What Is Null Exception.

Question

what is null exception an how to control null exception in asp page?

Pankaj Kumar Choudhary · Answer

hello @Sunil NullReferenceException is common. It indicates that you are trying to access member fields or function types on an object reference that points to null. It indicates a flaw in the code. For better understanding you can refer below links: http://csharp.net-informations.com/string/string-null-cs.htm http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it

Santhakumar Munuswamy · Answer

Hi Sunil Kumar Try this below link http://www.dotnetperls.com/nullreferenceexception Ex. if(StringVariable!=null) { // do something here } Instead of that you can use below if(!String.IsNullOrEmty(StringVariable)) { // do something here }

Gowtham Rajamanickam · Answer

http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it

Gowtham Rajamanickam · Answer

http://www.dotnetperls.com/nullreferenceexception

Arunava Bhattacharjee · Answer

Null exception occurs when you try to access properties or method of an object using dot(.) notation if the object is not initialized or contain unknown(null) value. Null exception usually occurs if you have wrong logic in the code. Sometimes it is useful to leave the code as it is while developing the application. Otherwise please do a null check before performing an operation on an object which you think it might become null. if(obj!=null) { //perfrom operation obj.DoSomeStuff(); } else always put your potential code inside a try..catch..finally block and log a meaningful exception. Please mark the answer as accepted if you think it helped you.