title: Read an Excel spreadsheet in memory
body: <p>How can I read an Excel spreadsheet that was just posted to my server?
  I searched for something but I only found how to read an Excel spreadsheet with the file name path which is not my case.</p>
  
  <p>I need something like that:</p>
  
  <pre><code>public ActionResult Import(HttpPostedFileBase file)
  {
       var excel = new ExcelQueryFactory(file); //using linq to excel
  }
  </code></pre>