Hello,

I am working with application where I have thousands of images to load on ImageBrowser of Kendo Editor.

ImageBrowser is getting stuck as having too many images to load, Can we have any option to add pagination or lazy loading in ImageBrowser?

So, I can load only 20 images at a time and other based on request.

Thanks,

Trusha

https://docs.telerik.com/aspnet-core/html-helpers/editors/dropdownlist/binding/razor-page

My license doesn't include support so this is the only way I could reach out to you. On this page, the line

.Read(r ==> r

should have => instead of ==>. When I pasted this into visual studio, it was giving me completely unrelated error and took me a bit to figure out what was wrong. Please fix the typo.

This is a strange bug I came across when making a simple grid for a small personal project. I created a class called Book, which looks like this:

[Table("Books")]
    public class Book
    {
        [Key]
        public int Id { get; set; }
        [Required]
        public string Title { get; set; } = null!;

        public Checkout? Checkout { get; set; }

        [NotMapped]
        public bool CheckedOut => Checkout != null;
    }

I then created a simple Razor view on which to show the books on a grid. Here is what the code for the page looks like:

@{
    ViewData["Title"] = "All Books";
}

@(
    Html.Kendo().Grid<LibraryMvc.Core.Entities.Book>()
        .Name("bookGrid")
        .Pageable(p => {
            p.PageSizes(new[] {20, 50, 100 });
            p.Numeric(true);
            p.Input(true);
        })
        .Editable(e => e.Mode(GridEditMode.InLine))
        .Filterable()
        .Sortable()
        .Scrollable()
        .ToolBar(t => t.Create())
        .Columns(col => {
            col.Bound(c => c.Id).Title("ID");
            col.Bound(c => c.Title).Title("Title");
            col.Bound(c => c.CheckedOut).Title("Checked Out");
            col.Command(com => {
                com.Edit();
                com.Destroy();
            }).Title("Manage");
        })
        .DataSource(ds => 
            ds.Ajax()
            .PageSize(20)
            .Model(md => {
                md.Id(f => f.Id);
                md.Field(f => f.Id).Editable(false);
                md.Field(f => f.CheckedOut).Editable(false);
            })
            .Read(r => r.Action("Book_Read", "Book"))
            .Create(c => c.Action("Book_Create", "Book"))
            .Update(c => c.Action("Book_Update", "Book"))
            .Destroy(c => c.Action("Book_Destroy", "Book"))
        )
)

When running my app with this code, I noticed that client-side validation would not work on the grid. Nothing would stop me from adding multiple Book rows with empty Titles, despite Title being a [Required] property based on my Book class's Data Annotations:

I assumed I did something wrong, so I scoured the internet and Telerik's support items in hopes of finding something, but then I came across this when inspecting the page's elements in Chrome's dev tools:

Look at the script tag. For whatever reason, the kendoTextBox ended up using the Razor view's ViewData["Title"] property. Oops!

To work around this, I ended up changing my Book class's Title field to BookTitle, as shown below:

[Table("Books")]
    public class Book
    {
        [Key]
        public int Id { get; set; }
        [Required]
        [Column("Title")]
        public string BookTitle { get; set; } = null!;

        public Checkout? Checkout { get; set; }

        [NotMapped]
        public bool CheckedOut => Checkout != null;
    }

With this property name changed, I was able to get client-side validation to work as needed:

A second workaround involved getting rid of the ViewData["Title"] definition on my Razor view:

Given all this, it looks like something that's generating the client-side validation on the page is getting tripped up over the word "Title" being used by multiple items on the page.

### 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=1.0.0.0, 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.
builder.Services.AddControllersWithViews()
                .AddNewtonsoftJson(options => options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver())
                .AddRazorRuntimeCompilation();

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]

It would be useful to have a grid operator for "IN" conditions. Right now we only have 2 options for an OR without having to use a custom filtering and custom clearing functions.

We have a lot of data that needs to be filtered that is not sequential.  For example purposes:

Given that a customer has a standing purchase order for parts over time.

Given that serial numbers on said parts will not be sequential and may not be even be similar enough for wildcards (if that feature is provided.)

Given that we need to filter grid data to retrieve customer number, purchase order and a set of serial numbers, we need the equivalent of:

SELECT * FROM testdatatable WHERE customer = '#####' AND purchaseorder = '#####' AND serialnumber IN ('abciqwe', 'cid235', 'sn34087', 'hpk2679');

which would be WHERE WHERE customer = '#####' AND purchaseorder = '#####' AND (serialnumber  = 'abciqwe' OR serialnumber =  'cid235' OR serialnumber = 'sn34087' OR serialnumber 'hpk2679');

So basically I would like to have the ability to have multiple OR statements and the operand could be 'contains' or 'not contains' as that would probably work better than "equal".

Our immediate need is for the MaskedTextBox.

And have modified my program.cs to add:

// Add services to the container.

builder.Services.AddControllersWithViews()

                // Maintain property names during serialization. See:

                // https://github.com/aspnet/Announcements/issues/194

                .AddNewtonsoftJson(options => options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver());

// Add Kendo UI services to the services container"

builder.Services.AddKendo();

I copied the code from your demo into the ASP.net 6.0 Page above.

I added data properties to the Index.cshtml.cs model and changed the Value property on each Kendo object to point them. That works fine

The issue is that the formatting is not applied:

I know you can query the client side JavaScript version using 

kendo.version

It would be handy if you could query the dll assembly version or cdn url so the URLs can automatically match the dll used in the solution especially when nuget is used to update it currently I work around this using:

    @{  var version = typeof(Kendo.Mvc.KendoServices).Assembly.GetName().Version;
        string kendoCDN = $"//kendo.cdn.telerik.com/{version.Major}.{version.Minor}.{version.Build}";}
    <link href="@Url.Content(kendoCDN + "/styles/kendo.bootstrap-v4.min.css")" rel="stylesheet" type="text/css" />

Bug report

When using th-TH culture and setting a valid name for a component an exception InvalidOperationException: Name cannot contain spaces. is thrown.

Reproduction of the problem

Sample Application

1. Run the attached application
2. Select th-TH from the DropDownList, to change the culture

Current behavior

An InvalidOperationException: Name cannot contain spaces. is thrown.

Expected/desired behavior

Exception should not be thrown and components should be rendered as expected.

Environment

• Kendo UI version: 2022.1.119
• Browser: [all]

Hi,

Will the TagCloud control from the ASP.NET AJAX package ever be ported to the ASP.NET Core package?

I use this on faculty profiles and it is a required component if I ever want to move them to Core.

Thanks,

Charlotte McClellan

There is a new CheckBoxTagHelper to support the new rendering, but the public ModelExpression For { get; set; } property is missing.

Steps to reproduce

1. Execute the code below
2. Enter some values in the Html and Kendo inputs
3. Hit the browser's back button
4. Hit the browser's forward button to redisplay the page

Current Behavior

The value in the Html Input is restored but not the value of the Kendo Input. The same behavior applies for Kendo NumericTextBox, etc.

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2021.3.1207/styles/kendo.bootstrap-v4.min.css" />
    <script src="https://kendo.cdn.telerik.com/2021.3.1207/js/jquery.min.js"></script>
    <script src="https://kendo.cdn.telerik.com/2021.3.1207/js/kendo.all.min.js"></script>
    <script src="https://kendo.cdn.telerik.com/2021.3.1207/js/kendo.aspnetmvc.min.js"></script>
  </head>
  <body>
    <form>
 
      <div>
        <label for="HtmlInput">Html Input</label>
        <input type="text" id="HtmlInput" name="HtmlInput">
      </div>
 
      <div>
        <label for="KendoInput">Kendo Input</label>
        @(Html.Kendo().TextBox ().Name ("KendoInput"))
      </div>
 
    </form>
  </body>
</html>

If you use "Edit in REPL" button in any demo that uses `kendoConsole.log()`, it will throw an error that the kendoConsole doesn't exist (you can use the Upload > Events demo as a quick example).

This is happening because the kendoConsole is only a part of demos.telerik.com pages that does not get copied over to the REPL or Dojo because it is irrelevant to the demo itself. The fix is to change all kendoConsole.log() instances to console.log()

That said, I am opening this bug report so that the dev team can consider ways to handle the "edit in" scenarios.

Thank you,

Arthur

### Bug report

The localization script "kendo.messages.en-GB.min.js" throws a type error in the browser console - "Cannot read properties of undefined (reading 'messages')".

### Reproduction of the problem

1. Include the culture script "kendo.culture.en-GB.min.js" on the page (locally or by using the Kendo CDN service).

2. Include the localization script "kendo.messages.en-GB.min.js" (locally or by using the Kendo CDN service).

3. Set the culture to "en-GB".

4. An error is logged in the browser console: "Cannot read properties of undefined (reading 'messages')".

A Dojo sample for reproduction: https://dojo.telerik.com/aJokESEP

### Environment

* **Kendo UI version: 2021.3.1109
* **jQuery version: 1.12.4
* **Browser:** [all]

### Bug report

The Button TagHelper is missing in the Visual Studio 2022 IntelliSense. 

### Reproduction of the problem

Create a Telerik UI for ASP.NET Core application (.NET 6) and try to insert a Button TagHelper by using the IntelliSense. It appears that not all available Telerik UI components are available in the suggested list.

### Environment

* **Visual Studio Professional 2022 version: 17.1.0 Preview 1.1

* **Kendo UI version: 2021.3.1109
* **jQuery version: 1.12.4
* **Browser: [all]

• ArgumentOutOfRangeException: Index and length must refer to a location within the string. (Parameter 'length')

  • string.Substring(int startIndex, int length)

  • Kendo.Mvc.Rendering.KendoHtmlGenerator.SanitizeId(string id)

  • Kendo.Mvc.UI.WidgetBase.get_Id()

  • Kendo.Mvc.UI.WidgetBase.RenderTrialMessage(TextWriter writer)

  • Kendo.Mvc.UI.WidgetBase.RenderHtml(TextWriter writer)

  • Kendo.Mvc.UI.WidgetBase.ToHtmlString()

  • Kendo.Mvc.UI.Fluent.WidgetBuilderBase<TViewComponent, TBuilder>.ToHtmlString()

  • Kendo.Mvc.UI.Fluent.WidgetBuilderBase<TViewComponent, TBuilder>.WriteTo(TextWriter writer, HtmlEncoder encoder)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.Buffers.ViewBuffer.WriteToAsync(TextWriter writer, HtmlEncoder encoder)

  • Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderLayoutAsync(ViewContext context, ViewBufferTextWriter bodyWriter)

  • Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderLayoutAsync(ViewContext context, ViewBufferTextWriter bodyWriter)

  • Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, string contentType, Nullable<int> statusCode)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, string contentType, Nullable<int> statusCode)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ActionContext actionContext, IView view, ViewDataDictionary viewData, ITempDataDictionary tempData, string contentType, Nullable<int> statusCode)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)

  • Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultAsync>g__Logged|22_0(ResourceInvoker invoker, IActionResult result)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|30_0<TFilter, TFilterAsync>(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext<TFilter, TFilterAsync>(ref State next, ref Scope scope, ref object state, ref bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultFilters>g__Awaited|28_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)

  • Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)

  • Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)

  • Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)

  • Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

If I manually enter the date in the cell the model binder parses the date as it was not an UTC and since my time zone is +2h it comes in the controller as 25.12.2021 22:00

(see the attached files)

Inside my startup.cs I have defined JsonOptions like this:

.AddNewtonsoftJson(options =>
                {
                    options.SerializerSettings.ContractResolver = new DefaultContractResolver();
                    options.SerializerSettings.DateTimeZoneHandling = DateTimeZoneHandling.Utc;
                });

In the Configure method:

var supportedCultures = new[] { new CultureInfo("bg-BG") };

app.UseRequestLocalization(new RequestLocalizationOptions
{
         DefaultRequestCulture = new RequestCulture("bg-BG"),
         SupportedCultures = supportedCultures,
         SupportedUICultures = supportedCultures
});

<script src="~/lib/kendo/js/cultures/kendo.culture.bg-BG.min.js"></script>

<script>
        kendo.culture("bg-BG");
</script>