I have the following code:
HttpCookie myCookie = new HttpCookie("PopMsgText");
myCookie.Value = message;
Response.Cookies.Add(myCookie);
It is giving NullReferenceException at the Response line. What could be the reason?
Asked
Active
Viewed 724 times
0
user1509
- 1,151
- 5
- 17
- 45
-
1Cookies collection is not initialized or response is null – Joanna Derks May 29 '12 at 12:22
-
Whre are you using this code? In a Page, User control? in an event handler? – JotaBe May 29 '12 at 12:23
-
where/what context you are executing this code? – Massimiliano Peluso May 29 '12 at 12:24
-
@JotaBe In a user control, at a link button click event. One user control is calling others user control's function. – user1509 May 29 '12 at 12:24
-
It's so strange... in that context Response should exists and Cookies must exists in the response. Which is the null object there? Response or Cookies? – JotaBe May 29 '12 at 12:30
-
Its resolved. I just changed Response.Cookies.Add(myCookie); to HttpContext.Current.Cookies.Add(myCookie); – user1509 May 29 '12 at 12:34
-
Possible duplicate of [What is a NullReferenceException and how do I fix it?](http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) – Nasreddine Oct 04 '15 at 09:10
1 Answers
2
Either the Cookies property or the Response object is null. This could happen depending on where you are calling this code. For example if you attempt to access the Response object in a background thread it might be null because there's no HttpContext associated to background threads.
Darin Dimitrov
- 1,023,142
- 271
- 3,287
- 2,928