Description

Affected components: those inheriting from TelerikInputBase (e.g., TelerikDatePicker). When an exception is thrown inside an async Task event handler for the OnChange, OnBlur, OnOpen, and ValueChanged events, the exception is completely and silently swallowed. The exception is not caught by ErrorBoundary.

Related: #6333, #12364

Steps To Reproduce

1. Use a standard ErrorBoundary in MainLayout.razor.

<ErrorBoundary>
    <ChildContent>
        @Body
    </ChildContent>
    <ErrorContent>
        <p class="error">An unhandled error has occurred.</p>
    </ErrorContent>
</ErrorBoundary>

2. Declare a TelerikDatePicker and bind an async Task method to the ValueChanged or OnChange event.

<TelerikDatePicker Value="@DatePickerValue"
                   ValueChanged="@((DateTime inputDate) => OnDatePickerValueChanged(inputDate))">
</TelerikDatePicker>


<TelerikButton OnClick="@(() => throw new Exception("Exception from button"))">Click to test ErrorBoundary</TelerikButton>

@code {
    private DateTime DatePickerValue { get; set; } = DateTime.Today;

    private async Task OnDatePickerValueChanged(DateTime newValue)
    {
        throw new InvalidOperationException("This exception should be caught by the ErrorBoundary!");
    }
}

3. Run the page and select a date in the DatePicker.

Actual Behavior

The exception thrown in the OnDatePickerValueChanged event handler is not caught by ErrorBoundary.

Expected Behavior

The exception thrown in the OnDatePickerValueChanged event handler is caught by ErrorBoundary.

Browser

All

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

No response

Description

Affected components: those inheriting from TelerikSelectBase (e.g., TelerikDropDownList, TelerikComboBox, TelerikMultiSelect, TelerikAutoComplete). When an exception is thrown inside an async Task event handler for the OnChange, OnBlur, OnOpen, and ValueChanged events, the exception is completely and silently swallowed. The exception is not caught by ErrorBoundary.

Related: #6333

Steps To Reproduce

Steps to Reproduce

1. Use a standard ErrorBoundary in MainLayout.razor.

<ErrorBoundary>
    <ChildContent>
        @Body
    </ChildContent>
    <ErrorContent>
        <p class="error">An unhandled error has occurred.</p>
    </ErrorContent>
</ErrorBoundary>

2. Declare a TelerikDropDownList and bind an async Task method to the ValueChanged or OnChange event.

<TelerikDropDownList 
    Data="@DropDownData"                  
    ValueChanged="@( (int newValue) => OnDropDownValueChanged(newValue))"       
    TextField="@nameof(TestItem.Name)"
    ValueField="@nameof(TestItem.Id)" />

<TelerikButton OnClick="@(() => throw new Exception("Exception from button"))">Click to test ErrorBoundary</TelerikButton>

@code {
    private int? SelectedDropDownValue;

    private List<TestItem> DropDownData = new()
    {
        new() { Id = 1, Name = "Select me to throw exception" },
    };

    private async Task OnDropDownValueChanged(int newValue)
    {
        throw new InvalidOperationException("This exception should be caught by the ErrorBoundary!");
    }

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

3. Run the page and select the item in the DropDownList's list.

Actual Behavior

The exception thrown in the OnDropDownValueChanged event handler is not caught by ErrorBoundary.

Expected Behavior

The exception thrown in the OnDropDownValueChanged event handler is caught by ErrorBoundary.

Browser

All

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

No response

Hi !

I tried using the combobox but, since my datasource is too big and I need grouping, therefore virtualization is not possible, I need to do the filtering on the server side, using the OnRead method to fetch my data based on what the user has entered in the input field. The problem is that the client side filtering is always active and I can't reproduce the same type of filtering I do server side on the client side and I lose some results. I think it would be really nice if we could specify to not filter client side or something like that, to give us more control.

Thank you very much !

Hello,

I would like to have the Polar chart available in Blazor.

Radar Chart are nice but the categorical axis are not usable when having directional data to display

Thank you

Thomas

Using the TelerikTabSrip, If the first tab is not visible when rendered, the tab content for all tabs doesnt render.

Replicated here https://blazorrepl.telerik.com/cpEWGOPk22VW8be254

If you change the code to make the first tab visible, all is well.

You can make other tabs invisible, and all is well.

Hi Team,

It might be a better user experience if the user does not have a valid license key to either:

a) make it clear that if the downloader does not have a license assigned the downloaded license key will not be valid

or

b) do not let anyone without a license assigned download the key file (that seems preferable & probably easier to implement)

Thank you!

In our application we use some large datasets and present them in a TelerikGrid. We use WPF + Blazor Hybrid and noticed, that in some cases the memory usage of the Web View process grows up to some gigabytes.

Here a screenshot of the task manager with a lot of RAM usage for the web view.

Here a screenshot of the detached DOM elements after a two navigations. The container divs are not garbage collected.

I tracked down the issue to come from the TelerikGrid, because when I remove it from the pages, everything runs fine. I also removed all GridColumns and the issue is still present. In the developer tools I noticed that one of the parent div elements remains in memory every time I navigate back and forth.

I also created a blank Blazor WebAssembly Standalone application and added a simple instance of the grid. Here, the issue is also present. I attach the one blazor page that causes the issue.

I've tested all major versions from 5.1 upwards, every version is affected.

I have a grid with inline-edit mode where the items have data annotations validation enabled.
When I click the grid command button "add", and then without typing in anything submit in some way, the validation jumps in as it should.

However, if I - without providing more input and still in the same item's edit mode - just click the "add" button again and then submit the item again, the incomplete item is submitted without any further validation.

This is fatal for my purpose, and I can even reproduce the issue here on the Telerik website's example repl: Blazor Grid Editing Inline Editing - Telerik UI for Blazor (after turning off the option "Confirm Cancel Commands").

I would very much appreciate any guidance on how to circumvent that bug while it ist being worked on, since I couldn't yet find a way how to do it.
(As implied above, the confirmation prompt does prevent the bug, however I don't want to use a prompt if possible.)

Here's a list with some cases concerning this bug:
- tap add, submit => validation
- tap add, tap add, submit => submitted!
- tap add, submit (=> validation), tap add, submit => submitted!

Greetings to the team!

In the Appearance section of the ContextMenu component documentation on the Progress Design System Kit website (https://www.telerik.com/design-system/docs/components/contextmenu/#size), it is stated that:

The ContextMenu provides the size configuration option that enables you to control how big or small the rendered submenu items in the popup will be.

I’ve observed that this functionality is implemented in at least one library—Kendo UI for Angular (https://www.telerik.com/kendo-angular-ui/components/menus/contextmenu/appearance#size).

Is there a plan to introduce support for the Size parameter in the ContextMenu component of the Telerik UI for Blazor library?

The problematic behavior can be reproduced in the following case:

• The DropDownList is at the lower part of the page, so the popup is rendered on top of the main element.
• The popup height is set to "auto".

In this scenario, when the user filters, the popup position remains unchanged but its height is reduced to fit the filter results. Thus, the popup looks detached from the main element. The behavior is not the same when the popup is rendered below the main element as in this case its top part sticks to the main element.

Reproduction: https://blazorrepl.telerik.com/mpEHGzOt25F1Znxi57.

===

ADMIN EDIT

===

Add support for DateOnly and TimeOnly properties to the ToODataString() method in the DataSourceExtensions namespace.

===

TELERIK NOTE

@Steven I forked this thread from the already complete feature request Provide support for DateOnly and TimeOnly structs for the respective pickers

Currently DateOnly and TimeOnly types are not supported by the ToODataString() method. As a result, they are serialized with the default ToString() method. Please use DateTime instead or implement a custom serialization method. Downloading our source code and using the built-in method as a base is also an option.

===

ORIGINAL POST

When a user hits the ENTER key at the end of their typing and expects the full text to be submitted, they potentially have partial text being submitted (depending on how quickly ENTER is hit). We know the general accepted solution is to set the DebounceDelay to zero, but we are using two-way binding with state management that results in a very laggy/delayed experience while typing is this is done.

Please allow pressing Enter or blurring the input to short-circuit the debouncing.

===

ADMIN EDIT

===

This request applies to all inputs - NumericTextBox, TextBox, TextArea, etc.

Hi Telerik Support

This is related to the feedback portal item:  The Grid header gets focus only for the first time when tabbing

I had raised the above issue, now I can see that the issue is fixed in 7.0.0. But the fix does not work when the TelerikGrid is inside a TelerikWindow. 

Please find the REPL sample https://blazorrepl.telerik.com/QIvmPrlI39rZ4whP10 

Is there a work around for the scenario where the grid is inside a popup window?

Regards

Bably

Hi,

Can I request that the Pdf Viewer:

- Load multiple pdf files on open. Maybe via an array of file names.

     - We use a different viewer due to this capability. For Human Resource files you need the ability to load numerous files into one viewer to show a complete
         document. The current one file option doesn't work for us.

- Display thumbnails of the loaded pages.
      - Thumbnail onclick to move to a specific page.

Regards,
Graham O'Riley

Steps to reproduce:

1. Insert a simple TelerikGrid on your page
2. Add Columns with templates for each property
3. Specify a Column Template

See https://blazorrepl.telerik.com/GyPvFMFr00zLEEdG00

Problem / Inconvenience

• Context has to be converted/cast before access to the each property is possible
• Grid columns are not generic which makes them hard to use sometimes
• Fields have to be specified by name (may lead to wrong names after changing)

Solution / Feature Request

• Provide new generic columns (to ensure no current implementations break)
  
• Add [CascadingTypeParameter(nameof(TItem))] to the TelerikGrid
• GridColumns automatically "inherit" the typeparam TItem
  

Idea from: Blazor QuickGrid

Benefits

• GridColumns can be specified with Expression
• Template context does not have to be cast anymore
• Renaming properties affect expression or an error is display (property does not exist)

<GridColumn For="@(t => t.Name)">
        <Template>
                <div>
                    @item.Name
                </div>
        </Template>
</GridColumn>

I get validation issues for the selection Checkboxes and the PageSizes dropdown as they do not have id or name attributes:

The behavior can be reproduced in the online demo: Blazor Data Grid - Overview