I my understanding, the simplest way to get a coding agent provide better assistance to a very specific product like telerik blazor, is by just providing the documentation. 

My first experiments with the telerik mcp server are not succesful. I would think that linking the full documentation directly to the coding agent can seriously lead to better results.

AI Coding agents are doing a great job with more standard frontend framework like react, they seem to be common knowledge. We know that Blazor and in particular Telerik blazor is a niche product (not only niche, but also NICE), so coding agents needs to have clear instructions on everything.

Of course, i don't know how your documentation system works, and how easy it would be to generate .md files from this?

Thanks for looking into this matter

Don't hesitate to contact me directly for further questions or whatsoever.

warm regards

paul

I've noticed this warning is now shown since version 9.0.0. I checked the release notes and don't see any notes reflecting this change. I also checked the documentation and don't see any information about the OnUpdate event. Can we please update the documentation to document the changes? I would like to understand the behavior of OnUpdate so I can move away from ValueChanged.

"warning CS0618: 'TelerikFilter.ValueChanged' is obsolete: 'Use OnUpdate instead.'"

Blazor Filter Events - Telerik UI for Blazor

Since <TelerikGrid> is implemented as two separate <table>s, one for the headers and a second for the grid, it does not show repeated headers on subsequent pages when using the browser's Print feature. 

Due to limitations of the <TelerikGrid> export functionality, I use the browser print function to export PDFs.

I need the table headers to duplicate on subsequent printed and exported pages. 

I wonder if there is a way to duplicate the <thead> info in the second table and suppress its display but enable it for @media Print.

More details in ticket 1691848

Hello,

I am experiencing a crash when trying to remove a FilterField from a TelerikFilter component when using it inside a TelerikDialog. From what I understand, the documentation for the TelerikFilter is out of date ('TelerikFilter.ValueChanged' is obsolete: 'Use OnUpdate instead.') so I did my best trying to put the piece together.

The TelerikFilter code is based on the updated Telerik sample provided here: 'TelerikFilter.ValueChanged' is obsolete: 'Use OnUpdate instead.' but updated based on the documentation for "Filter in a Dialog" provided here: Blazor Dialog Integration - Telerik UI for Blazor

Here is my code:

 <TelerikDialog @ref="@DialogRef" Visible="@ShowDialog" Width="600px" Title="My Dialog" VisibleChanged="@WindowVisibilityChangeHandler">
     <DialogContent>
         <TelerikFilter Value="@Value" OnUpdate="@((value) => OnFilterUpdate(value))">
             <FilterFields>
                 <FilterField Name="@(nameof(Person.EmployeeId))" Type="@(typeof(int))" Label="Id"></FilterField>
                 <FilterField Name="@(nameof(Person.Name))" Type="@(typeof(string))" Label="First Name"></FilterField>
                 <FilterField Name="@(nameof(Person.AgeInYears))" Type="@(typeof(int))" Label="Age"></FilterField>
             </FilterFields>
         </TelerikFilter>
   </DialogContent>
   <DialogButtons>
    <TelerikButton OnClick="@(() => ResetDialogState())">Cancel</TelerikButton>
    <TelerikButton ThemeColor="@(ThemeConstants.Button.ThemeColor.Primary)" OnClick="@(() => PrimaryAction())">Confirm</TelerikButton>
</DialogButtons>
</TelerikDialog>

@code {
private CompositeFilterDescriptor Value { get; set; } = new CompositeFilterDescriptor();

private void OnFilterUpdate(object filter)
{
    if (filter is null)
    {
        return;
    }
    Value = (CompositeFilterDescriptor)filter;
    DialogRef.Refresh();
}

public class Person
{
    public int EmployeeId { get; set; }
    public string Name { get; set; } = string.Empty;
    public int AgeInYears { get; set; }
}
}

The TelerikFilter renders fine and I can add Filters by clicking the "Add Expression" button. However, when I try to remove a filter that was added, I click on the X button on the right. The first time, nothing happens. When I click a second time, I get this error:

 Unhandled exception rendering component: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
      System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
         at System.Collections.ObjectModel.Collection`1.RemoveAt(Int32 index)
         at Telerik.Blazor.Components.Filter.FilterGroup.OnFilterRemove(Int32 index, String removedFilterId)
         at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
         at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

I also have attached a video of the issue to this ticket.

Is this a bug? If not, can you point me in the right direction?
Thanks,

Mathieu

Hello,

 it seems that something is missing to get it working in "SpeecToTextButton". 

how to reproduce:

• tested in different browser(edge,vivaldi,ff), even in private mode https://www.telerik.com/blazor-ui/documentation/components/speechtotextbutton/integration
• load the page

1. click start recording
2. allow microphone access for the first time
3. nothing recorded(it stays max at 2secs in recording state), goto 1

it flickers for a while(at system taskbar, there is also indication of recording) but nothing is "recorded/transcribed".

Is there any additional setup at clientside?

The latest version has broken one of our projects due to; 

• Throw when using Data and OnRead for the same component

So we deliberately used both events which worked quite well (but is now disallowed);

<TelerikGrid Data="@SheetList"
     @ref="_grid"
     SelectionMode="@GridSelectionMode.Multiple"
     @bind-SelectedItems="@SelectedSheets"
     EditMode="GridEditMode.Inline"
     OnRowContextMenu="@OnContextMenu"
     OnRowClick="@OnRowClick"
     OnAdd="OnAddHandler"
     OnEdit="@OnEditHandler"
     OnUpdate="OnUpdateHandler"
     OnCreate="OnCreateHandler"
     OnDelete="OnDeleteHandler"
     OnRead="@(IsFromHierarchy ? null : OnReadItemsAsync)"

This pattern enabled us to create components that did EITHER server-side pagination, or if it was send a data list as a parameter from a parent component, then it would use that instead (and turn off server pagination).

What would now be the recommended pattern for this scenario? Or do we need to duplicate the whole grid in the component (which isnt ideal).

Hello guys,

I know you probably gonna redirect me to these topics:

https://feedback.telerik.com/blazor/1588185-onshapeclick-does-not-trigger-for-every-bubble-or-shape-when-the-bubble-shape-layers-are-created-dynamically

https://feedback.telerik.com/blazor/1581128-ability-to-change-the-color-of-the-shape-on-click

But that is not a solution. The OnShapeClick-Event of the TelerikMap still triggers only if you click the shape, that was added last. Which means if I have 3 shapes in my TelerikMap, only a click on the third map will lead to the OnShapeClick event being triggered.

This is not a feature request, as you told Michael in his bug report und not at all related to the feature request of chaning a shape's color up on clicking it...but this is clearly a bug.

Please provide some short feedback on how / when this will be solved. Otherwise as a user of Blazor UI I have to manually write JavaScript Code, dismantle the DOM, trigger Interop-Methods etc. to achieve that behavior that should actually just work out of the box as documented.

Thanks and best regards!
Sebastian

Do you have a planned date for Telerik UI for Blazor to fully support Visual Studio 2022 Professional?

Telerik UI for Blazor cannot be used with Visual Studio 2022 Professional in Debug mode and Hot Reload. There are couple issues, see below, that seems to be related, and that Telerik are not willing to fix. Those issues render Telerik UI for Blazor unusable when working with Visual Studio 2022 Professional with Hot Reload.

Predefined dialogs are not shown after hot reload updates are applied and Predefined dialogs throw when hot reload updates are applied

Blazor WASM breaks in VS2022 after Hot Reload in UI for Blazor | Telerik Forums

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 !

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

1. Can you please add the ability to choose a chevron instead of a caret to signify there are menu items under it?

2. Can you please add the ability to collapse/expand the menu and just show the icon when collapsed.

For inspiration - https://www.fluentui-blazor.net/NavMenuTree

Thank you.

When a TelerikComboBox is defined inside a window and the ContainmentSelector attribute is set for that window, the ComboBox exhibits erratic behavior: it sometimes fails to open, and selections from the dropdown may not register. Overall, the ComboBox does not function reliably in this configuration.

See attached video for current behavior.

If the ContainmentSelector attribute is removed, TelerikComboBox works as expected.

See attached example to reproduce the issue.

After upgrading to 12.0.0, the Content does not change when clicking tabs. I always see the Content of the first tab.

My project targets .net8.