float.Parse fails on decimals and commas
Parse is culture aware. If your local culture has different requirements, then you may want to pass a culture or other format provider in. Try using CultureInfo.InvariantCulture
. You won't need the decimal option if you do.
float f = float.Parse(val,
System.Globalization.NumberStyles.AllowThousands,
CultureInfo.InvariantCulture);
using System;
using System.Collections.Generic;
using System.Globalization;
namespace ConsoleApp2
{
class Program
{
static void Main(string[] args)
{
var numList = new List<string>(){"0", "-6e-5", "78.56238", "05.56", "0.5E9", "-45,000.56", "", ".56", "10.4852,64"};
numList.ForEach(num =>
{
// If we use NumberStyles.Float => -45,000.56 is invalid
if (decimal.TryParse(num, NumberStyles.Any, CultureInfo.InvariantCulture, out decimal result))
{
Console.WriteLine(result);
}
else
{
Console.WriteLine(num + " is not a valid number");
}
});
}
}
}