I have a MVC Core project which has a Grid.  It is a hierarchal grid with a child grid.  Combined they show your basic orders and history of orders.  The grid fully populates and pages.  My problems lie with the editing side of things.

I am using a pop up editor.  A editor template is used and effectively gathers users edits.  The update side of things works flawlessly.  By this I mean you click Edit, the edit occurs, you press the save and the database gets updated.  The update method receives the "model" values entered during the edit action.  This is "as expected".

My problem exists with the Create action.  Both the Update and Create use the same editor.  Visually the Create editor accepts user input however when the "Create" action is called, the server method receives a model with null values for all the values entered.  Not a single entered value is returned in the model.  No errors are present in the developer console., non are occurring in any code I have control over.  I simply cannot explain the lack of values in the model.

I have compared the "Request.Form" values in the Update vs Create methods.  My Update methods request has FORM values in approximately 107 keyvalue pairs.  When the Create methods are used it gets 47 items.  Those 47 are all the default values of the model.  (I added default values to the datasource model to test this.  Those values arrive in the model, not the entered values)

Can anyone point me to the differences between the Update/Create actions?  Can anyone point me to a path to find/solve my problem?

Thanks for any suggestions.

Hi,

We have a Kendo Grid bound to a ViewModel with a string value that can be null. If we use NullValueHandling.Include in our MVC project Startup NewtonsoftJson.SerializerSettings:

.AddNewtonsoftJson(o =>
{
    o.SerializerSettings.ContractResolver = new DefaultContractResolver();
    o.SerializerSettings.NullValueHandling = NullValueHandling.Include;
})

this results in the null value being included in the Grid Multi Filter (see attached). If we use NullValueHandling.Ignore, this results in no value being included in the Grid Multi Filter and we can't filter on empty values. This seems odd, as the Grid is bound to a ViewModel which has the property declared on it. In KendoReact Grids, the value is correctly included in the Grid Multi Filter as 'undefined'  when using NullValueHandling.Ignore e.g. https://stackblitz.com/edit/react-ycmafw?file=app%2Fproducts.json.

1. Is there any way to force the ASP.NET Core Grid to include the property as undefined?
2. If not, is there any way to add a custom item to the Grid Multi Filter list that will match undefined values?

Kind regards,

David

Say I am uploading an Image - k-file-preview shows this link --> https://demos.telerik.com/aspnet-mvc/imagebrowser/thumbnail?path=thumbnail1.jpg
and upon insert the image into the editor the image url shows as --> https://demos.telerik.com/aspnet-mvc/content/userfiles/images/thumbnail1.jpg

does this mean we have thumbnails for the uploaded image stored in another folder, and upon calling thumbnail path it looks for the path n gives the preview??

then again for asp .net core i see k-listview-item i do not see a k-file-preview but on asp .net mvc and for jQuery I can see the thumbnail on demo -->  https://demos.telerik.com/aspnet-mvc/editor/imagebrowser

Hello good day.

I have a KendoGrid where there are two rows for each record, the first two fields are repeated, I would like to merge two cells and make a single row with them, but the rest of the fields belonging to those records remain in their two different rows.

I show how it looks right now:

I show how I want it to look:

Thank you so much.

Hi, I want to create a shared data source that I can then apply filtering to. This data source should be initialised from a property on the Razor page model.

With a Grid you can do this:

Html.Kendo().Grid(Model.Devices)

But I can't figure out the equivalent for the DataSource. This is not allowed...

Html.Kendo().DataSource<DeviceAggregate>(Model.Devices)
                .Name("devicesDataSource")

We have a custom command in a UI for ASP.NET Core FileManager control that states the icon as a simple textual name which worked fine in 2023.1.117

items.Add("").Type("button").Name("refresh").Icon("reload").Text("Refresh").Click("onRefresh").HtmlAttributes(new { style = "margin-left: 5px;" });

Hi All,
I have a problem. I've a not working grid. I do a compilated query for get the data but the data never gets loaded in the grid.

What is the error? Thanks in advance for any help.

Content of controller 
using DataLayerIAccess.Repository;
using DataLayerIAccess.Repository.Queries;
using Kendo.Mvc.Extensions;
using Kendo.Mvc.UI;
using Microsoft.AspNetCore.Mvc;
using System.Linq;
using System.Threading.Tasks;
using WebViewerIAccess.Models;

namespace WebViewerIAccess.Controllers
{
    public class GridController : Controller
    {
        private readonly IAccessDbContext _context;


        public GridController(IAccessDbContext context)
            => _context = context;


        public async Task<IActionResult> ElencoPresenze_Read([DataSourceRequest] DataSourceRequest request)
        {
            var elencoPresenze = (await _context.GetElencoPresenze(0, 10)).ToList();
            var presenzeViewModel = Utilities.MapFromAType<PresenzeModel>(elencoPresenze);

            var dsResult = presenzeViewModel.ToDataSourceResult(request);
            return Json(dsResult);
        }

Content of .cshtml

@{
    ViewData["Title"] = "Presenze";
}

<div class="text-center">
       @(Html.Kendo().Grid<WebViewerIAccess.Models.PresenzeModel>()
        .Name("grid")
        .Columns(c => {
            c.Bound(p => p.ID);
            c.Bound(p => p.Nome);
            c.Bound(p => p.Cognome);
            c.Bound(p => p.Giorno);
            c.Bound(p => p.Reparto);
        })        .Pageable(p => p
            .PageSizes(new[] { 10, 20, 50 })
            .Refresh(true)
            .Responsive(true))
            .Sortable()
        .Filterable()
        .Scrollable()
        .Groupable()
        .DataSource(ds => ds
            .Ajax()
            .Batch(true)
            .PageSize(20)
            .AutoSync(true)
            .ServerOperation(false)
            .Events(e => e.Error("error_handler"))
            .Model(m => {
                m.Field(p => p.ID);
                m.Field(p => p.Nome);
                m.Field(p => p.Cognome);
            })
            .AutoSync(true)
            .Read(r => r.Action("ElencoPresenze_Read", "Grid"))
</div>

<script type="text/javascript">
    function error_handler(e) {
        if (e.errors) {
            var message = "Errors:\n";
            $.each(e.errors, function (key, value) {
                if ('errors' in value) {
                    $.each(value.errors, function () {
                        message += this + "\n";
                    });
                }
            });
            alert(message);
        }
    }
</script>

Content of Model
using System;

namespace WebViewerIAccess.Models
{
    public class PresenzeModel
    {
        public int ID { get; set; }
        public string Nome { get; set; }
        public string Cognome { get; set; }
        public DateTime Giorno { get; set; }
        public string Reparto { get; set; }
    }
}

thank you

I am relatively new to ASP.Net core (.net6) and I am trying to bind the Kendo scheduler with my existing data source.

Background: I am tasked with replacing outdated javascript tools for our "shipping scheduler", which is very similar to the Telerik Scheduler Timeline view.

Here is an example of what I am trying to achieve...

The data source is a simple API source from the web (for example https://mydomain.com/datasource), with the following structure:

namespace ShippingSchedulerApp.Models
{
    public class SchedulerEvent
    {
        public long ID { get; set; }
        public DateTime? start_date { get; set; }
        public DateTime? end_date { get; set; }
        public string? text { get; set; }
        public string? shipclass { get; set; }
        public decimal? beam { get; set; }
        public string? sectionID { get; set; }
        public string? flag { get; set; }
        public string? country { get; set; }
        public string? visitnumber { get; set; }
        public int? visitid { get; set; }
        public int? imo { get; set; }
        public string? details { get; set; }
        public string? cargo { get; set; }
        public decimal? duration { get; set; }
        public decimal? loa { get; set; }
        public string? stevedore { get; set; }
    }
}

If someone could point me to a demo or a sample way of connecting the above to the Telerik Scheduler Timeline view, that would be great.

Thanks