using sessions variable

In my master page, I'm loading a variable in the session like this:

public partial class TheMasterPage : System.Web.UI.MasterPage
{

    protected void Page_Load(object sender, EventArgs e)
    {

        if (!Page.IsPostBack)
        开发者_JAVA技巧{
            ViewUserPreferences SessionUserPreferences = new ViewUserPreferences();
            SessionUserPreferences = UserPreferences.GetUserPreferencesFromDB(6);
        }

    }

}

Then, in the code behind of a file, I have this:

protected void Page_Load(object sender, EventArgs e)
{

        if (!Page.IsPostBack)
        {
               var test = Session["SessionUserPreferences"];
         }
}

But when I debug, test is null. What's causing the problem?

Also, if I put a break point in the master page, it doesn't trigger when I run the aspx page; is this normal?

Thanks.

First thing you are missing the assignment part for UserPreferences.GetUserPreferencesFromDB(6) to the Session object. (I read the comments for @Greg's answer and you mentioned that even after that it is not working.)

Second, Master Page's Page_Load Event is triggered after the Current Page's Page_Load Event, hence the value of Session["SessionUserPreferences"] is null in Current Page's Page Load event since it is not set yet.

Check this link for further information on Page Events:

http://msdn.microsoft.com/en-us/library/dct97kc3.aspx

You have to do Session["SessionUserPreferences"] = something; somewhere before you attempt to retrieve that. Are you setting it somewhere else that you didn't show?