Question

• Got a Site.Master (Masterpage)
• Got Default.aspx (Page)
• And in the Default.aspx, there is a UserControl LoginUserControl.ascx placed

Now my problem:

In the LoginUserControl I check if Login is right.
If yes, then I set the Property IsLoggedIn on the Default.aspx to true:

    //Inside LoginUserControl.ascx
    if (/*Login is Ok*/)
    {
         ((Default)Page).IsLoggedIn = true;
    }

So, now I need this Information in my Masterpage Site.Master
I must know if User is logged in or not.. I do this:

    //Inside Site.Master
    protected void Page_Load(object sender, EventArgs e)
    {
        if (((Default)Page).IsLoggedIn)
        {
             //Do Something
        } 
    }

But its ALWAYS false! Why? I thought I set the IsLoggedIn = true ?! Why is it then false? Is it a Lifecycle problem and what I must do, that it works 🙁

Answer 1

You should add the property IsLogged on to the viewstate of the page.

public bool IsLoggedOn { 
    get { return ViewState["IsLoggedOn"]==null?false:Convert.ToBoolean(ViewState["IsLoggedOn"]); }
    set { ViewState["IsLoggedOn"] = value; }
}

Or if the property is used over multiple pages you should add it to the Session (replace ViewState with Session)