I have been having issues adding the month view to a Telerik Blazor scheduler component, when there is grouping. It gives a null reference error any time I try to switch to the month view. I also tried it using the available demo for grouping in Telerik REPL, the only difference I found between my code and the demo was that I had used the ItemsPerSlot parameter.  I added this to the demo, and was able to reproduce the error I was seeing, and I have attached the console output from the REPL demo. I believe there is either a bug with the ItemsPerSlot being used in conjunction with grouping on a scheduler component, or some instruction missing from how to set it up properly to prevent this null reference issue. 

Changed code:

<SchedulerMonthView ItemsPerSlot="5"></SchedulerMonthView>

Demo used:

Blazor Scheduler (Event Calendar) Demos - Grouping | Telerik UI for Blazor

Description

An input with type="password" should not have a default role. See:
w3c/html-aria#422
https://w3c.github.io/html-aria/#dfn-no-corresponding-role

Steps To Reproduce

Inspect the rendering of the password input in this demo: https://demos.telerik.com/blazor-ui/textbox/password

Actual Behavior

The element renders a role="textbox" attribute.

Expected Behavior

The element does not render a role="textbox" attribute.

Browser

All

Last working version of Telerik UI for Blazor (if regression)

No response

If the GridScrollMode.Virtual is enabled for the Grid, and the NoDataTemplate exceeds the height of the Grid container, a user can infinitely scroll inside the table even when there is no data and the template is displaying.

===ADMIN EDIT===

A possible workaround is to apply "overflow-y: hidden;" when the NoDataTemplate is shown: REPL link.

• The PDF Viewer does not display the initial file if Zoom is set to FitToWidth or FitToPage. This is due to --scale-factor: NaN; --total-scale-factor: NaN; set on the PDF Viewer element.
• If the PDF Viewer initially shows with no loaded file, setting Zoom to FitToWidth or FitToPage initially or after opening a file leads to infinity zoom due to --scale-factor: Infinity; --total-scale-factor: Infinity; set on the PDF Viewer element.

The only scenario that works is to set the initial Zoom to a numeric value and have an open file by default.

I am using a Blazor Telerik Grid and implementing a custom TelerikCheckBoxListFilter inside a FilterMenuTemplate.

When a user opens the "Name" filter menu and types a name quickly into the search/filter box, some of the text is removed automatically.

For example, if I type "1234567890" as input, without any delay - some of the letters will be cleared and it is showing as "1246890" in the filter search box. It could be because it is searching in real time, but the user input I am typing is not carried over correctly. See the attached screenshot taken from Telerik Demo site for the above said example.

Below is the column definition I am currently using:

<GridColumn Field="@nameof(Tenant.TenantName)" Title="Name" Width="*" FilterMenuType="@FilterMenuType.CheckBoxList">
    <FilterMenuTemplate Context="context">
        <TelerikCheckBoxListFilter Data="@Model.DistinctTenantNameList"
                                   Field="@(nameof(FilterTenantName.TenantName))"
                                   @bind-FilterDescriptor="@context.FilterDescriptor">
        </TelerikCheckBoxListFilter>
    </FilterMenuTemplate>
</GridColumn>

The TreeView OnItemContextMenu event should fire only for the clicked item, but it fires for its parents too. The issue started occurring in version 13.0.0.

Test page

https://www.telerik.com/blazor-ui/documentation/components/treeview/events#example

Hallo,

i want to Render PDF Files with the PDF Viewer Component.

The Data of the PDF is already fetched from the API when the PDF-Viewer starts Rendering the Loading animation appears and freezes.

After a few Seconds the PDF will be Rendered.

The size of the PDF File is about 5MB.

=====

TELERIK EDIT: Here is a possible workaround - replace the built-in PDF Viewer LoaderContainer with another one with a different animation Type.

<div class="pdfviewer-wrapper">
    <TelerikPdfViewer Height="600px" />

    @* With a Loading... label *@
    <TelerikLoaderContainer Class="pdf-loader-container"
                            OverlayThemeColor="@ThemeConstants.Loader.ThemeColor.Light"
                            Size="@ThemeConstants.Loader.Size.Large"
                            Visible="true" />

    @* Without a Loading... label *@
    @*<TelerikLoaderContainer Class="pdf-loader-container"
                                OverlayThemeColor="@ThemeConstants.Loader.ThemeColor.Light"
                                Visible="true">
            <Template>
                <TelerikLoader Size="@ThemeConstants.Loader.Size.Large"
                               Type="@LoaderType.Pulsing" />
            </Template>
        </TelerikLoaderContainer>*@
</div>

<style>
    .pdfviewer-wrapper {
        position: relative;
    }

    .pdf-loader-container,
    .k-pdf-viewer .k-loader-container {
        visibility: hidden;
    }

    .k-pdf-viewer:has(.k-loader-container:not([style*="none"])) + .pdf-loader-container {
        visibility: visible;
    }
</style>

@code {
    private byte[]? PdfViewerData { get; set; }
}

If the Start and End match exactly, the rendering of the Scheduler breaks in Day view. If another view is used, the event looks as if it is rendered on the previous day.

===

ADMIN EDIT

===

A possible workaround for the time being is to use a custom edit form and implement some kind of validation that prevents the user from selecting the same value for the Start and End of an event.

Steps to reproduce
Reproducible with UI for Blazor, as well as UI for ASP.NET Core (PDF.js and DPL processing)

1. Open the attached file in the PDFViewer.

Actual Behavior
The content is visualized distorted, large parts of it are missing, layout is messed up.

Expected Behavior
The document content is visualized properly, as it is with: https://mozilla.github.io/pdf.js/web/viewer.html

Bug report

Reproduction of the problem

(bug report only)
Steps to reproduce:

1. Place a TelerikChart with OnSeriesClick inside a TileLayoutItem

<h4>TileLayout:</h4>

<TelerikTileLayout Columns="1" RowHeight="340px">
    <TileLayoutItems>

        <TileLayoutItem ColSpan="1" RowSpan="1">
            <HeaderTemplate>
                <span>With fix (.k-tilelayout-item.k-card) - header stays stable on click</span>
            </HeaderTemplate>
            <Content>
                <p>Last clicked: <strong>@_lastClicked</strong></p>
                <TelerikChart Width="100%" OnSeriesClick="@OnSeriesClick">
                    <ChartSeriesItems>
                        <ChartSeries Type="ChartSeriesType.Donut"
                                     Data="@_chartData"
                                     Field="@nameof(SliceData.Value)"
                                     CategoryField="@nameof(SliceData.Label)"
                                     ColorField="@nameof(SliceData.Color)">
                        </ChartSeries>
                    </ChartSeriesItems>
                    <ChartLegend Position="ChartLegendPosition.Bottom"></ChartLegend>
                </TelerikChart>
            </Content>
        </TileLayoutItem>

    </TileLayoutItems>
</TelerikTileLayout>

@code {
    private string _lastClicked = "none";

    private List<SliceData> _chartData = new()
    {
        new SliceData { Label = "Confirmed", Value = 42, Color = "#4CAF50" },
        new SliceData { Label = "Pending",   Value = 28, Color = "#FF9800" },
        new SliceData { Label = "Inactive",  Value = 30, Color = "#F44336" }
    };

    private void OnSeriesClick(ChartSeriesClickEventArgs args)
    {
        _lastClicked = args.Category?.ToString() ?? "unknown";
    }

    private class SliceData
    {
        public string Label { get; set; } = "";
        public double Value { get; set; }
        public string Color { get; set; } = "";
    }
}

1. Click any chart series

Current behavior

(optional)
Tile header collapses and disappears.
Root cause: The theme applies overflow: hidden to .k-card, which is the tile's root flex container. When a Chart series is clicked, the Chart briefly inflates the body height, causing the flex layout to squeeze the header to height 0. The overflow: hidden on the root then clips the zero-height header out of view entirely.

Expected/desired behavior

Tile header remains visible

Workaround:

<style>
    .k-tilelayout-item.k-card {
        overflow: scroll;
    }
</style>

Environment

• Kendo/Telerik version:
• Browser: [all ]

The MaskedTextBox caret (cursor) jumps to the last position on focus and every key stroke when the component is inside a Grid EditorTemplate and the Grid EditMode is InCell.

A possible workaround is to use inline or popup editing.

Test Page:

<TelerikGrid Data="@GridData"
             EditMode="@GridEditMode.Incell"
             OnUpdate="@OnGridUpdate"
             OnCreate="@OnGridCreate">
    <GridToolBarTemplate>
        <GridCommandButton Command="Add">Add Item</GridCommandButton>
    </GridToolBarTemplate>
    <GridColumns>
        <GridColumn Field="@nameof(Product.Name)" />
        <GridColumn Field="@nameof(Product.MaskedValue)">
            <EditorTemplate>
                @{ var dataItem = (Product)context; }
                <TelerikMaskedTextBox @bind-Value="@dataItem.MaskedValue"
                                      Mask="AAA-AAA" />
            </EditorTemplate>
        </GridColumn>
    </GridColumns>
</TelerikGrid>

@code {
    private List<Product> GridData { get; set; } = new();

    private int LastId { get; set; }

    private void OnGridCreate(GridCommandEventArgs args)
    {
        var createdItem = (Product)args.Item;

        createdItem.Id = ++LastId;

        GridData.Insert(0, createdItem);
    }

    private void OnGridUpdate(GridCommandEventArgs args)
    {
        var updatedItem = (Product)args.Item;
        var originalItemIndex = GridData.FindIndex(i => i.Id == updatedItem.Id);

        if (originalItemIndex != -1)
        {
            GridData[originalItemIndex] = updatedItem;
        }
    }

    protected override void OnInitialized()
    {
        for (int i = 1; i <= 5; i++)
        {
            GridData.Add(new Product()
            {
                Id = ++LastId,
                Name = $"Product {LastId}",
                MaskedValue = $"ABC-{LastId:D3}"
            });
        }
    }

    public class Product
    {
        public int Id { get; set; }
        public string Name { get; set; } = string.Empty;
        public string MaskedValue { get; set; } = string.Empty;
    }
}

The Popup OnHide event does not fire if the app has previously closed the Popup instance programmatically with the Hide() method.

The issue can be reproduced in this documentation example.

Bug report

Reproduction of the problem

(bug report only)

1. Run this example: https://blazorrepl.telerik.com/mUOqQflm56D4xScx54
2. Select a font in the FontFamily dropdown.
3. Click the UnorderedList tool in the Editor’s toolbar.
4. A bullet is added and the FontFamily tool loses its value.
5. Click right after the added bullet.
6. Once again select a font in the FontFamily drodown.
7. Click the UnorderedList tool in the Editor’s toolbar to remove the bullet.
8. The FontFamily tool loses its value.

Current behavior

(optional)
Provide additional information if the steps for reproducing the faulty behavior are not sufficient to describe the issue.

Expected/desired behavior

The FontFamily tool should keep its value when an unordered list is added/removed.

Environment

• Kendo/Telerik version: 14.0.0
• Browser: [all]

Bug report

Reproduction of the problem

(bug report only)
1. Run this example: https://blazorrepl.telerik.com/cUaBGOOZ34pkp6wB57
2. Inspect the MultiSelect’s input.
3. Click within the component’s input area, to open its popup.

The issue is also reproducible in the other dropdown components: https://blazorrepl.telerik.com/GUurGmvw32oPqGYu03

Current behavior

(optional)
When the dropdown opens, an aria-controls attribute is applied to the MultiSelect’s input. Its value does not match any existing DOM element.

Expected/desired behavior

The value of the aria-controls attribute should point at an existing element (e.g., the popup’s list element: https://www.telerik.com/blazor-ui/documentation/components/multiselect/accessibility/wai-aria-support#multiselect-wrapping-element ). But in this case the MultiSelect is not bound to data and a list element is not rendered in the popup.

Environment

• Kendo/Telerik version: 14.1.0
• jQuery version:
• Browser: [all ]

The AutoComplete component does not update the category grouping header, even when the data within that group has been removed. As a result, the outdated group header remains visible until you scroll down to another group, at which point the first group header refreshes and disappears as expected.

Repro: REPL link.

Hi Support,

I have an issue with the DragToSelect feature of a Telerik grid in Blazor when this grid is inside a TelerikWindow. 

Summary
When a TelerikGrid configured with GridSelectionSettings DragToSelect="true" is rendered inside the <WindowContent> of a <TelerikWindow>, the drag-to-select (rubber-band) behavior is not working properly — the user can only select cells/rows via individual clicks.

Single-click selection continues to work in both cases. The issue is specific to the drag gesture.

Steps to reproduce
Create a page with a TelerikWindow set to Visible="true".
Inside <WindowContent>, place a TelerikGrid with:
SelectionMode="@GridSelectionMode.Multiple"
SelectedCells / SelectedCellsChanged bound
<GridSettings><GridSelectionSettings SelectionType="@GridSelectionType.Cell" DragToSelect="true" /></GridSettings>
Open the window and try to select multiple cells by pressing the mouse button on a cell and dragging over neighboring cells.

Expected behavior
A rubber-band selection rectangle appears and all cells the pointer passes over become selected — same as when the identical grid is placed on a regular page (outside a modal window).

Actual behavior
Drag selection occur rarely. Only the single cell under the initial mousedown gets selected. The rubber-band rectangle rarely appears, and SelectedCellsChanged fires with a single descriptor instead of the full drag range.

Minimal repro (REPL-ready)
<TelerikWindow Visible="true" Width="800px" Height="500px">
    <WindowTitle>Repro</WindowTitle>
    <WindowContent>
        <TelerikGrid Data="@Data" TItem="SampleItem"
                     SelectionMode="@GridSelectionMode.Multiple"
                     SelectedCells="@SelectedCells"
                     SelectedCellsChanged="@((IEnumerable<GridSelectedCellDescriptor> c) => SelectedCells = c)">
            <GridSettings>
                <GridSelectionSettings SelectionType="@GridSelectionType.Cell" DragToSelect="true" />
            </GridSettings>
            <GridColumns>
                <GridColumn Field="@nameof(SampleItem.Id)" />
                <GridColumn Field="@nameof(SampleItem.Name)" />
            </GridColumns>
        </TelerikGrid>
    </WindowContent>
</TelerikWindow>

@code {
    public record SampleItem(int Id, string Name);
    private List<SampleItem> Data = Enumerable.Range(1, 20).Select(i => new SampleItem(i, $"Item {i}")).ToList();
    private IEnumerable<GridSelectedCellDescriptor> SelectedCells = Enumerable.Empty<GridSelectedCellDescriptor>();
}

Now my questions :
- Is this a known limitation of DragToSelect when the grid is inside a modal TelerikWindow?
- Is there an officially supported workaround (CSS pointer-events tweak on .k-overlay, event capture override, grid setting, etc.)?
- If it is a bug, could you open a public issue we can track?

Many thanks you in advance.

Franck Boisdé

Description

Appointment editing does not work on Chrome for mobile (Android).

Steps To Reproduce

Run the following demo in the Chrome for mobile browser, on a mobile device with Android : https://demos.telerik.com/blazor-ui/scheduler/appointment-editing

1. Attempt to edit an appointment by double tapping it

Actual Behavior

The popup editor does not show up.

Expected Behavior

The popup editor shows up.

Browser

Chrome

Last working version of Telerik UI for Blazor (if regression)

No response