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>

I'm trying to use the Blazor editor but the "Insert Image" function is very basic. Previously using Webforms & Core the insert image in the editor presented the user with a file management and image upload popup. Is this functionality available with the Blazor component?

=====ADMIN EDIT=====

Possible alternative:

1. Utilize a custom Editor's tool that opens a Window or Dialog containing a FileManager.
2. Use the FileManager's SelectedItemsChanged event to determine which image the user wants to insert into the Editor.
3. Programmatically execute the Editor's insertImage command.

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

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 ]

UI for Blazor version 5.0 improved the FileSelect Stream performance by removing legacy code that meant to support older .NET versions.

However, the Stream performance is still worse and the component works slower, compared to the standard Blazor InputFile.

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;
    }
}

Hello,

I noticed that all component of ComboBox (DropDownList, DropDownTree, MultiColumnComboBox) which have a GroupField doesn't provide a GroupTemplate

It would be very helpful to have one to further customize how we want the group to render

For example in my case, I want to customize items and groups to add checkbox on each level and parent checkbox will select/unselect children, but because I don't have access to group template I can't do it.

I think I can work something with the DropDownTree, but it will be kind of ugly as the component is not suited for multi selection and will not be related to the component selections

Thanks
Regards
Thomas

Support multiple users editing the same content in an editor.

This would be similar to the editor in something like confluence or online Word.

Regards

The ability to choose which options to appear in the ContextMenu.

=====

TELERIK EDIT: In the meantime, here is how to hide context menu items with CSS:

    /* Hide the Rename item in the FileManager context menu */
    .k-context-menu:has(.k-svg-i-download) .k-menu-item:nth-of-type(1) {
        display: none;
    }

    /* Hide the Delete item in the FileManager context menu */
    .k-context-menu:has(.k-svg-i-download) .k-menu-item:nth-of-type(3) {
        display: none;
    }

Here is a complete example: https://blazorrepl.telerik.com/cpPkuBEq408A36p010

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]

Hi,

I would like checkbox support including the check all checkbox on the multiselect component like: https://docs.telerik.com/devtools/aspnet-ajax/controls/combobox/functionality/checkbox-support

The url below shows how to create custom checkboxes in the multiselect component but adding a check all checkbox in the headertemplate does not update the multiselect popup

https://docs.telerik.com/blazor-ui/knowledge-base/multiselect-checkbox-in-dropdown?_ga=2.50111909.206897922.1631541466-694624900.1630583797&_gac=1.246637872.1631604077.EAIaIQobChMI8PnX6Pb98gIVkwCLCh381AjMEAAYASAAEgLROPD_BwE

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 ]

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