check for cookies

[mike parr]

I'm trying to do a check to see if the client browser has cookies
enabled. But my code below always gives me the value for acceptsCookies
= true, whether the machine has cookies enabled or not.

Can anybody help me out with this?
private void Page_Load(objec t sender, System.EventArg s e)
{
if (!(Page.IsPostB ack))
{
//check browser accepts cookies
HttpCookie checkCookies = new HttpCookie("che ckCookies");
checkCookies.Va lues["userName"] = "mike";
Response.Cookie s.Add(checkCook ies);

bool acceptsCookies = false;

if (Request.Cookie s["checkCooki es"].Values["userName"] == null)
{
acceptsCookies = false;
}
else
{
acceptsCookies = true;

//Delete test cookie
Response.Cookie s["checkCooki es"].Expires =
DateTime.Now.Ad dDays(-1);
}

lblInfo.Text = acceptsCookies ? "Accepts cookies" : "Doesn't accept
cookies";
}
}

Cheers,

Mike
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[bruce barker]

the only way to know if the broswe is accepting cookies, is to set a cookie,
send it to the browser, and have the browser post it back. on postback,
check to see if your cookie value is there, this is usually done with a
sniffer page for the site.

-- bruce (sqlwork.com)


"mike parr" <mp********@yah oo.co.uk> wrote in message
news:O6******** ******@TK2MSFTN GP09.phx.gbl...

I'm trying to do a check to see if the client browser has cookies
enabled. But my code below always gives me the value for acceptsCookies
= true, whether the machine has cookies enabled or not.

Can anybody help me out with this?
private void Page_Load(objec t sender, System.EventArg s e)
{
if (!(Page.IsPostB ack))
{
//check browser accepts cookies
HttpCookie checkCookies = new HttpCookie("che ckCookies");
checkCookies.Va lues["userName"] = "mike";
Response.Cookie s.Add(checkCook ies);

bool acceptsCookies = false;

if (Request.Cookie s["checkCooki es"].Values["userName"] == null)
{
acceptsCookies = false;
}
else
{
acceptsCookies = true;

//Delete test cookie
Response.Cookie s["checkCooki es"].Expires =
DateTime.Now.Ad dDays(-1);
}

lblInfo.Text = acceptsCookies ? "Accepts cookies" : "Doesn't accept
cookies";
}
}

Cheers,

Mike
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[Rasika Wijayaratne]

I think you need to set the cookie on one page and check it on another page. Otherwise you may get inaccurate results, I don't think its a problem with your code. I remember I had the same issue with classic ASP ages ago and had to do the same thing to resolve it. So just split your code into two pages as shown below and it will work

[Page1.aspx

HttpCookie checkCookies = new HttpCookie("che ckCookies")
checkCookies.Va lues["userName"] = "mike"
Response.Cookie s.Add(checkCook ies)
Response.Cookie s["checkCooki es"].Expires =DateTime.Now.A ddDays(1)
Response.Redire ct("Page2.aspx" )

[Page2.apx]
bool acceptsCookies = false

//Notice how I have changed Request.Cookies["checkCooki es"].Values["userName"] to Request.Cookies["checkCooki es"] below
// Or you *may* get a System.NullRefe renceException. I say *may* becuase i got it only in Mozilla 1.4 and not in IE6.0, weird
// With IE6.0 whether I blocked all cookies or not it was resolving to true, so I am not sure what is happening ther

if (Request.Cookie s["checkCooki es"] == null

acceptsCookies = false

els

acceptsCookies = true

//Delete test cooki
Response.Cookie s["checkCooki es"].Expires = DateTime.Now.Ad dDays(-1)
lblInfo.Text = acceptsCookies ? "Accepts cookies" : "Doesn't accept cookies"
References
http://msdn.microsoft.com/library/de...tcookies101.as

Rasik

[mike parr]

Rasika,

I've tried what you suggested and it still returns true whether or not
cookies are enabled or disabled or my machine. I've also tried the code
in the Microsoft link, and I get the same result :

http://msdn.microsoft.com/library/de.../en-us/dv_vste
chart/html/vbtchaspnetcook ies101.asp

Yet my old ASP code works fine at detecting whether cookies are enabled
or not. This is driving me crazy! Surely someone else has encountered
this problem before?
Mike

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[Doug]

When you say "whether or not cookies are enabled or disabled or my
machine" are you talking about disabling them in the browser? In IE?
In the Internet or Intranet zone? Because the Privacy slider used to
disable cookies in IE is only for the internet, not Intranet, which is
probably where your dev machine is located.

To disable cookies in Intranet zone, put http://localhost or
http://<machine name> into the Security Restricted Zones list.

mike parr <mp********@yah oo.co.uk> wrote in message news:<Oy******* *******@TK2MSFT NGP09.phx.gbl>. ..

Rasika,

I've tried what you suggested and it still returns true whether or not
cookies are enabled or disabled or my machine. I've also tried the code
in the Microsoft link, and I get the same result :

http://msdn.microsoft.com/library/de.../en-us/dv_vste
chart/html/vbtchaspnetcook ies101.asp

Yet my old ASP code works fine at detecting whether cookies are enabled
or not. This is driving me crazy! Surely someone else has encountered
this problem before?
Mike

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Don't just participate in USENET...get rewarded for it!