Home/ Questions/Q 849725
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-15T07:08:59+00:00

I have public variable ‘MessagePlaceholder’ on MasterPage and a Class that accesses this property

  • 0

I have public variable ‘MessagePlaceholder’ on MasterPage and a Class that accesses this property like that setting it’s value to string from getMessage();

((HttpContext.Current.Handler as System.Web.UI.Page).Master as MasterPage).MessagePlaceholder = getMessage();

which gives me an error like this one

Error 3 ‘System.Web.UI.MasterPage’ does not contain a definition for ‘MessagePlaceholder’ and no extension method ‘MessagePlaceholder’ accepting a first argument of type ‘System.Web.UI.MasterPage’ could be found (are you missing a using directive or an assembly reference?)

What should i do ?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You have added the variable MessagePlaceHolder in your masterpage. That means you have extended the functionality of a standard Masterpage.

    You have to cast the Master property to your type of the Masterpage.

    ((MyMasterClass)((Page)HttpContext.Current.Handler).Master).MessagePlaceHolder = getMessage();

    or in VB.Net

    DirectCast(DirectCast(HttpContext.Current.Handler, Page).Master, MyMasterClass).MessagePlaceHolder = getMessage()
    • 0