Write cookies from subdomain and read from another subdomain without changing web.config

I have a simple question. I have two different projects like




. As it’s name suggests, I login from login project and response redirect to test project.

I am able to create cookie for login.mydomain.com but I can not read it from test.mydoamin.com.
My question is can I create cookie from login.mydomain.com to www.mydomain.com and read it from test.mydomain.com as if I am reading it from www.mydomain.com.

This is how I create my cookies.

Response.Cookies["UserValidForMyDomain"].Value = myvalue;
Response.Cookies["UserValidForMyDomain"].Expires = dtExpireDate;

and how I read them.

string myValue = Request.Cookies["UserValidForMyDomain"].Value;

Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

Solution 1

No, but you can create a wildcard cookie for the domain of .mydomain.com which will allow any subdomain to read/write it.

Solution 2


HttpCookie hc = new HttpCookie("key", "value");
hc.Domain = ".mydomain.com";
hc.Expires = DateTime.Now.AddMonths(3);



Solution 3

In php this will do session_set_cookie_params

In asp and equivalent, these stackoverflow thread might be usefull

How to share session among Multiple Domains on single asp.net website?

How can you keep a session across multiple subdomains in c# mvc?

Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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