Windows Phone和仿真器之间的不一致

Question

To tell shortly what I experienced; I have a String in a floating number form to be converted into Double. For Windows Phone 7 Device, it can only convert the numbers fractioned with "comma" (eg 46,211), For Emulator 8, it can only convert with "dot" (eg 46.211). If you do contrastly, one of them crashes.

Why such a simple crappy thing occurs? Anyone noticed this before?

void getconditions(string evaulate)
{
    int i = 0;
    string[] evaluatearray = evaulate.Split(new Char[] { ':' });

    foreach (string s in evaluatearray)
    {
        conditions[i] = Convert.ToDouble(s);
        i++;
        if (i == conditions.Length) break;
    }
}

So in this code, s contains fractioned number strings, then I convert them into double as shown above. Thanks

Answer 1

This is because you're trying to parse the number without specifying the culture. In those cases, the default culture will be used. What happens is simply that the language of the emulator is different of the language of your phone.

As a rule of thumb, you should never call a .Parse method without specifying the culture. The same rule applies when converting a number or a date to string by using the .ToString method.

double number;

// Use the invariant culture when the culture is irrelevant
// (typically, when you are parsing numbers generated by an application of your own)
number = double.Parse("46.211", CultureInfo.InvariantCulture);

// Use a specific culture in all the other cases:
number = double.Parse("46,211", CultureInfo.GetCultureInfo("en-GB"));
number = double.Parse("46.211", CultureInfo.GetCultureInfo("en-US"));