Questions on UI for Blazor Forum

1 answer

31 views

I'm using the TelerikTooltip (with tooltipposition: top) to wrap an icon on a page, so that when the icon is hovered, the tooltip appears. It appears that when the size of the page is such that the tooltip would overlap with the edge of the page, the tooltip adjusts its location. When it does so, it seems that telerik blazor initially attempts to place the callout (using css left) at the middlepoint of the tooltip, then corrects itself, and places the callout at the correct location above the item it is attached to. This shows visually as the callout appearing in one location, then flickering and appearing in another location. I have tried a few troubleshooting steps, including setting the css of the tooltip callout to left: unset, which worked perfectly on my local version of our application, but did not work once it was pushed to our application environment. In the local, this change made it so that the callout would not be placed in the midpoint initially but would skip that step and be correctly placed above the icon as desired. In the application environment however, it would put the callout at the leftmost point of the tooltip, and then do the same flickering, and then put it in the correct location. This makes me think that the issue could be solved if I could find a way to skip the step where it attempts to put the callout in the midpoint of the tooltip. However, I'm unable to find a way to make it do that.

My question is: is there a known workaround for this issue which I can use, or is this something that can be fixed by telerik? Or are there any suggestions of other things I can try, given that using "left: unset" in css was pretty close to working?

Here is the code used for the icon's razor file.

<TelerikTooltip Class="infoIcon-tooltip" TargetSelector="@($"#{IconId}")" ShowOn="@TooltipShowEvent.Hover" Position="TooltipPosition.Top"></TelerikTooltip>
<span id="@IconId" class="infoIcon" title="@Title"/>

Here is the css used for the tooltip and its callout (which did not quite work correctly):

.infoIcon-tooltip .k-tooltip {
    background: var(--icon-tooltip-grey);
    border: 0.5px solid var(--icon-tooltip-grey);
    border-radius: 4px;
}

.infoIcon-tooltip .k-tooltip-content {
    font-family: Tenorite,sans-serif,Arial;
    font-size: 16px;
    word-wrap: break-word;
    width: -moz-fit-content;
    width: fit-content;
    height: -moz-fit-content;
    height: fit-content;
    color: white;
}


.infoIcon-tooltip .k-tooltip .k-callout {
    color: var(--icon-tooltip-grey);
    left: unset;
}

Tooltip

answered on 01 Sep 2025

1 answer

11 views

Load data when visible

Hi,

I'm using the carousel as a rotating dashboard.

Is it possible to only load the data when the controls become visible, and not all when the page loads.

Thanks

Nick

Carousel

answered on 29 Aug 2025

1 answer

32 views

DockManager&Tabs Issues

Hi Telerik Team,

While working with the DockManager component we encountered a few issues / potential improvements:

1. Inconsistent pane header height
- When pane are in different visual states (headers displayed as a Tab vs. as a PaneHeader), their heights differ.
- Feature request: please consider introducing size enums (e.g. Small / Medium / Large) so that developers can adjust the header size. At the very least, making the heights consistent by default would help.

2. Last tab not transforming back to PaneHeader
- When multiple panes are attached to the same field, they stack as tabs in a TabStrip.
- However, when only one pane remains(after any drag and drop to another field), it still stays inside the TabStrip instead of transforming back to the PaneHeader UI.
- Why is this the case? From a UX perspective, it would be more natural for the last tab to revert to the pane header style.

3. Conflicting CSS classes applied
- When a pane is defined as follows:

<DockManagerContentPane HeaderText="@AppService.CurrentPageTitle"
                             AllowFloat="false"
                             Unpinnable="false"
                             Closeable="false"
                             Dockable="false">

- The content area receives both k-pane-content AND k-tabstrip-content classes.
- This results in broken UI: double scrollbars, extra padding, and layout inconsistencies.

Screenshots attached for reference.
If something is not clear, feel free to ask, I would try to explain better =)

Thanks,
Regards,
Bohdan

DockManager

TabStrip

answered on 29 Aug 2025

2 answers

22 views

Blazor DatePicker open on with a minimum date in the future

Hi,

Is there a way to open a date picker component targeting the month of a future minimum date ?

For example, I have a minimum date in 3 months. When I open the date picker, the popup is focus on today. When I change the month or click on 'Today', the focus goes on the month of this future date as expected.

I would like to have this behavior when opening the popup.

I tried to use the NavigateTo() with the OnOpen() event but no luck.

REPL example : https://blazorrepl.telerik.com/cJYCGmlk51WrceTj48

Thanks in advance

DatePicker

answered on 27 Aug 2025

1 answer

20 views

Custom FilterDescription in dynamic Grid

I have a Grid with dynamic number of column (using ExpandoObject) and I want to create a custom row filter with a single text input field that uses a kind of simple wildcard logic I've already written, like "joh*" and so on. My question is how I call my wildcard method. I've started out with a FilterCellTemplate and TelerikTextBox where I can capture ValueChanged and I have access to the new value and the FilterCellTemplateContext. But how to continue? I've search the website without much success. Is it possible to call my wildcard logic from a custom FilterDescriptor?

Filter

Grid

answered on 26 Aug 2025

1 answer

21 views

AIPrompt clear/remove items from output

Hi Telerik Team,

We are currently prototyping with TelerikAIPrompt.
We want to implement a conversation context feature, so I’m wondering how we can clear the output in order to load new data bound to another conversationId.

I only see an AddOutput method, but there doesn’t seem to be a way to remove or clear existing outputs.

Does this mean I should manually rewrite the OutputItemsTemplate and Views, etc... and manage my own collection instead of relying on the @context available inside the OutputItemTemplate?

I believe many people must have run into this issue, but I haven’t been able to find any related forum posts, knowledge-base articles, or demos.

Thanks!
Bohdan

AIPrompt

answered on 22 Aug 2025

1 answer

18 views

Predefined Dialogue Null reference error

When I call "Dialogs.AlertAsync", I get null reference error. Any reason why? The whole page is under TelerikRootComponent.

<TelerikGrid Data="@availableSchedules" class="myTelerik-grid" SelectionMode="GridSelectionMode.Multiple"
             SelectedItems="@selectedSchedules"
             SelectedItemsChanged="@((IEnumerable<BTWInstructorAvailability> newSelected) => OnRowSelect(newSelected))"
             ScrollMode="GridScrollMode.Scrollable" Height="300px">
    <GridColumns>
        <GridCheckboxColumn CheckBoxOnlySelection="true" SelectAll="false" />
        <GridColumn Field="InstructorName" Title="Instructor Name" />
        <GridColumn Field="StartDate" DisplayFormat="{0:MM/dd/yyyy}" Title="Start Date" />
        <GridColumn Field="EndDate" DisplayFormat="{0:MM/dd/yyyy}" Title="End Date" />
        <GridColumn Field="Languages" Title="Languages" />
    </GridColumns>
</TelerikGrid>

protected async Task OnRowSelect(IEnumerable<BTWInstructorAvailability> newSelected)
{
    // Enforce max selection of 3
    if (newSelected.Count() > 3)
    {
        await Dialogs.AlertAsync("Maximum of 3 lessons can be selected.");
        return; 
    }

    selectedSchedules = newSelected;
}

Dialog

Grid

answered on 21 Aug 2025

1 answer

23 views

CheckBox in GridColumn (template) - how to prevent it from being edited?

I have a grid that is needs to use EditMode=GridEditMode.Incell. I have a Telerik CheckBox defined under Template for a GridColumn. In order to prevent the need to click twice on the checkbox in the grid (click once to enter edit and click again to actually change the state of the checkbox to checked/unchecked), I have to set the GridColumn to Editable=false and then use OnChange to set the model value:

 <TelerikGrid @ref="@BookingEquipmentGridRef"
              Data="@BookingEquipmentList"
              EditMode="@GridEditMode.Incell"
              OnEdit="@OnEquipmentEdit"
              OnRowClick="@OnEquipmentRowClick"
              OnRowRender="@OnRowRenderHandler"
              OnUpdate="@OnEquipmentUpdate"
              OnStateInit="@((GridStateEventArgs<BookingEquipmentModel> args) => OnEquipmentGridStateInit(args))"
              Height="226px"
              Size="@ThemeConstants.Grid.Size.Small"
              SelectionMode="GridSelectionMode.Single"
              SelectedItems="@SelectedEquipmentList"
              FilterMode="GridFilterMode.FilterMenu"
              Resizable="true"
              Sortable="true"
              Reorderable="true"
              Pageable="true"
              EnableLoaderContainer="false"
              PageSize="25">
   <GridColumns>
                <GridColumn Field=@nameof(BookingEquipmentModel.IsChassis) Title="Chassis" Editable="false" Filterable="false" Width="5rem">
                    <Template>
                        @{
                            var bem = (BookingEquipmentModel)context;
                        }
                        <TelerikCheckBox Value="@bem.IsChassis" ValueExpression="@(() => bem.IsChassis)" ValueChanged="@((bool newValue) => OnChassisChanged(newValue, bem))" />
                    </Template>
                </GridColumn>

   </GridColumns>
</TelerikGrid>

Because I have to set Editable=false the OnEdit event is not fired so I no longer can use args.IsCancelled = true to prevent cell update. In my OnChassisChanged I can not assigned the value to the model but the visual state will no longer match.

    private Task OnChassisChanged(bool newValue, object item)
    {
        if (item == null) return Task.CompletedTask;

        BookingEquipmentModel selectedEquipmentModel = (BookingEquipmentModel)item;

        if (EditableState(SelectedBooking, selectedEquipmentModel) == BookingEquipmentState.EditableStatus.No) return Task.CompletedTask;

        selectedEquipmentModel.IsChassis = newValue;
        selectedEquipmentModel.IsEdit = true;
        DataState.State = DataState.States.UnSaved;

        return Task.CompletedTask;
    }

My users were complaining about having to click twice on a checkbox to set it's new state (checked or unchecked) ... and I agree with their issue, but I can't seem to find a solution (and keep using the TelerikCheckBox) ... any suggestions?

I seem to recall reading another thread from some other user having similar problem, but seem unable to locate it again.

Checkbox

Grid

answered on 21 Aug 2025

1 answer

12 views

GridCommandColumn GridCommandButton text for add/edit

How can I change the text for the save command for a row to say add when it's adding a new item and Update when it's updating a new item? Is there no official way and I have to manually do that? Thanks!

Grid

answered on 20 Aug 2025

1 answer

21 views

Status of Conversational UI Component

According to the following link, the Conversational UI component is complete and was released in Aug '25: conversational ui (chat)

However, I don’t see it referenced in the August release notes, documentation, or any related demos. Please, let me know if this component is available and I’ve just overlooked where to find it.

General Discussions

answered on 20 Aug 2025