the best thing that i can also think of.. since you can apply it on just one page..

 

as written here, you can use the meta tag, you can also use the webmaster tools and you can use the robots,

anyway, your solution doesn't look good to me, you better put all files in other folder.