IEnumerable<Object> is null in HTTPPOST, while its available at the time of get RSS

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  akfkmupiwu

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  72 Posts

  IEnumerable<Object> is null in HTTPPOST, while its available at the time of get

  Apr 23, 2012 03:49 PM|LINK

  I have created a custom model binder

  public class ListModelBinder : System.Web.Mvc.IModelBinder
  {
  public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
  {
  // Get the raw attempted value from the value provider
  var incomingData = bindingContext.ValueProvider.GetValue("listComponent").AttemptedValue;
  return incomingData;
  //return incomingData.Split(new char[1] { ',' }).Select(data => TBLGRMAPCOMPONENT.Get().FirstOrDefault(o => o.Id == int.Parse(data))).ToList();
  }

  and registered this in Global.asax

   [HandleError]
          protected void Application_Start()
          {
              AreaRegistration.RegisterAllAreas();
              RegisterGlobalFilters(GlobalFilters.Filters);
              ModelBinders.Binders.Add(typeof(IEnumerable<TBLGRMAPCOMPONENT>), new ListModelBinder());
              RegisterRoutes(RouteTable.Routes);
          }

  
  But this is not available in

  bindingContext.ValueProvider.GetValue("listComponent").

  Its null here

  My View Code

  public class ConfigurationController : Controller
      {
          private ConfigModelEFEntities db = new ConfigModelEFEntities();
          public ActionResult Configuration()
          {
  
              DirectoryInfo directory = new DirectoryInfo(Server.MapPath(@"~\Views"));
              var dirs = directory.GetDirectories();
  
              List<TBLGRMAPCOMPONENT> tblist = new List<TBLGRMAPCOMPONENT> { };
              tblist = db.TBLGRMAPCOMPONENTs.ToList();
  
              TBLGRMAPCOMPONENT temp=new TBLGRMAPCOMPONENT();
  
              foreach (var dir in dirs)
              {
                  foreach (var item in dir.GetFiles("*.cshtml"))
                  {
                      temp=new TBLGRMAPCOMPONENT();
  
                      temp.ISSELECTED = 0;
                      
                      temp.MODULENAME = dir.Name;
                      temp.CONTROLLERNAME = temp.MODULENAME;
  
                      temp.COMPONENTNAME = item.Name.Split('.').ToArray()[0];
                      temp.DEFAULTACTIONNAME = temp.COMPONENTNAME;
  
                      tblist.Add(temp);
                      db.AddToTBLGRMAPCOMPONENTs(temp);
                  }
              }
              TryUpdateModel(db.TBLGRMAPCOMPONENTs);
              UpdateModel(db);
              return View(tblist);
          }
  
  
          [HttpPost]
          public ActionResult Configuration(IEnumerable<TBLGRMAPCOMPONENT> listComponent)
          //save logic

  AnilKr
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  ignatandrei

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  Re: IEnumerable<Object> is null in HTTPPOST, while its available at the time of get

  Apr 24, 2012 06:00 AM|LINK

  akfkmupiwu

  public ActionResult Configuration(IEnumerable<TBLGRMAPCOMPONENT> listComponent)

  MVC does not know( and neither you!) how to create an Interface. What particular class should be using?

  Replace with List<TBLGRMAPCOMPONENT>
  More, you do not need a custom model binder - see http://haacked.com/archive/2008/10/23/model-binding-to-a-list.aspx

  My .NET blog : http://msprogrammer.serviciipeweb.ro/ |2012 Programmer tools
  • Marked as answer by akfkmupiwu on Apr 24, 2012 06:50 AM