converting string to decimal in c#

问题

I am having some problems converting string to decimal values with decimal.parse. This is the line of code I have:

fixPrice = decimal.Parse(mItemParts.Groups["price"].Value.Replace("$", "").Replace(" ", "").Replace("usd", ""));

The value from which I am trying to convert is: '$779.99'

Then once the parsing to decimal happens, I am getting this value: 77999.

I would like to get 779.99 instead of 77999. Thanks in advance, Laziale

Regex included: "@"\[^\""]+?)\""[^~]+?\]+?src=\""(?[^\""]+?)\""[^>]+?title=\""(?[^\""]+?)\""[^~]+?price\"">(?[^\<]+?)\<[^~]+?\(?[^\<]+?)\

回答1:

I would use Decimal.TryParse():

decimal parsedDecimal = 0;
string yourCurrency = "$779.99";
bool didParse = Decimal.TryParse(yourCurrency,
                                 NumberStyles.Currency,
                                 new CultureInfo("en-US"), out parsedDecimal);

if(didParse) {
    // Parse succeeded
}
else {
    // Parse failed
}

回答2:

It appears that you are running this in a culture where '.' is the group separator, and ',' is the decimal separator. To get around that, use the Parse overload that takes a CultureInfo:

fixPrice = decimal.Parse(stringExpression, CultureInfo.InvariantCulture);

Also look into the NumberStyles enum so you don't have to worry about currency signs yourself:

fixPrice = decimal.Parse(stringExpression, NumberStyles.Currency, new CultureInfo("en-US"));

回答3:

Pass a CultureInfo instance of the culture you are parsing from.

CultureInfo inherits from IFormatProvider

edit:

Here is a sample for the conversion

Decimal.Parse(yourValue, NumberStyles.AllowCurrencySymbol |
                         NumberStyles.AllowDecimalPoint   |
                         NumberStyles.AllowThousands,
              CultureInfo.InvariantCulture);

回答4:

This works for me:

string decStr = "$779.99";
CultureInfo ci = new CultureInfo("en-US");
decimal fixPrice = decimal.Parse(decStr, NumberStyles.Currency, ci);

来源：https://stackoverflow.com/questions/10145186/converting-string-to-decimal-in-c-sharp

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ASP.NET

visual-studio-2010

decimal