CODEWITHSUNDEEP
c#
niknowj
niknowj

Reputation: 1037

Thousand separated value to integer

I want to convert a thousand separated value to integer but am getting one exception.

double d = Convert.ToDouble("100,100,100");

is working fine and getting d=100100100

int n = Convert.ToInt32("100,100,100");

is getting one format exception

Input string was not in a correct format

Why?

Upvotes: 12

Views: 7404

Answers (4)

kemiller2002
kemiller2002

Reputation: 115518

What Convert.ToInt32 is actually calling in your example is Int32.Parse.

The Int32.parse(string) method only allows three types of input: white space, a sign, and digits. In the following configuration [ws][sign]digits[ws] (in brackets are optional).

Since your's contained commas, it threw an exception.

Upvotes: 1

matt
matt

Reputation: 9412

try this:

int i = Int32.Parse("100,100,100", NumberStyles.AllowThousands);

Note that the Parse method will throw an exception on an invalid string, so you might also want to check out the TryParse method as well:

string s = ...;
int i;
if (Int32.TryParse(s, NumberStyles.AllowThousands, CultureInfo.InvariantCulture, out i))
{
    // if you are here, you were able to parse the string 
}

Upvotes: 30

Ivan Bohannon
Ivan Bohannon

Reputation: 707

You can't have separators, just numbers 0 thru 9, and an optional sign.

http://msdn.microsoft.com/en-us/library/sf1aw27b.aspx

Upvotes: 0

Andrea Pigazzini
Andrea Pigazzini

Reputation: 357

Because you're supposed to specify a string containing a plain integer number (maybe preceded by +/- sign), with no thousands separator. You have to replace the separator befor passing the string to the ToInt32 routine.

Upvotes: 0

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