I have module in which I am rendering some html from a database via help of

Globals.NavigateURL(PortalSettings.ActiveTab.TabID, "ViewDetail", arrOfParams); 

Now on the PageLoad event of ViewDetail I wanted to rewrite the url of the currently visible page which is looking like

http://localhost/dnntrainingportal/GettingStarted/tabid/55/ctl/ViewArticleDetail/mid/462/Aid/1/Default.aspx

into some sort of

http://localhost/dnntrainingportal/MyTest.html where I am getting MyTest.html name from database

Is it possible

I were trying like  HttpContext.Current.RewritePath("/dnntrainingportal/MyTest.html", true);

but no use

I am not currently looking for any paid solution.Instead i wanted to find that from built in features of DNN is this possible or not?

What i simply want's to rewrite the url from the page name stored in my custom database

dnn does not natively support this level of url remapping .... even the dotnetnuke site itself uses ifinity to handle its url rewriting.  at a minimum you need a low level http handler to be able to capture thr entered url and redirect back to the targeted web page.  you could possibly manually make changes in the siteurl.config file to handle this with some regex ... but thus would need to be handled on a case by case basis for every instance of you module.

the added complication in your case would be if you really wanted the extensin to be .html instead of say ,aspx since this may need to be handled differently depending on which versin of iis and asp.net yiur site is running.