C# float.tryparse for French Culture

Question

I have a user input which can contain float values ranging from : 3.06 OR 3,06 The culture we are in is French and thus when the user inputs 3.06 and I run a float.tryParse

Answer 1

float usedAmount;

// try parsing with "fr-FR" first
bool success = float.TryParse(inputUsedAmount.Value,
                              NumberStyles.Float | NumberStyles.AllowThousands,
                              CultureInfo.GetCultureInfo("fr-FR"),
                              out usedAmount);

if (!success)
{
    // parsing with "fr-FR" failed so try parsing with InvariantCulture
    success = float.TryParse(inputUsedAmount.Value,
                             NumberStyles.Float | NumberStyles.AllowThousands,
                             CultureInfo.InvariantCulture,
                             out usedAmount);
}

if (!success)
{
    // parsing failed with both "fr-FR" and InvariantCulture
}

Answer 2

You can use the overload that takes a format provider. You can pass through a French culture info:

string value;
NumberStyles style;
CultureInfo culture;
double number;

value = "1345,978";
style = NumberStyles.AllowDecimalPoint;
culture = CultureInfo.CreateSpecificCulture("fr-FR");
if (Double.TryParse(value, style, culture, out number))
   Console.WriteLine("Converted '{0}' to {1}.", value, number);
else
   Console.WriteLine("Unable to convert '{0}'.", value);
// Displays:
//       Converted '1345,978' to 1345.978.

Answer 3

You can pass culture inside TryParse method:

public static bool TryParse(string s, NumberStyles style, IFormatProvider provider, out float result);