How to convert word documents to html page in sharepoint online 2013

Question

Hi,
I am new SharePoint and still learning it.
I have been tasked to do the following on office 365 E3 SharePoint 2013 Online edition.
1) I have to create a Web page in asp.net
2) This page needs to show document from a given SharePoint folder and bind them in a grid or dropdown on the asp .net web page
3) On selecting the document from the drop down or gird (on asp .net webpage), I need to show the SharePoint word document as HTML on the webpage (something like word to html) Note: These SharePoint word document may contain Images, bullets, tables etc. 
What I have been able to do till now
1) I have been able to connect to SharePoint from ASP .net application.
2) I have been able to retrieve document from a specific SharePoint folder.
3) Read the document from SharePoint folder and bind them to a drop down on the asp .net page.
What is missing?
I am not aware about any API that SharePoint Online provides to convert Word document to HTML. Any code sample or reference on how to will be much appreciated. 
I am not also not sure what is the best way of achieving the functionality this?
Thanks 
Krishna

Answer 1

If this was SharePoint server then it would be easy however in O365 You need to create a app which will use the word automation service and below is  powershell which you can use for the conversion:-
# This script will convert Docx to PDF using word automation and similarly it can be used to convert to HTML
$wordFile="http://contoso/kick.docx"
$pdfFile="http://contoso/kick.pdf"
$wasp = Get-SPServiceApplicationProxy | where { $_.TypeName -eq "Word Automation Services Proxy" }
$site = Get-SPSite "http://contoso"
$ConvertJob = New-Object Microsoft.Office.Word.Server.Conversions.SyncConverter($wasp)
$ConvertJob.UserToken = $site.UserToken
$ConvertJob.Settings.UpdateFields = $false
$ConvertJob.Settings.OutputFormat = "PDF"
$ConvertJob.Convert($wordFile, $pdfFile)