Suggest you take a look at Microsoft's FREE Web Matrix product.  It is
kind of a lite development tool, similar to but less powerful than
Visual Studio.NET.   It has some templates that will help you build such.

See  http://www.asp.net/webmatrix/default.aspx?tabIndex=4&tabId=46

At the left corner is an FREE online tutorial. There is a forum for help.

You are in for a bit of a learning curve if coming from Access database
development.  I am still in the steep part of the learning curve.  Two
books on web matrix help (try the used vendors on Amazon's site).

If you want a slick easy to use table editor - edit any number of tables
in a database, add, edit and delete without any special formatting or
validation, consider getting DataSet Editor.  Free to try $19 to
license.  A bit easier than using the templates in Web Matrix.

http://mayers.us/MayerSoft/DataSetEditor.aspx

And finally, a really nice program, free (for the lite version), which
generates "grids" to do list, add, edit and delete - -  RapTier

It generates add/change/delete programs from an Access database.

http://www.sharppower.com/

Their lite version is free.
I found it very easy to use.  And it is one of the few generators which
worked first time.

My biggest issue has been with the commercial server I am trying to use.
 Having problems getting detailed error messages.

Also I found getting to identify the actual path of the database, when
you put it on a commercial server you don't control, a bit difficult.  I
finally learned about the mappath command and how to use it.

Good luck.

Bob

What is the format of the web server? Depending on the technology it
supports, you could use ASP or JSP to make the connection to the
database and write a few simple web pages for the data entry.