how to test a website is vulnerable against SQL query injection attack ?

Question

I want to analyze vulnerability of a target website and i have only URL of that website and i am using asp.net . Kindly answer me in domain of ASP.NET

Comments

Answer probability increases if people knows who is asking question and what is his reputation. Anonymous question people like to ignore.

Coming to your question see if this helps
http://tech.queryhome.com/7864/how-to-avoid-sql-injection

Answer 1

This is very open question as you can not guarantee anything that site is safe. But would request you to see the following link it should be helpful.
http://thecybersaviours.com/how-to-find-out-if-a-website-is-vulnerable-to-sql-injection

Also remember one basic rule - avoid client side code to access the database as much as you can.

Answer 2

There is a lot of matetrial available on the web few links I would suggest to go through are -

http://www.softwaretestinghelp.com/sql-injection-%E2%80%93-how-to-test-application-for-sql-injection-attacks/
http://security.stackexchange.com/questions/39833/are-there-any-tools-for-scanning-for-sql-injection-vulnerabilities-while-logged

If you are looking for a tool then check sqlmap at http://sqlmap.org/