How to convert Multilevel numbering list from Word document into text value in HTML

I am reviewing multiple Rich Text Editors to find the right one for a VB.NET web application which has IE11 incompatible Rich Text Editor.

With the IE11 compatibility, the most important requirement from clients is a functionality that copies contents from Word documents over into text editor without losing it Word formatting. (The content will be saved into database and be read by MS Word again)

However, all the Rich Text Editors that I have reviewed do not support the multilevel list formatting correctly. They change the multi-level numbers into single level numbers when coping the multi-level list from Word into them. - Rad Editor, CKEditor, tiny-mce and Rich Text Editor and so on.

Example,

1. A
  1.1. B
  1.2. B
    1.2.1. C
2. A
  2.1. B
  2.2. B

becomes

1. A
  1. B
  2. B
    1. C
2. A
  1. B
  2. B

I found a CSS trick to display <li> tag as multilevel numbers in the browser, but the numbers are not actual text values that can be saved into database. So, I need another solution that can save numbers and their format into the database like the current Rich Text Editor in my VB.Net web application. (It is a DLL, but not JavaScript library)

Can I get some helps/advices how to resolve this problem when copying over multi-level numbering list from Word into the RichTextEditor?

Thanks for answering in advance.

via Chebli Mohamed