Hi

I want to add a textbox in the  GridToolBarTemplate. Because of the built-in arrow navigation it is not possible to move the cursor inside the textbox. Is it possible to disable the default arrow navigation in the GridToolBar?

Example in this simple REPL

Enter any text in the Textbox, hit the left arrow keyboard button and notice the cursor stays at the end of the text.

Best regards

Bram

Hi all,

I've been observing a strange behavior and cannot seem to find out what causes it. This is primarily to collect some general ideas and learn about principles that I may have missed. I hate to say it but the fact I'm posting it here already suggests that Telerik Blazor UI might be involved, even if it is only by me using it wrong. Before I switched (from Bootstrap UI) to Telerik's Blazor UI, the solution operated more swiftly but was optically inconsistent if not outright ugly. Using Telerik Blazor UI introduced the desired consistency and working with the components is mostly a breeze. I don't regret my choice at all, and will do whatever is needed to keep it part of the solution.

For more context: this is about a multi-layered Blazor app (ASP.NET Core 8) using Telerik's Blazor UI to give users CRUD operations on medical case data. It is supposed to show data from an Oracle relational database with Entity Framework (EF Core 8). It's a data-first approach so I have built entity classes representing each table (about 30 tables in total now) and configured their relations mostly manually. But that's not actually the point. It's just to describe why I can't just paste a small code snippet here. It's a medical application so I'm legally unable to paste code 1:1 from my solution, and it's tons of code by now. Hope the description I'm giving below is enough to put you in the frame.

There are multiple Razor pages and components, some with more and some with less complexity:

• entry pages where users select a quarter and doctor's office
• next page reveals the cases that need work
• selecting a case will go to the editor Blazor page which:
  • shows case basic data such as patient, insurance, summary
  • shows relational positional data in up to four separate grids (Telerik Data Grid) which are encapsulated in Razor components again to keep the main page as slim as possible
  • allows CUD operations and validations on relatonal data
  • uses models to do real-time calculations when users are modifying data
  • uses a persistence layer to collect changes and update storage

The editor page (the heaviest piece of the solution) features:

• a Telerik menu bar
• a Telerik breadcrumb bar
• a Telerik dock manager
• up to 8 dock panes, half containing Razor components rendering HTML tables, the other half being Telerik data grids
• some interaction between DockManager and menu bar for menu items to control the visibility and arrangement of panes
• lots of Telerik(MultiColumn)ComboBox, TelerikTextBox, TelerikDatePicker, TelerikNumericTextBox, TelerikMaskedTextBox etc. inside the panes for data representation and editing

All pages use InteractiveServer render mode as that is what I found works best for me. Until now, the software is only running on my dev machine in Visual Studio 2022, and most of the time in debug mode.

IMPORTANT: Let me emphasize that what I am describing here appears exclusively in debug mode as long as VS2022 is attached, and not when the solution is run by dotnet run. It's a p.i.t.a. though to debug with the handbrake engaged, and I'm not sure if the process does not hide a problem even when it runs without a debugger attached. It's just much faster then but that's not proof that whatever issue it is only affects the debug scenario.

The problems begin when I start navigating between the pages. Sometimes it's really fast, sometimes the same thing takes a lot of time. In my perception it might be related to how quickly I navigate but the actual trigger for the behavior is mostly unclear at this time. Heavier pages cause longer delays (and more exceptions along the way), while being loaded as well as while navigating away from them. But it's not consistent enough to point to an overall page or DOM size-related issue.

What struck me is that the debug console gets flooded with errors like these as delays are happening:

Exception thrown: 'Microsoft.JSInterop.JSDisconnectedException' in Microsoft.JSInterop.dll
Exception thrown: 'Microsoft.JSInterop.JSDisconnectedException' in System.Private.CoreLib.dll
Exception thrown: 'Microsoft.JSInterop.JSDisconnectedException' in System.Private.CoreLib.dll
Exception thrown: 'Microsoft.JSInterop.JSDisconnectedException' in Microsoft.AspNetCore.Components.Server.dll

The one from System.Private.CoreLib.dll appears twice most of the time, sometimes only once. A block like this is shown repeatedly up to 90 times in quick succession, in worse cases, sometimes only ten of these blocks appear in the console. But it's always this combination of the same three DLLs being addressed. When this happens, no other exceptions mix in, it's a constant stream of these three / four exceptions. The application is massively slowed down as this happens. Not as much as showing me a waiting indicator and reconnecting in the page though.

What's also interesting is that the user-end of the solution, besides being very slow at times, behaves fully normally. There are no errors or exceptions apparent to the user. To me this looks like the exceptions are silently consumed somewhere without giving further detail. Each occurrence takes some processing time. I can't say where the exceptions are thrown - probably somewhere deep inside the JS layers - but it's really unsettling and I have some doubts about moving this to production unless this is clarified a bit better.

The Edge browser's developer tools show nothing unusual. The JavaScript console there stays error-free, and running a network recording during a page refresh does show that loading takes very long (about 5 out of 10 seconds are spent with no traffic at all), but all HTTP operations have status 101 (switching protocols) or 200 (success). No error indication at all there.

I beg your pardon for being too unspecific where it may count but this is honestly my first Blazor application at all, and it's a monster of a project right away. I'm overwhelmed by the time pressure already and there's no team mates to help out. Random delays are the last thing I need.

So to wrap this up, what I'm looking for is basically guidance like:

• is ServerInteractive (and no prerendering) a preferable mode to use globally?
• do I have to clean up anything? I was hoping the Telerik components would take care of their memory allocations and connections on their own. If that's wrong or not enough, is IDisposable the way to go? What would have to be forcefully disposed?
• are there any typical no-nos about Blazor apps that I might have missed, such as exceeding a hidden limit regarding the amount of HTML elements in the DOM, or having to keep the number of data grids to a minimum? Could two-way bindings be a root cause? (I'm using them a lot)
• I'm using async wherever it makes sense, assuming that's the way to go nowadays. Anthing special about Blazor regarding async?
• sometimes, I need to call StateHasChanged() to ensure the UI is up-to-date. This may indicate I'm missing a cleaner way to achieve the same, however, I couldn't find anything about this yet

Thank you all for reading, and in advance for any clues.

Cheers, have a nice day!

Joe

I'm trying to programmatically set the Text color of TelerikTextBox.  Problem I'm running into is that the Class being defined for the TelerikTextBox is based on CSS from TailwindCSS.  I was hoping I could just add color: as a parameter but that would only work if using a "Style" not "Class" and TelerikTextBox doesn't support Style.

<style>
    .safeText {
    color: black;
    }

    .warningText {
    color: red;
    }
</style>

<TelerikTextBox Id="emptyReleaseOn" Class="form-display sm:text-sm sm:leading-5 text-center @(_expireColor)" Size="12" Value="@_currentBookingMTYRelease" ReadOnly="true" Width="6rem"></TelerikTextBox>

Note: the above @(_expireColor) is not valid syntax to be used in Class attribute ... so not really sure how to go about this?

Code server-side:

private string _expireColor { get; set; } = "safeText";

if (DateTime.TryParse(_currentBookingExpiresOn, out var expireDateValue))
{
    if (DateTime.Now > expireDateValue)
    {
        _expireColor = "warningText";
    }
    
}

I found Telerik sample code here, but that's not what I'm trying to accomplish (need to retain the TailwindCSS).

Is there an easy way to accomplish this?

Rob.

Hello Telerik,

In my Blazor Hybrid application, I have a toolbar with a textbox in it; I want to add some hotkeys to it: on pressing Enter, process the textbox value, and in pressing Escape, revert the textbox value to the default.

The problem is with the toolbar. I have this piece of code:

@code {
    private void OnKeyUp(KeyboardEventArgs args)
    {
        Debug.WriteLine("key up: " + args.Code);
    }
}
<TelerikToolBar>
    <ToolBarTemplateItem>
        <div @onkeyup="OnKeyUp" tabindex="-1">
            <TelerikTextBox Value="Some Value" />
        </div>
    </ToolBarTemplateItem>
</TelerikToolBar>

It works perfectly for any pressed key, including Enter - except the Escape key. When I press Escape, the textbox loses focus, and I don't get the keyboard event. I tried the keydown and keypress events, too.

In contrast, when I press Tab, I get the keydown event before the textbox loses focus (but no keyup event).

If I place the textbox directly on the page, without the toolbar, the keydown and keyup events work correctly, and I get the events for the Escape key. Apparently, TelerikToolBar is doing... something.

Is there a way to:
a) make the toolbar less aggressive and let me handle the keydown/keyup events, or
b) detect the Escape and Enter keyclicks from the TelerikTextBox component, to avoid the need for handling the javascript events?

As a curiosity, when focussed on this text box, try pressing Win and then Escape. It produces this sequence of events: "keydown MetaLeft" -> "focusout" -> "focusin" -> "keyup Escape". Yes, you get the Escape event, and the focus returns to the textbox.

Thank you.

I have a scenario where I need to shift the position of TelerikTextBox's `k-input-inner` element using the CSS properties`top` and `left`. This works fine until I use FocusAsync() to programmatically focus on the textbox. This causes the textbox to reset its position and disregard the position styling.

Please see the REPL link below. To reproduce, click on the "Focus" button and observe how the placeholder shifts.

https://blazorrepl.telerik.com/wTkelobC56YIRoZL13

To note, the desired view is with the input text position shifted from the original position like so:

Hitting tab reverts it to the original positioning which is undesirable:

Is there a way to add a stylesheet to the prosemirror in the iframe?

I want to add a plugin for a Placeholder eg:

https://gist.github.com/amk221/1f9657e92e003a3725aaa4cf86a07cc0

Also: is there a way to let the user change the height of the TelerikEditor, just like with a text area (bottom right corner)?

I have some Grids which are fully managed by the TelerikGrid control (as far as sorting, filtering, and pagination goes). These grids use the Data property on the Grid. These TelerikGrids are using the <GridSearchBox />.

I am now building some API-driven grids, which are using the OnRead property. For the API-driven Grids I'm using a TelerikTextBox for searching, instead. I would like this grid to look the same as the managed grids.

Is there any way to make the TelerikTextBox look identical to the GridSearchBox?

I have followed this example to replace the GridSearchBox with a TelerikTextBox, but the appearance is very different.
Blazor Search Grid on Button Click - Telerik UI for Blazor

Thank you

-Adam

I'm trying to get Telerik working in a simple login form and I can't get the binding to work. This is a .NET 8 Blazor Web Assembly app. To narrow it down, I followed the instructions outlined here. I selected "Individual Accounts" for authentication and WebAssembly for Interactive render mode (and Global for Interactivity location as suggested in the article). I also included the sample pages and changed the email field in the login page to:

<TelerikTextBox @bind-Value="Input.Email" class="form-control" placeholder="name@example.com" />

When I submit the form, it says the Email field is required. It works fine with a standard InputText. I thought maybe it has to do with the control in an EditForm on the server since the click event works fine on a client page but I've seen other examples where it's supposed to work in an EditForm as well.

Hi, my goal is validate a form and focus telerik widget with validation errors.  

Now i can find the element search for class "k-invalid" but how to get the widget reference so i can call the FocusAsync() method?

Thanks