asp.net mvc - Persist checkbox values on postback in MVC3 -

model:

  public class userviewmodel     {                public userdetail user { get; set; }         public list<int> selectedroles { get; set; }          } 

httpget action:

   public actionresult index()    {         viewbag.roles = list of roles (list<roles>)         return view();    } 

view:

@using (html.beginform("index", "home", formmethod.post)) {            foreach (var item in viewbag.roles)     {        <input id="selectedroles" name="selectedroles" type="checkbox" value="@item.id" >                @item.name     }       <input type="submit" value="submit"/>   } 

httppost action:

 [httppost]   public actionresult createuser(userviewmodel model, formcollection form)   {      foreach (int roleid in model.selectedroles)      {           here getting ids of selectedroles roleid      }   } 

on httppost want persist checkbox values have selected. how in mvc3?

it looks checkboxes bound property on viewbag. have re-assign roles on viewbag in post action, ui can rebound when view rendered after post action has executed. viewbag not persist between different view renderings, must reset