Double parse with culture format

问题

I have a double number as string. The number is

202.667,40

Which is 202667.4

How can I parse this string to get the value like: Double.Parse(\"202.667,40\",?what here), or any other method to get the value would be great. Thanks

回答1:

First, you need to know which culture this number is from, then:

CultureInfo culture = new CultureInfo("de"); // I'm assuming german here.
double number = Double.Parse("202.667,40", culture);

If you want to parse using the current thread culture, which by default is the one set for the current user:

double number = Double.Parse("202.667,40", CultureInfo.CurrentCulture);

回答2:

I think i have found a solution which does not require a culture. Using a NumberFormatInfo you can force a format, no matter the culture:

// This is invariant
NumberFormatInfo format = new NumberFormatInfo();
// Set the 'splitter' for thousands
format.NumberGroupSeparator = ".";
// Set the decimal seperator
format.NumberDecimalSeparator = ",";

Then later:

System.Diagnostics.Debug.WriteLine(double.Parse("202.667,40", format)));

Outputs:
202667,4

Of course, this output (inner toString()) might differ per Culture(!)
Note that changing the input to "202,667.40" will result in a parse error, so the format should match your expected input.

Hope this helps someone..

回答3:

For more flexibility you can set NumberDecimalSeparator

string number = "202.667,40";
double.Parse(number.Replace(".", ""), new CultureInfo(CultureInfo.CurrentCulture.Name) {NumberFormat = new NumberFormatInfo() {NumberDecimalSeparator = ","}});

回答4:

You could use Double.Parse(your_number, CultureInfo.CurrentCulture) and set CurrentCulture accordingly with Thread.CurrentThread.CurrentCulture.

Example:

Thread.CurrentThread.CurrentCulture = new CultureInfo("es-ES");

then later

Double.Parse(your_number, CultureInfo.CurrentCulture);

Note that if you explicitly assign the culture to the CurrentThread, it only applies to that thread.

回答5:

Instead of having to specify a locale in all parses, I prefer to set an application wide locale, although if string formats are not consistent across the app, this might not work.

CultureInfo.DefaultThreadCurrentCulture = new CultureInfo("pt-PT");
CultureInfo.DefaultThreadCurrentUICulture = new CultureInfo("pt-PT");

Defining this at the begining of your application will make all double parses expect a comma as the decimal delimiter.

回答6:

var val=double.Parse( yourValue, CultureInfo.InvariantCulture);

http://www.erikschierboom.com/2014/09/01/numbers-and-culture/

回答7:

Double.Parse("202.667,40", new System.Globalization.CultureInfo("de-DE"));

Instead of de-DE use whatever culture the string is in.

来源：https://stackoverflow.com/questions/5109816/double-parse-with-culture-format

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int32