Introduction:
Here I will explain how to check the username availability using asp.net Ajax .
Here I will explain how to check the username availability using asp.net Ajax .
Description:
I designed one registration page in that user will enter userdetails like username, password etc at the time of enter username in textbox I need to validate the username whether that username available or already taken by any other user for that I am checking username availability in database based on username. Here I am getting one problem that is after enter username in textbox I am getting the data from database and showing the result on page like whether that username available or not but at that time page gets postback and losing the entered values in textboxes for that reason I used ajax concept to check username availability.