Aspnet Mvc/Helpers/Grid/Ajax-editing

[Gusev]

Hello!
I have one questons!

I use help from 
http://docs.kendoui.com/getting-started/using-kendo-with/aspnet-mvc/helpers/listview/editing

and why if I use "public ActionResult Editing_Create"
 I need return 

return Json(new [] { product }.ToDataSourceResult(request, ModelState));

but if I use public ActionResult Editing_Update
I need return 

return Json(ModelState.ToDataSourceResult());

In my project,when I use 

return Json(ModelState.ToDataSourceResult());

for my Update Method...I get "ModelState.ToDataSourceResult = null", and if I use first example, I get what I need

Please help!
Give me please some explanation
And sorry for my bad English

[Nikolay Rusev]

Hello Gusev,

 
When you create new items they must be returned back to client in order be accepted from the DataSource. This however is not required when you update items.

The ModelState in both cases must be returned as this is one of the indicators whether the server operations has succeeded or failed.

Regards,
Nikolay Rusev
the Telerik team

[Ernesto]

Hellow Gusev,

I have been also struggling with this and I just found this links that might be useful to you (and all of us).

- http://www.kendoui.com/forums/mvc/grid/edit-problems-with-2013-1-319.aspx
- http://www.kendoui.com/forums/mvc/general-discussions/update-destroy-operations-trigger-the-error-event-of-the-datasource-after-updating-to-q1-2013-(v-2013-1-319).aspx