Develop Reference

Cookie reading value is null

I am using VS2015, C#.
My cookie value is:
Provider=Custom&Email=someemail#gmail.com&UserName=John&FirstName=Test&LastName=LastTest&Expires=11.7.2016
11:03:05
I am trying to get this value with:
HttpContext context = HttpContext.Current;
HttpCookie cookie = context.Request.Cookies["Login"];
string provider = cookie["Provider"];
string email = cookie["Email"];
both provider and email are null. How can I get values from cookie?
EDIT
Cookie is saved with:
HttpCookie cookie = new HttpCookie("Login");
cookie["Provider"] = "Custom";
cookie["Email"] = "test#gmail.com";
Response.Cookies.Add(cookie);
SECOND EDIT
I think the problem is encryption. I am using my own encrpytion mechanism. Cookie.value looks fine after decryption, but Cookie.Values is a little bit different than original. I think that's the problem.
Cookie.Value (before encryption): Provider=Custom&Email=test#gmail.com
Cookie.Value (after decryption): Provider=Custom&Email=test#gmail.com
Cookie.Values (before encryption) :{Provider=Custom&Email=test%40gmail.com}
Cookie.Value (after decryption - is different): {Provider%3dCustom%26Email%3dtest%40gmail.com}

Try below
HttpCookie cookie1 = Request.Cookies["Login"];
if (cookie1 != null)
{
string provider = cookie1["Provider"].ToString();
string email = cookie1["Email"].ToString();
}

Response cookie not updating

When I log I create the following cookie:
HttpCookie cookie = new HttpCookie("Ortund");
// insert cookie values
cookie.Expires = DateTime.Now.AddMonths(1);
Response.Cookies.Add(cookie);
When I request data from this cookie, I use Request.Cookies:
string username = Convert.ToString(Request.Cookies["Ortund"]["Username"]);
When i log out, I do this:
HttpCookie cookie = new HttpCookie("Ortund");
cookie.Expires = DateTime.Now.AddMonths(-1);
Response.Cookies.Add(cookie);
For some reason, now I'm sitting with a cookie that has an expiry date of 0001-01-01 12:00:00 AM in Request.Cookies["Ortund"] and the expiry date of the cookie doesn't change no matter how many times I log in.
Have I done something wrong here? Is this even close to how it should be done?

In your logout you are creating a new instance of the cookie. Also you are using Response.Cookies.Add which may allow multiple cookies of the same name to be appended to the Response.
I would suggest you to check the Request for the cookie key and if it doesn't exist add the cookie.
For updating the cookie, first get the existing cookie object and use Response.SetCookie to update the value.
Code
set
if(!Request.Cookies.AllKeys.Contains("Ortund"))
{
HttpCookie cookie = new HttpCookie("Ortund");
// insert cookie values
cookie.Expires = DateTime.Now.AddMonths(1);
Response.Cookies.Add(cookie);
}
update
if (Request.Cookies.AllKeys.Contains("Ortund"))
{
HttpCookie cookie = Request.Cookies["Ortund"];
cookie.Expires = DateTime.Now.AddMonths(-1);
Response.SetCookie(cookie);
}

C# multi-value cookies not working

Hi I am creating a cookie in the following way:
HttpCookie cookie = new HttpCookie("CookieNameHere");
cookie.Values["test1"] = "Value1";
cookie.Values["test2"] = "Value2";
cookie.Values["test3"] = "Value3";
//I have also tried cookie.Values.Add("test1", "Value1");
cookie.Expires = DateTime.Now.AddDays(365d);
HttpContext.Current.Response.AppendCookie(cookie); //here I have also tried HttpContext.Current.Response.Cookies.Add(cookie);
but when I read out the cookie using the following code:
HttpCookie cookie = new HttpCookie("CookieNameHere");
cookie = HttpContext.Current.Response.Cookies["CookieNameHere"];
I always get that the cookie.Values is empty
Is there something I am doing wrong here?

Normally you would write the cookie in a Response, and then read it from subsequent Requests.
I see you're trying to read it from the Response - is this within the context of the same HTTP request, or just a typo?
Try
HttpCookie cookie = HttpContext.Current.Request.Cookies["CookieNameHere"];

You have to ask for those Cookies in a Request.
HttpCookie cookie = Request.Cookies["CookieName"];

How to get the cookie value without page refresh

I am setting cookie value in a usercontrol[A] and reading the value in the another usercontrol [B].
But the value is only available on page refresh in the server side. I can see the updated value in firebug cookie tab.
If i refersh the page the correct value is diplaying inthe page.
How to fix this issue?Below is the code i am using to read the cookie in usercontrol[B].
Its always the old value not the new value that i set in the usercontrol[A]
HttpCookie cookieTool = Request.Cookies["previousTool"];
string strSessionReturnToolTitle = "";
string strSessionReturnToolURL = "";
if (cookieTool != null)
{
// Response.Write("<BR>Cookie value " + cookieTool["returnToolurl"].ToString());
if (Request.UrlReferrer == null)
{
cookieTool.Expires = DateTime.Now.AddDays(-1d);
Response.Cookies.Add(cookieTool);
}
else
{
strSessionReturnToolTitle = cookieTool["returnTooltitle"];
strSessionReturnToolURL = Server.UrlDecode(cookieTool["returnToolurl"]);
}
}

Request.Cookies is incoming. Response.Cookies is outgoing.
Request.Cookies only knows about the current request. I don't think it updates until the following request when you add via Response.Cookies.
You could try getting the cookie via Response.Cookies["previousTool"] in case Request.Cookies["previousTool"] is null.
If that doesn't work you'll need another way, such as storing the value in the Session or HttpContext.Current.Items.

Delete cookie on clicking sign out

I am creating the cookie using the code below, How to read the txtusername value in another page and how to delete the cookie when I click sign out(code for sign out). I am new to programming please help.
string cookiestr;
HttpCookie ck;
tkt = new FormsAuthenticationTicket(1, txtUserName.Value, DateTime.Now,
DateTime.Now.AddMinutes(30), chkPersistCookie.Checked, "your custom data");
cookiestr = FormsAuthentication.Encrypt(tkt);
ck = new HttpCookie(FormsAuthentication.FormsCookieName, cookiestr);
if (chkPersistCookie.Checked)
ck.Expires = tkt.Expiration;
ck.Path = FormsAuthentication.FormsCookiePath;
Response.Cookies.Add(ck);

You should never store password as a cookie. That's a very big security threat. To delete a cookie, you really just need to modify and expire it. You can't really delete it, i.e. remove it from the user's disk. Check out this documentation.
Here is a sample:
HttpCookie aCookie;
string cookieName;
int limit = Request.Cookies.Count;
for (int i=0; i<limit; i++)
{
cookieName = Request.Cookies[i].Name;
aCookie = new HttpCookie(cookieName);
aCookie.Expires = DateTime.Now.AddDays(-1); // make it expire yesterday
Response.Cookies.Add(aCookie); // overwrite it
}

You cannot directly delete a cookie, you have to set it to expire before the current date:
if (Request.Cookies["clienDetails"] != null)
{
HttpCookie myCookie = new HttpCookie("clienDetails");
myCookie.Expires = DateTime.Now.AddDays(-1d);
Response.Cookies.Add(myCookie);
}
You can read more about it here.
Furthermore I really encourage you to not write your own security but to read up on asp.net membership. More secure and easier to use. As I can see many flaws in your security model. Storing the password in plain text in a cookie is really really bad.
EDIT:
As you now changed your code, you have to do this to remove the cookie:
if (Request.Cookies[FormsAuthentication.FormsCookieName] != null)
{
HttpCookie myCookie = new HttpCookie(FormsAuthentication.FormsCookieName);
myCookie.Expires = DateTime.Now.AddDays(-1d);
Response.Cookies.Add(myCookie);
}

FYI this did not work for me using Chrome 69 with the Continue where you left off feature enabled. Similar issue with Firefox. Disabling this feature worked for me.
See
Chrome doesn't delete session cookies
How to delete or expire a cookie in Chrome using Asp.Net

In my case this code worked:
Response.Cookies.Delete("access_token");
return Ok();