Javascript object to C# object does not correctly convert double

Question

I'm trying to send a model created using javascript (because it is created manually by the user) to an MVC controller.

The model is quite complex and one class uses the double? type for a variable. It works fine with int numbers but when I use "0.5" the value is set to null.

What is the reason why double value fail and what can I do about it?

Some code:

var serie = {};

serie.Name = $(elem).children("#name").val();

serie.UnitMeasurement = $(elem).children("#unitMeasurement").val();

serie.ThresholdRed = $(elem).children("#redThreshold").val();

serie.ThresholdYellow = $(elem).children("#yellowThreshold").val();


public class Serie
        {
            public string Name { get; set; }
            public string UnitMeasurement { get; set; }
            public double? ThresholdRed { get; set; }
            public double? ThresholdYellow { get; set; }
        }

Answer 1

You can use your class like-

public class Serie
{
    public string Name { get; set; }
    public string UnitMeasurement { get; set; }
    public string ThresholdRed { get; set; }
    public string ThresholdYellow { get; set; }
}

and then while using these varriables you can convert them like-

double? d = Convert.ToDouble(ThresholdRed);

or you can use double.TryParse like-

double d;
bool result = double.TryParse(str, out dbl); // `result` will be the status of tried Parsing (true or false)

EDITED :(

In order to avoid any confusion with culture, encode your parameters before sending like-

var serie = {};
serie.Name = escape($(elem).children("#name").val());
serie.UnitMeasurement = escape($(elem).children("#unitMeasurement").val());
serie.ThresholdRed = escape($(elem).children("#redThreshold").val());
serie.ThresholdYellow = escape($(elem).children("#yellowThreshold").val());

While using them on server, decode them first-

double? d = Convert.ToDouble(HttpUtility.HtmlDecode(ThresholdRed));