Hi Kristofer,

Thank you for your input!

I have moved the item out of the upcoming release, so we can discuss it with the development team and revisit our approach. Your feedback is appreciated and we will take it into consideration when working on the fix.

Regards,
Nadezhda Tacheva
Progress Telerik

Hi Kristofer,

I am currently working on this item and I am stepping in to provide an update based on my findings.

The root cause for the problem is the sign used for the negative values. In the majority of the cultures, the negative values are marked with hyphen-minus (U+002D). However, in the Swedish culture (and potentially other cultures) the sign used for negative values is minus (U+2212). This is basically a different character which is not valid for the NumericTextBox and thus, it blocks further input. For reference, you may check the behavior of the default <input type=number /> that also does not allow minus sign (only hyphen-minus).

My research shows that this behavior is related to the CLDR. See more information in this issue: https://github.com/dotnet/runtime/issues/44678.

I see that to handle the scenario, one can specify NumberFormat = { NegativeSign="-" } in the culture setting if one wants to prevent visualizing minus sign for various reasons.

I tested this configuration on my end and I can confirm that with it I am not hitting the discussed problem.

var defCulture = new CultureInfo("sv-SE") { NumberFormat = { NegativeSign = "-" } };

app.UseRequestLocalization(
           new RequestLocalizationOptions()
           {
               DefaultRequestCulture = new RequestCulture(defCulture)
           });

Can you please also test this setup and let me know if the NumericTextBox properly works with negative values on your end?

If so, we can close the issue as this is a matter of configuring the culture in the application and not dependent on the component. 

Regards,

Nadezhda Tacheva
Progress Telerik

Hi Kristofer,

I managed to reproduce the issue on my end and it does seem like a bug to me. Thank you for pointing our attention to this! As a small gesture of appreciation for your report, I have rewarded your account with some Telerik points.

I tweaked the title a bit to provide some more clarity on the specific problem. I also added your vote to the item and as a creator, you are automatically subscribed to get status updates via email.

I'm afraid there is no workaround I can suggest for the time being and I hope our development team will be able to address this issue soon.

Regards,
Nadezhda Tacheva
Progress Telerik