page viewstate

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

How come I can use the following line in my page_load
ViewState["abc123"] = "xxxx"

But when I try the same line of code in another function I get the following compile error
An object reference is required for the nonstatic field, method, or property 'System.Web.UI.Control.ViewState

Do I need to reference ViewState some how thru the HttpContext.current ???
 
When you access it through Page_Load it is intrinsically available. Can you
send an example of the code where ViewState is not available?

jzink said:
How come I can use the following line in my page_load:
ViewState["abc123"] = "xxxx";

But when I try the same line of code in another function I get the following compile error:
An object reference is required for the nonstatic field, method, or
Click to expand...
property 'System.Web.UI.Control.ViewState'
 
Do you mean another function or another class? The Page class inherits
System.Web.UI.Control. The ViewState property is a property of the base
class, so in any class that inherits System.Web.UI.Control has a ViewState
property. If you're referring to a method in a non-Control class, such as a
Class Library, you would have to get the ViewState from the
System.Web.HttpContext.Current.Handler class. This class is an iHttpHandler
class, so you would need to cast it as a System.Web.UI.Page class. Example:

((System.Web.UI.Page)
System.Web.HttpContext.Current.Handler).ViewState["abc123"] = "xxxx";

--
HTH,
Kevin Spencer
..Net Developer
Microsoft MVP
Big things are made up
of lots of little things.

jzink said:
How come I can use the following line in my page_load:
ViewState["abc123"] = "xxxx";

But when I try the same line of code in another function I get the following compile error:
An object reference is required for the nonstatic field, method, or
Click to expand...
property 'System.Web.UI.Control.ViewState'
 
I was hoping to do exactly as you describe (i.e., access the ViewState
from a class), however, when I implement the code you suggest, I get the
following compile-time error:

'System.Web.UI.Control.ViewState' is
inaccessible due to its protection level

Could you kindly provide an explanation for how to get around that? Many
thanks in advance.
 
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