My requirement is to have database based help system for asp.net website, as shown in the image below. i have searched web but could not find even remotely related solution.

My requirement is to have database based help system for asp.net website, as shown in the image below. i have searched web but could not find even remotely related solution.

You could assign each help item a unique ID (perhaps GUID to make it easier to generate by the developer enabling help for that item).
Clicking on the link opens a dialog, tooltip, new window, whatever. Just have the UI load the help text by ID from the database.
To make this easier to implement in the UI, there are a few ways. Perhaps you can create a jQuery client-side behavior.
your HTML would look something like:
<span class="help" id="#{unique-id-here}">Admin</admin>
and you could have jQuery on DOM load:
$(function() {
var help = $(".help");
help.prepend("<img src=\"path/to/images/help.png\" />");
help.click(function() {
//do something with this.id; open a popup, a title bar, whatever.
}
});
We did it on our site by doing the following:
We add the usercontrol to the aspx page where appropriate
<uc2:titleandhelp ID="titleandhelp1" runat="server" HelpContext="4" PageTitle="Forgot Password" />
it may sound like a lot of work, but really it only takes a half hour or so to do all of the setup. The rest of the work lies in populating the table and dragging the usercontrol onto the pages where appropriate.