In Development
Last Updated: 23 May 2022 11:21 by ADMIN

### Bug report

When the DropDownTree control is added as a Form editor through the Editor() method, there is an ArgumentNullException "Value cannot be null. (Parameter 'key')".

### Reproduction of the problem

Attached is a demo that replicates the issue.

If the DropDownTree is defined outside of the Form, it is bound to the Model property as expected.

### Expected/desired behavior

The DropDownTree editor should bind to the Model property in the Form.

### Environment

* **Kendo UI version: 2022.1.412
* **jQuery version: 1.12.4
* **Browser:** [all]

In Development
Last Updated: 20 May 2022 14:51 by ADMIN

Bug report

When the FileManager is defined using TagHelpers the defined schema is not serialized

Reproduction of the problem

The following FileManager definition:

<kendo-filemanager name="filemanager" upload-url="@Url.Action("FileManagerUpload", "FileManager")">
            <read url="@Url.Action("FileManagerRead", "FileManager")" type="POST" />
            <create url="@Url.Action("FileManagerCreate", "FileManager")" type="POST" />
            <destroy url="@Url.Action("FileManagerDestroy", "FileManager")" type="POST" />
            <update url="@Url.Action("FileManagerUpdate", "FileManager")" type="POST" />
            <filemanager-model id="path" has-children="hasDirectories">
                    <field name="path" type="string" from="Path"></field>
                    <field name="name" type="string" from="Name"></field>
                    <field name="extension" type="string" from="Extension"></field>
                    <field name="created" type="date" from="Created"></field>
                    <field name="createdUtc" type="date" from="CreatedUtc"></field>
                    <field name="modified" type="date" from="Modified"></field>
                    <field name="modifiedUtc" type="date" from="ModifiedUtc"></field>
                    <field name="size" type="number" from="Size"></field>
            <item name="createFolder" />
            <item name="upload" />
            <item name="sortDirection" />
            <item name="sortField" />
            <item name="changeView" />
            <item name="spacer" />
            <item name="details" />
            <item name="search" />

generates the following script, without a schema definition:

  kendo.syncReady(function() {
        "uploadUrl": "/FileManager/FileManagerUpload",
        "toolbar": {
            "items": [{
                "name": "createFolder"
            }, {
                "name": "upload"
            }, {
                "name": "sortDirection"
            }, {
                "name": "sortField"
            }, {
                "name": "changeView"
            }, {
                "name": "spacer"
            }, {
                "name": "details"
            }, {
                "name": "search"
        "dataSource": {
            "schema": {
                "model": {
                    "id": "path",
                    "hasChildren": "hasDirectories"
            "transport": {
                "destroy": {
                    "type": "POST",
                    "url": "/FileManager/FileManagerDestroy"
                "read": {
                    "type": "POST",
                    "url": "/FileManager/FileManagerRead"
                "update": {
                    "type": "POST",
                    "url": "/FileManager/FileManagerUpdate"
                "create": {
                    "type": "POST",
                    "url": "/FileManager/FileManagerCreate"

Expected/desired behavior

The FileManager DataSource schema should be serialized


  • Kendo UI version: 2021.2.616
  • Browser: [all]
In Development
Last Updated: 20 May 2022 14:46 by ADMIN

### Bug report

When Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation NuGet package is installed in Telerik UI for ASP.NET Core application, it throws an exception:

FileNotFoundException: Could not load file or assembly 'Microsoft.DotNet.InternalAbstractions, Version=, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.

### Reproduction of the problem

1. Create Telerik UI for ASP.NET Core MVC application (.NET Core version 6.0).

2. Install Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation NuGet package (version 6.0.5).

3. Turn on the Razor Runtime Compilation:

//Program.cs file

// Add services to the container.
                .AddNewtonsoftJson(options => options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver())

4. Run the application and review the exception.

Attached is a runnable sample for reproduction.

### Workaround

Install Microsoft.DotNet.InternalAbstractions NuGet package (version: 1.0.0)

### Environment

* **Kendo UI version: 2022.2.510
* **jQuery version: 1.12.4
* **Browser: [all]

In Development
Last Updated: 08 Jun 2021 08:45 by ADMIN
Created by: William
Comments: 3
Category: Grid
Type: Feature Request

I'm currently evaluating the ASP .Net Core Components and whilst I'm liking it so far, I have to say - the documentation leaves a lot to be desired.

At the moment, I am trying to use grid and looking at documentation, I have no idea if I am meant to be looking in Kendo.Mvc.UI.Fluent or Kendo.Mvc.UI - and when I am there and find an item, there just isn't enough detail. In addition, the demos section appears to actually be more helpful and I'm constantly looking there.

What caused me to write this is that I have simply enabled GridFilterMode.Row on an instance and whilst I like it, I want to change the default from "Is Equal To" to "Contains"... I have been experimenting for the past few hours without any luck and I'm going round in circles on documentation:

I can see that Filterable requires GridFilterMode, but the documentation is lacking -

I then try to find the filterable modes documentation, but, half the features/methods just don't seem to have any affect whatsoever.

Personally, I'm having great luck learning about your components from the demo section and adapting the code to suite my needs - but, if there isn't a demo, it appears to be a very hard task to learn what is and isn't possible.