Razor/MVC OnPostUpdate Model Class Instance always empty

[Chris]

I have a fairly simple Kendo Grid in a Razor page that posts to its Model via Ajax

All the parameter on the grid are set correctly (Forgery Token, etc). Also set the right camel case in startup.cs:

                .AddNewtonsoftJson(options => options.SerializerSettings.ContractResolver = new DefaultContractResolver())
                .AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null); 

The post successfully hits the OnPostUpdate function but the class only has empty members:

If I access the Form via the Request object (not the "request" object), I can see all members correctly posted but the "doesnotwork" instance only contains empty fields as if the deserialization did not work correctly.

        public JsonResult OnPostUpdate([DataSourceRequest] DataSourceRequest request, hrFeedback doesnotwork)
        {
            hrFeedback tFeedback=null;
            try
            {
                var t=CU.CGuid(Request.Form["FeedID"]);
                tFeedback = _context.tblFeedback.Where(s => s.FeedID == t).FirstOrDefault();
                if (tFeedback != null)
                {
                    tFeedback.Feedback = Request.Form["Feedback"];// feedback.Feedback;
                    tFeedback.FollowedUp = Request.Form["FollowedUp"]; // feedback.FollowedUp;
                    tFeedback.Subject = Request.Form["Subject"]; // feedback.Subject;
                    tFeedback.Unsubscribe = CU.CDate(Request.Form["Unsubscribe"]).DateTime; // feedback.Unsubscribe;
                    _context.tblFeedback.Update(tFeedback);
                    _context.SaveChanges();
                }
                else
                    return new JsonResult(Content("Feedback ID not found")); //Is there a better way to tell the grid that the update failed?
            }
            catch (Exception e)
            {

            }
            return new JsonResult(new[] { tFeedback }.ToDataSourceResult(request, ModelState));
        }

 

I also assume that my OnPostRead does not work right as I can see the filter/sort coming in via Request.Form["filter"] but the ToDataSourceResult seems not to take these values as the result on the page never shows filter or search results (always all rows are displayed)

        public JsonResult OnPostRead([DataSourceRequest] DataSourceRequest request)
        {
            var t = new JsonResult(_context.tblFeedback.ToDataSourceResult(request));
            return t;
        }

 

Can anybody tell me what I am forgetting?

I have another page that works just fine using the OnPostUpdate and its class value but I cannot see any difference between the two

 

Thanks

[Chris]

Update: Today I came into my office and magically it suddenly works. I have the feeling the "Entity Framework" is caching wrong information. 

How can I make sure the Entity Framework is up-to-date?

Thanks

[Nikolay]

Hi Chris,

Thank you for the update o nthe case.

This seems to be a problem with the local environmental setup rather than a Kendo UI related one. I can suggest you to refer to the Microsoft documentation page for "Entity Framework" inquiries.

Additionally, below I am posting a link to a Kendo UI article that provides solutions for common issues you might encounter while working with the Telerik UI Grid HtmlHelper for ASP.NET Core.

• https://docs.telerik.com/aspnet-core/html-helpers/data-management/grid/troubleshoot/troubleshooting

Let me know if you have any questions.

Regards,
Nikolay
Progress Telerik