Add complete url to Database while adding record using C# in ASP.Net

hi

I used ckeditor that I can insert image on it and when click button it will save in database:

<p><img alt="" src="/ckfinder/userfiles/images/101.JPG" style="height:125px; width:200px" /></p>

here  src is:

/ckfinder/userfiles/images/101.JPG

but I want it save src like:

http://www.mysite.com/ckfinder/userfiles/images/101.jpg

how I can do it?

Best regards

Neda