c# - Looping through children controls inside Updatepanel -

i have written method loops through properties of object , maps them controls have same name (or prefix + name). issue have controls inside update panel (drop down lists change when different option selected) not being found when running through method. read this , adapted method below accommodate that, still not find controls inside update panel. controls have ids , runat="server".

public static void mapobjecttopage(this object obj, control parent, string prefix = "") {     type type = obj.gettype();     dictionary<string, propertyinfo> props = type.getproperties(bindingflags.public | bindingflags.instance).todictionary(info => prefix + info.name.tolower());      controlcollection thecontrols = parent updatepanel ? ((updatepanel)parent).contenttemplatecontainer.controls : parent.controls;      foreach (control c in thecontrols)     {         if (props.keys.contains(c.clientid.tolower()) && props[c.clientid.tolower()].getvalue(obj, null) != null)         {             string key = c.clientid.tolower();             if (c.gettype() == typeof(textbox))             {                 ((textbox)c).text = props[key].propertytype == typeof(datetime?)                     || props[key].propertytype == typeof(datetime)                     ? ((datetime)props[key].getvalue(obj, null)).toshortdatestring()                     : props[key].getvalue(obj, null).tostring();             }             else if (c.gettype() == typeof(htmlinputtext))             {                 ((htmlinputtext)c).value = props[key].propertytype == typeof(datetime?)                     || props[key].propertytype == typeof(datetime)                     ? ((datetime)props[key].getvalue(obj, null)).toshortdatestring()                     : props[key].getvalue(obj, null).tostring();             }             //snip!         }         if (c updatepanel         ? ((updatepanel)c).contenttemplatecontainer.hascontrols()         : c.hascontrols())         {             obj.mapobjecttopage(c);         }     } } 

try add 2 methods new or existing class:

    public static list<control> flattenchildren(this control control)     {         var children = control.controls.cast<control>();         return children.selectmany(c => flattenchildren(c).where(a => label || literal || button || imagebutton || gridview || hyperlink || tabcontainer || dropdownlist || panel)).concat(children).tolist();     } 

    public static list<control> getallcontrols(control control)     {         var children = control.controls.cast<control>();         return children.selectmany(c => flattenchildren(c)).concat(children).tolist();     } 

you can call getallcontrols method updatepanel parameter (or main container). method returns children of 'control' parameter. also, can remove clause retrieve controls (not of type).

i hope you!