Would it be possible to have the ability to create compact TreeList's similar to how we can now in a Grid? Since Size=ThemeConstants.Grid.Size.Small is available a Grid now it seems natural this would be a next step. If we can be provided with a work around for the time being that would be great.

The FileManager crashes with a null reference exception when the selected file is deleted while the preview pane is open.

https://demos.telerik.com/blazor-ui/filemanager/overview

Error: System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Object.GetType()
   at Telerik.Blazor.Components.TelerikFileManager`1.ConvertToFileEntry(Object dataItem)
   at Telerik.Blazor.Components.TelerikFileManager`1.GetSelectedEntryForDetails()
   at Telerik.Blazor.Components.TelerikFileManager`1.<BuildRenderTree>b__397_15(RenderTreeBuilder __builder3)
   at Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder.AddContent(Int32 sequence, RenderFragment fragment)
   at Telerik.Blazor.Components.TelerikSplitter.BuildRenderTree(RenderTreeBuilder __builder)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)

The window actions OnClick handler does not execute when a predefined action (e.g. Close) is triggered. This prevents custom logic from running during standard close operations.

Reproducible on version 14.0.0

Repro: https://blazorrepl.telerik.com/wqaJcWbu45qZxbeX49

At the moment start and end times effectively "round" to the nearest half an hour.   This can give the impression of events overlapping when they do not

e.g.

Admin edit: This feature would be similar to the Exact Time Rendering in our WebForms suite: https://demos.telerik.com/aspnet-ajax/scheduler/examples/exacttimerendering/defaultcs.aspx

The DateInput value disappears on focus when it is set with an async operation in OnInitializedAsync and AutoCorrectParts is false. Potentially related to Cannot select new DatePicker value from the Calendar when AutoCorrectParts is false

Test page with a workaround:

https://blazorrepl.telerik.com/cKkUaDbm09LYyPvg11

<p> The DateInput Value is: @DateValue </p>

@if (ShouldRenderDateInput)
{
    <TelerikDateInput @bind-Value="@DateValue"
                    Format="dd/MM/yyyy"
                    AutoCorrectParts="false"
                    Width="200px" />
}
@* the else block is optional to prevent delayed component appearance *@
else
{
    <TelerikDateInput @bind-Value="@DateValue"
                    Format="dd/MM/yyyy"
                    AutoCorrectParts="false"
                    Width="200px" />
}

@code {
    private DateTime? DateValue { get; set; }
    private bool ShouldRenderDateInput { get; set; }

    protected override async Task OnInitializedAsync()
    {
        await Task.Delay(200);
        DateValue = new DateTime(2026, 06, 22);
        ShouldRenderDateInput = true;
    }
}

Bug report

Reproduction of the problem

Possibly related to https://github.com/telerik/blazor/issues/2594

1. Run this example: https://blazorrepl.telerik.com/wAkdbZPo47oCuV5G32
2. Without scrolling the Grid horizontally resize a non-locked column (e.g., In Stock)

Current behavior

(optional)

The first locked column (ID) is rendered after the second locked column (Product Name). When you resize a non-locked column, the ID column disappears and is revealed at its new position after you scroll the Grid horizontally.
The behavior is reproducible with RTL enabled.

Expected/desired behavior

The order of the locked columns should persist.

Environment

• Telerik version: 13.0.0
• Browser: [all]

Hello,

after selecting a block of text in your editor and perform some block operation (for instance - change font size, name, ..) the original selection is lost. Would it be possible to keep that selection please?

Very thanks.

Miroslav

When I have a DatePicker and it's DateOnly value is default, the control displays 1/1/2001 instead of either nothing, a placeholder, or the correct value.

The image above shows the DatePicker value and the current value in the model underneath.

Please advise.

We upgraded to the latest Telerik Blazor components (8.1.1).
I think there's a bug in the TabStrip when setting the index of the ActiveTabIndex or @bind-ActiveTabIndex.
The page will scroll to the active tab automatically.

Here's a link to the Repl - https://blazorrepl.telerik.com/GfaTEmbR45zQSzEq44

If you remove @bind-ActiveTabIndex="@ActiveTabIndex" from the TelerikTabStrip then the page load normally.

Thanks,

Cesar

The DateInput / TimePicker display the current Format instead of the component Value when the current culture / localization is not English (en).

DateTime values show as expected.

If the Height parameter is not specified, in the Gantt tree list, every line after the number of lines of the initial display are not shown.

The steps are easy to reproduce:

Start from the official Gantt Demo in the REPL and simply remove the Height parameter from TelerikGantt.

If you do this, you will see that opening the children of the first and only element in the tree list will show everything correctly in the Timeline part (if no mistake) but doesn't show the children lines in the TreeList part.

The TabStrip ActiveTabIdChanged event fires when the user navigates to another page.

The workaround is to detect app navigation and prevent the business logic execution. The example below is for the general case. If the app navigates programmatically with NavigationManager.NavigateTo(), you can set the IsNavigating flag immediately before that.

@implements IDisposable
@inject NavigationManager NavManager

<TelerikTabStrip ActiveTabId="@ActiveTabId"
                 ActiveTabIdChanged="@TabStripActiveTabIdChanged">
    @for (int i = 1; i <= TabCount; i++)
    {
        int tabIndex = i;

        <TabStripTab @key="@tabIndex" Title="@($"Tab {tabIndex}")" Id="@($"tab{tabIndex}")">
            <h2>Tab @tabIndex</h2>
        </TabStripTab>
    }
</TelerikTabStrip>

@code {
    private string ActiveTabId { get; set; } = "tab1";

    private bool IsNavigating { get; set; }

    private const int TabCount = 3;
    

    private async Task TabStripActiveTabIdChanged(string newActiveTabId)
    {
        if (IsNavigating)
        {
            return;
        }

        ActiveTabId = newActiveTabId;
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            locationChangingRegistration = NavManager.RegisterLocationChangingHandler(OnLocationChanging);
        }
    }

    private IDisposable? locationChangingRegistration;

    private ValueTask OnLocationChanging(LocationChangingContext context)
    {
        IsNavigating = true;

        return ValueTask.CompletedTask;
    }

    public void Dispose() => locationChangingRegistration?.Dispose();
}

This is a continuation of public item DatePicker, TimePicker and DateTimePicker should accept null value as valid when bound to nullable DateTime

The problem persist when:

• The component Format includes a week day.
• The component Format is set with a standard date format string (d, D, g, etc.)

Test page with workarounds:

Bug due to week day format string inconsistency between .NET and JavaScript (dddd vs EEEE):

<TelerikDateTimePicker @bind-Value="@SelectedTime"
                       ShowClearButton="true"
                       Width="360px">
    <DateTimePickerFormatPlaceholder Weekday="week" />
</TelerikDateTimePicker>

<br />
<br />

Bug due to usage of a standard date format string:

<TelerikDatePicker @bind-Value="@SelectedTime"
                   ShowClearButton="true"
                   Format="d"
                   Width="360px">
    <DateTimePickerFormatPlaceholder Day="dd" Month="mm" Year="yyyy" />
</TelerikDatePicker>

@code {
    private DateTime? SelectedTime = DateTime.Now;
}

I've determined that the TelerikDateTimePicker does not work properly on mobile devices when using AdaptiveMode.Auto. Attached are videos of the component's behaviour in both modes (None, and Auto).

Immediately after interacting with the fullscreen popup of the datepicker, I see this error in the console:

RAW:
telerik-blazor.js:50 Uncaught TypeError: r.isParent is not a function
    at p.isChild (telerik-blazor.js:50:1362352)
    at f.closePopup (telerik-blazor.js:50:1398427)
    at HTMLHtmlElement.onMouseDown (telerik-blazor.js:50:1397246)

Code:

@using Telerik.Blazor.Components
@using Telerik.Blazor

<TelerikFloatingLabel Text="Date & Time">
    <TelerikDateTimePicker Id="date-picker" @bind-Value="MyFormModel.Date" Max="@DateTime.Now.AddDays(1)"
                           Format="@DATE_FORMAT" AdaptiveMode="AdaptiveMode.Auto"
                           FillMode="@Telerik.Blazor.ThemeConstants.DateTimePicker.FillMode.Flat" />
</TelerikFloatingLabel>

@code {
    private FormModel MyFormModel { get; set; } = new FormModel();
    private const string DATE_FORMAT = "MM/dd/yyyy HH:mm";

    private class FormModel
    {
        public DateTime Date { get; set; }
    }
}

Notes:
- If we remove all of the parent components wrapping the DatePicker, it seems to function properly, but the errors remain in the console. This isn't a solution, however.