numeric text box up/down arrows do not work

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Form NumericTextBox
Joel
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Joel asked on 10 Dec 2025, 10:17 PM

For my numeric text box, the up/down arrows do not work in a form.  I did a copy/paste from your example here:

https://www.telerik.com/blazor-ui/documentation/components/numerictextbox/overview



<TelerikForm Model="@Account"
             OnValidSubmit="@OnSave"
             OnInvalidSubmit="@OnInvalidSubmit"
             Class="gsi-margin-10">

    <FormValidation>
        <DataAnnotationsValidator />
    </FormValidation>

    <FormItems>

... <FormItem Field="@nameof(Account.theValue)"> <Template> <LabelFor Model="@Account" DisplayName="Text Value" /> <TelerikNumericTextBox @bind-Value="@Account.theValue" Format="C" Max="5m" Min="-5m" Step="0.33m" /> </Template> </FormItem> </FormItems>

        [NotMapped]
        public decimal theValue { get; set; } = 1.234m;

Hristian Stefanov
Telerik team
commented on 11 Dec 2025, 12:25 PM

Hi Joel,

I tried to reproduce the issue by copying the provided Form structure, and the arrows seem to work correctly on my end as well as in several local projects. Here is the sample I used for testing: REPL link.

Please run and test the REPL sample to check whether you get the same result.

Kind Regards,

Hristian

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Joel
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answered on 27 Jan 2026, 09:42 PM
I have used this numeric control about 6 times in my code and none of them work.  I start a test project and it works fine.  I bind it to an object and tried it bound to the component model.  It will bind to the number so it reflects the value correctly but those up/down arrows do not work.  The other Telerik controls on the page work as expected.  How do I troubleshoot this?
Joel
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commented on 27 Jan 2026, 09:44 PM

I reviewed to ensure I am using the interactive server mode.  Is there a way to see the binding activity?

 

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