Make Html Editor

There are many sample editors already. Start by looking for relevant articles in this web site. There are many challenges that would be difficult to solve if you try to do all of it yourself.

One problem is that there are variety of browsers, most of which that do not work exactly the same. So if you use existing samples and/or libraries then that problem is essentially solved already by someone else.

Also, some editors work in the server and some in the client. Editors that work in the server require bandwidth and quick response times.

You can make an ASP.NET page which edits styles in a way. For example, user would be able to select color for some type of elements, but would not be able to write things like: background-color: Red. Or otherwise user would be able to completely destroy overall site visuals using injection.

Once user writes whatever he wants, your ASP.NET would build records in database, so that once user opens the page which should be affected by those styles, page contains styles created from database rather than hardcoded.

Zoran

You can make an ASP.PAGE which edits styles in a way. For example, user would be able to select color for some type of elements, but would not be able to write things like: background-color: Red. Or otherwise user would be able to completely destroy overall site visuals using injection.

Once user writes whatever he wants, our ASP.NET would build records in database, so that once user opens the page which should be affected by those styles, page contains styles created from database rather than hardcoded.

Zoran