I am migrating things from the "forms" world to more and more Core based projects.  I keep hitting an a wall which seems to boil down to missing documentation.  Can someone point me in the correct direction?

My needs start with the basic need to configure the layout of a given form for the user upon initial display.  They will make various selections and press the infamous "update" button when done.  In the broadest sense of things I need to do something like:

That looks simple.  I have figured out how to get the Id of the panel control and have a valid object.  For the life of me I cannot find anything that documents how to find/use the items object.  I know it exists but how of find the item at index "x" seems beyond me.  Based upon the documentation I have found it seems I must find a reference to the item at index "x", then set its expanded property to true/false.  Since I cannot find the index, I am up a creek without the paddle.

I would appreciate any pointers someone can send my way.

On the positive side:  My conversion activities have shown me the power of the telerik core tools.  My initial thoughts has some misgivings however experience has shown they are surprisingly powerful.  I am amazed with the amount of code being replaced by what is now standard functionality.  Working with a framework, as opposed to against it, is a simple but important concept to learn.  Kudos to the Telerik/Progress team.

Hello,

I have a signalr bound grid. The grid has custom popup editor with Tabstrip. First tab - upload picture, or show picture based on ImageUrl field of currently edited record.

So, I'm trying to access:

 - @Model.ImageUrl  - it throws null exception and breaks the page overall, or

- @Html.ValueFor(model=>model.ImageUrl) - it is always null, but I'm sure there are values in database

I have tried the same, just to test it, with for example Firstname field from the same model - the same result

@Html.LabelFor(model=>model.ImageUrl) and @Html.EditorFor(model=>model.ImageUrl) work fine, I can see the label and the correct value inside a textbox.

<div class="row">
            <div>
                @Html.ValueFor(model => model.Firstname) @*this is always null, but I need a value*@
            </div>
            <div>
              @* @Model.Firstname  this breaks whole page with null exception*@
            </div>
            <div>
                @Html.EditorFor(model => model.Firstname) @*this works correctly*@
            </div>
        </div>

/////////// below is the code, why I need the value

<div id="pictures" class="picture dropZoneElement">
                @if (Html.ValueFor(model => model.ImageUrl) != null)
                {
                    <div class="k-edit-label">
                        <img src="Files/Images/" + @Html.ValueFor(model => model.ImageUrl) />
                    </div>
                }
                else
                {
                    <div class="textWrapper">
                        <p><span>+</span>Add Image</p>
                        <p class="dropImageHereText">Drop image here to upload</p>
                    </div>
                }
            </div>

Kind regards

DC

I noticed in one of my forms that suddenly a validation message appears for a dropdownlist. The message could not be found in kendo.messages.xx-XX.js nor was it a validation message from ASP.NET Core (I use my own, localized form of "Required" etc.attribute messages). I found the message inside the file "Exceptions.resx" in the source of Kendo MVC:

How can I translate this into another language?

Regards
Heiko

Hello,

I am experiencing a problem applying culture to the validation messages in my editable grid. I experience the exact same problem as in the following demo:  https://demos.telerik.com/aspnet-core/grid/globalization?culture=fr-FR

As a user I would expect the validation message to be localized but they don't seem to be.

To reproduce,

1. Set the culture to anything other then english,
2. Edit a row,
3. Empty the "Name" column,
4. click out of the textbox to activate validation and notice that the validation message displayed is in english.

Any help on this will be greatly appreciated!

Thank you

I create a disabled DropDownList with the following code:

Based on another DropDownList I change the value of this list:

The change is reflected on the UI, but not on the underlying Model which still has the old value. As soon as I enable the DropDownList everything works fine. What I expect is that the value gets changed no matter if the dropdown is enabled or disabled.

Regards
Heiko

Hi,

i am using ASP.NET Core with a KENDO Grid which calls a Razor Page handler.

For performance reasons, the Grid is pageable, filterable and sortable.

Now we want the DataSourceRequest on the server to directly filter the MongoDB query. I am using "AsQueryable()" on the IMongoCollection, which i thought works nicely with the KENDO DataSourceResult method. 

But the speed of the MongoDB query is always slow. It does not matter if i filter the grid for just one result or if i display all results (paged).

Is this the correct way to use KENDO Grid with MongoDB "database-filtering"?

I am using the following code:

Client

Server

Hello,

I use a template column to have a Kendo style Checkbox in my grid but this is not bind to the underlying boolean value...
with a "normal" Checkbox this is possible with JavaScript but the tsyled Checkbox uses a Label for Styling... (see Picture)

how to do this with the styled checkboxes?

Hello,

Can someone please help.

I'm trying to do a simple Inline edit grid which has a datetime field but when clicking update the datetime field which is passed through to the controller has null.  It's actually replicated in the example which Progress supply.  

How do I get a valid date through to the controller? surely this is quite a big issue?  is it a locale problem?

.chtml

}

<div class="row">
<div class="col-xs-18 col-md-12">
@(Html.Kendo().Grid<Sample.Models.OrderViewModel>()
.Name("grid")
.Columns(columns =>
{
columns.Bound(p => p.Freight);
columns.Bound(p => p.OrderDate);
columns.Bound(p => p.ShipName);
columns.Bound(p => p.ShipCity);
                    columns.Command(command => { command.Edit(); command.Destroy(); }).Width(160);
})
.Pageable()
.Sortable()
                 .Editable(editable => editable.Mode(GridEditMode.InLine))
.Scrollable()
.Filterable()
.HtmlAttributes(new { style = "height:550px;" })
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
                    .Batch(true)

                    .Model(model => model.Id(p => p.OrderID))
.Read(read => read.Action("Orders_Read", "Grid"))
.Update(update => update.Action("Orders_Update", "Grid"))
)
)
</div>
</div>

GridController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Kendo.Mvc.UI;
using Sample.Models;
using Kendo.Mvc.Extensions;

namespace Sample.Controllers
{
    public class GridController : Controller
    {
        public ActionResult Orders_Read([DataSourceRequest]DataSourceRequest request)
        {
            var result = Enumerable.Range(1, 50).Select(i => new OrderViewModel
            {
                OrderID = i,
                Freight = i * 10,
                OrderDate = new DateTime(2016, 9, 15).AddDays(i % 7),
                ShipName = "ShipName " + i,
                ShipCity = "ShipCity " + i
            });

            var dsResult = result.ToDataSourceResult(request);
            return Json(dsResult);
        }
        [AcceptVerbs("Post")]
        public ActionResult Orders_Update([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<OrderViewModel> products)
        {

     //products.OrderDate is null even though I've selected a date on the edit datepicker.
            return Json(products.ToDataSourceResult(request));
        }

    }
}

I saw that there was a demo for initial files in mvc but that disappeared in the asp.net core demos.

Thanks