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c#stringtype-conversiondecimal
John V
John V

Reputation: 5047

Convert.ToDecimal does not work with string "9.02"

I changed my whole app from "float" to decimal but in one point, I just cannot resolve this issue:

string a="9.02"

decimal d=Convert.ToDecimal(a);

It throws an exception, incorrect input string format. Why?

Upvotes: 0

Views: 4667

Answers (1)

Soner Gönül
Soner Gönül

Reputation: 98750

Convert.ToDecimal(string) method uses CurrentCulture by default. Here how it's implemented;

public static decimal ToDecimal(String value)
{
   if (value == null)
       return 0m;
   return Decimal.Parse(value, CultureInfo.CurrentCulture);
}

Probably your CurrentCulture's NumberDecimalSeparator property is not . and that's why this method throws FormatException.

As an alternative, you can use InvariantCulture (which it's NumberDecimalSeparator is .) as a second parameter in your Convert.ToDecimal(String, IFormatProvider) method or you can Clone your CurrentCulture and set it's NumberDecimalSeparator propert to dot.

string a = "9.02";
decimal d = Convert.ToDecimal(a, CultureInfo.InvariantCulture);

or

string a = "9.02";
var clone = (CultureInfo)CultureInfo.CurrentCulture.Clone();
clone.NumberFormat.NumberDecimalSeparator = ".";
decimal d = Convert.ToDecimal(a, clone);

Upvotes: 7

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