Can I use Page.IsPostBack from BasePage?

I have a web form page Default.aspx, which inherits from a BasePage class that I 开发者_高级运维created, which in turn inherits from System.Web.UI.Page. Very common setup.

Default : BasePage : System.Web.UI.Page

Within the BasePage.BasePage() (constructor), I want to do something if we're not doing a postback. So I put the standard

 if(!Page.IsPostBack)
 {
    // do stuff here
 }

However, Page.IsPostBack always returns false, even when I am really posting back.

My question, then, is this just a limitation of BasePage not being able to see the IsPostBack variable on the page level?

Or is there an extra piece I'm missing like when I must say HttpContext.Current.Request instead of just Request on the page level?

Don't put it in the constructor. The IsPostBack value is valid within the lifecycle events PreInit through Load.