Http Cookie

Never read a cookie from Response. It creates a new (blank) cookie and overwrites a cookie with the same name even if there's value in it. Learned the hard way. 


-------------Writing a cookie (write to a Response)----------------

HttpCookie visitorCookie = new HttpCookie(tracker.GetVisitorMultivariateTestCookieName());

visitorCookie.Value = runningTest.ID.ToString();

visitorCookie.Expires = DateTime.Now.AddYears(10);

HttpContext.Current.Response.Cookies.Add(visitorCookie);

----------Reading a cookie (read from the Request) -----------------

public override bool TryGetRunningVisitorTestFromCookie(out TestDefinitionItem test)

{

      string testId = string.Empty;

      try

            {

                //cookie exists and contains value

                if (!string.IsNullOrEmpty(HttpContext.Current.Request.Cookies[_VisitorTestCookieName].Value))

                {

                    Item testItem = Sitecore.Context.Database.GetItem(HttpContext.Current.Request.Cookies[_VisitorTestCookieName].Value);

                    if (testItem != null)

                    {

                        test = new TestDefinitionItem(testItem);

                        if (test.IsRunning)

                        {

                            return true;

                        }

                    }

                }

            }

            catch (Exception ex)

            {

                Log.Error("Error reading a Visitor Multivariate Test cookie ", ex, this);

                test = null;

                return false;

            }

            test = null;

            return false;

        }