asp.net - Save control's (ASP Panel and children) state in cache -

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i'm looking easy , expandable way cache filter settings users. initial thought override save / load viewstate processes panel enclosing filter controls , save / load control state there. have not been able find way though.

is possible without altering state process of entire control, page, or site?

this seemed interesting case, i've taken shot @ solution accomplish functionality. i've come code below, should serve start. works "defaultproperty" of control, adding checks specific control types, cache , set property like.

additionally, sets control cached value on first load of page. not sure if want value of control change between postbacks reflect if user/session had made change.

using system.collections.generic; using system.componentmodel; using system.web; using system.web.ui; using system.web.ui.webcontrols;  public class cachedstatepanel : panel {     private static dictionary<string, object> cachedfilters     {                 {             if (httpcontext.current.cache["cachedfilters"] == null)             {                 httpcontext.current.cache["cachedfilters"] = new dictionary<string, object>();             }             return (dictionary<string, object>)httpcontext.current.cache["cachedfilters"];         }     }      protected override void createchildcontrols()     {         base.createchildcontrols();          if (!page.ispostback)         {             foreach (control child in controls)             {                 setfromcacherecursive(child);             }         }     }      protected override object saveviewstate()     {         var state = base.saveviewstate();          if (page.ispostback)         {             foreach (control child in controls)             {                 loadcachedstaterecursive(child);             }         }          return state;     }      private static void loadcachedstaterecursive(control current)     {         if ((current == null) || (current.id == null)) return;          var attribs = current.gettype().getcustomattributes(typeof(defaultpropertyattribute), true);         if ((attribs != null) && (attribs.length > 0))         {             var propname = ((defaultpropertyattribute)attribs[0]).name;             var prop = current.gettype().getproperty(propname);              if (prop != null)             {                 cachedfilters[current.id] = prop.getvalue(current, null);             }         }          if (current.hascontrols())         {             foreach (control child in current.controls)             {                 loadcachedstaterecursive(child);             }         }     }      private static void setfromcacherecursive(control current)     {         if ((current == null) || (current.id == null) || (!cachedfilters.containskey(current.id))) return;          var attribs = current.gettype().getcustomattributes(typeof(defaultpropertyattribute), true);         if ((attribs != null) && (attribs.length > 0))         {             var propname = ((defaultpropertyattribute)attribs[0]).name;             var prop = current.gettype().getproperty(propname);              if (prop != null)             {                 prop.setvalue(current, cachedfilters[current.id], null);             }         }          if (current.hascontrols())         {             foreach (control child in current.controls)             {                 setfromcacherecursive(child);             }         }     } }

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