How to Get loggedin user from session

Hi,

Please be more specific while asking a question.
What you have tried ? Provide at-least some code snippet so that we can figure out where you are making a mistake.

Assuming you are writing your own code to validate the user credentials,
after checking the credentials if they are valid please place the corresponding username in session by

session["name"]=username(may be username textbox.text)

wherever you wanna access it

if(session["name"]!=null)
{
lblUsername(your label name).text=session["name"].toString();
}

Hope this helps

Regards
Sriman