Form submitting wrong value from float input in ASP.NET MVC

Question

Today I stumbled across a problem with the number input in a hmtl Form. I'm trying to get an Input from the User in form of a float. For this case i use the Input tag as following (Sorry for the English/German names):

<input asp-for="TBE_Leitwert" type="number" step="0.1" class="form-control"  placeholder="Leitwert (mS)" />

Somehow after submitting the form I don't get the float value. It seems like the Input is ignoring the separator at all, Example:

The User puts in the value 1,1 but submitted was 11.

Value entered from a user:

Value from submitted the form:

The same problem results, even if I put the value 1.1 so it doesn't matter if I take the dot or comma, the value still is submitted wrong as 11

Is there any way to get the right float values from submitting the form without using JS or AJAX?

Edit: I made a super minimal reproducible exampele.

Index Page:

@model TestModel
@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <form asp-controller="Home" asp-action="GetValue">
        <input asp-for="WantedValue" type="number" step="0.1" />
        <button type="submit">Test</button>
    </form>
</div>

HomeController just added this 1 function:

public IActionResult GetValue(TestModel test)
{
    return RedirectToAction("Index");
}

Model:

public class TestModel
{
    public double WantedValue { get; set; }
}

it is still the same, if i enter a float value on the index:

Value entered by User on Index

the Controller still gets a wrong value:

Wrong Value received from Form

since i entered "1,1" on the Index site i was expecting to get the value "1,1" in the controller. Same with the Value "1.1"

This is most likely a Culture problem. I suspect the view is running under either `InvariantCulture` or some `US` derived culture. — Oliver Weichhold, Oct 20 '22 at 10:44
Does this answer your question? [How to change symbol for decimal point in double.ToString()?](https://stackoverflow.com/questions/3135569/how-to-change-symbol-for-decimal-point-in-double-tostring) — MorenajeRD, Oct 20 '22 at 11:48
Sadly not, i cant change the input like in the given example because its already given by using html input type number. Also my problem occurs no matter which separator i use. I tried it with comma and dot, both gets "deleted" when submitted to controller. — Mike Ritter, Oct 20 '22 at 12:06

score 0 · Answer 1 · answered Oct 20 '22 at 14:14

0

You might need to set globalization culture in your project.

In asp.net core, add it in Startup.Configure:

var cultures = new[]
{
 new CultureInfo("en-US"),
 new CultureInfo("de"),
};

app.UseRequestLocalization(new RequestLocalizationOptions
{
    DefaultRequestCulture = new RequestCulture("en-US"),
    SupportedCultures = cultures,
    SupportedUICultures = cultures
});

answered Oct 20 '22 at 14:14

rjs123431

688
4
14

I did implement your suggestion as you told me to. But sadly it still doesn't work. It is the same Problem as before. The Form Submitting `1,1` and `1.1` as `11`. Nonetheless i'm very gratefull for your Help. – Mike Ritter Oct 21 '22 at 06:52

Ali Hamed · Accepted Answer · 2022-10-21T12:39:18.373

0

I know it's not the right way to solve the problem but it works. Try to use input type text instead of number like:

<input type="text" />

And then in the controller convert it to double in this way:

var number = collection["Number"];
var numberr = double.Parse(number.Replace('.', ','));

I hope this help you.

edited Oct 21 '22 at 12:39

answered Oct 21 '22 at 12:34

Ali Hamed

316
1
1
12

Thanks for your Help. This will work, but if the user enters something else than a number i run into a problem i guess. Maybe i'm also to picky, because i wanted to keep the nice error message of HTML bootstrap if the user enters an invalid number when try to submit. – Mike Ritter Oct 21 '22 at 13:20
I know that so it would be annoying to check that what the user entered contains only numbers inside the controller before redirecting the process to the same page to display an error message – Ali Hamed Oct 21 '22 at 13:31

Form submitting wrong value from float input in ASP.NET MVC

2 Answers2