There's too much to try and explain in this little box, so I suggest you go through the articles on this site for examples.
You can search here
http://www.codeproject.com/search.aspx?sbo=kw[
^]
Or just google for asp.net examples or asp.net tutorials. There are many, many options to choose from.
If you then get stuck on something specific please come back and ask and we'll gladly help you out.