How can i change the value of the cookie?

Question

2.00/5 (1 vote)

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I am trying to change the value of the cookie when the LOGOUT button is pressed like this...

Request.Cookies["LoginInfo"].Value=null;

or

Request.Cookies["LoginInfo"].Value="0";

I am unable to change the value of cookie...
is there any way to change the value at any time...
plz help...

Posted 29-Mar-11 10:52am

haseebsvirgo

Updated 29-Mar-11 10:54am

Wendelius

v2

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3 solutions

Solution 3

On The Care and Handling of Cookies[^]

Posted 29-Mar-11 16:29pm

Chris Maunder773K

Comments

AspDotNetDev 29-Mar-11 23:56pm

A practical article that goes into good detail about cookies without getting too abstract or technical. Your answer doesn't cover the OP's specific issue, but that's ok since mine already does. 5.

Solution 1

Perhaps you need to set the expiration of the cookie to be in the future. Also, set the response, not the request:

C#

Response.Cookies["LoginInfo"].Expires = DateTime.Now.AddDays(1);

http://msdn.microsoft.com/en-us/library/ms178194.aspx (ASP.NET Cookies Overview)

Posted 29-Mar-11 12:36pm

AspDotNetDev

Comments

Venkatesh Mookkan 29-Mar-11 22:18pm

You are changing the Cookie Expiration here. How this help the OP to fix his issue?

It should be Response.Cookies["LoginInfo"].Value = 0.

But you the gave the idea about Response object at lease.

AspDotNetDev 29-Mar-11 23:52pm

Did you notice the part where I said "also, set the response, not the request"? And I wasn't sure what happens when the cookie expiration is not set (does it expire right away, is it infinite?), so I recommended the OP explicitly set that as well, as that couldn't hurt.

Venkatesh Mookkan 29-Mar-11 23:55pm

The OP is using LoginInfo value for checking the validity of the Cookie. So, expiration doesn't make sense in his case.

AspDotNetDev 29-Mar-11 23:53pm

From the article Chris Maunder posted a link to in an alternate answer: "If you just set a cookie's value then it will create a cookie with Expires set to DateTime.MinValue (01-Jan-0001 00:00)".

Venkatesh Mookkan 29-Mar-11 23:55pm

The OP is using LoginInfo value for checking the validity of the Cookie. So, expiration doesn't make sense in his case.

AspDotNetDev 30-Mar-11 0:01am

One could assume that, though the OP might actually be setting it to a value to see if the user has logged out (i.e., that the user was previously logged in). On the website I manage, we do something similar and just show the user's name but don't give them permissions once they log out. In any event, setting the expiration won't hurt. In fact, if the OP sets the expiration in the past, that would actually help to delete the cookie value (my example sets it to the future as the OP sounded more interested in changing the value that removing the value).

Venkatesh Mookkan 30-Mar-11 0:07am

One thing you should understand that I am not against you.

Most of the people asking questions here are Novice. If you give the right solution that is good. Give the solution and the suggestion (like your answer) that is very good.

But only suggestion would make them crazy in terms of coding. I guess you understand my point. You can improve your answer at any point of time (which you already know).

AspDotNetDev 30-Mar-11 0:48am

Are you saying I didn't give the "right solution"? I did, I just didn't write the code for it. And the addition of setting the expiration date may be crucial, though we can't know that given the info we have been given (e.g., was the cookie value set previously, how is the OP detecting value changes, were they able to actually set the value in the first place, and so on).

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Bryian Tan · Accepted Answer · 2011-03-29T14:09:00

Solution 2

Hello,

You can try something like

C#

Response.Cookies["LoginInfo"].Value = "0";

Posted 29-Mar-11 14:09pm

Bryian Tan

Updated 29-Mar-11 16:19pm

v2

Comments

AspDotNetDev 29-Mar-11 20:57pm

FYI, that's part of what I said.

Bryian Tan 29-Mar-11 21:54pm

oops, sorry you are right, I was focusing on the highlighted section.