C＃将字符串转换为语言环境中的double [英] C# convert string to double in locale

问题描述

在我的语言环境中，小数点分隔符是'，'。

In my locale the decimal separator is a ','.

不过，我仍然想编写一个使用＃的数字的C＃应用​​程序。

However I would still like to write a C# application which works with numbers that use the '.' as decimal separator.

        string b = "0,5";
        double db = double.Parse(b); // gives 0.5

        string a = "0.5";
        double da = double.Parse(a); // gives 5, however i would like to get 0.5

推荐答案

您需要将区域性指定为 double.Parse ，例如

You need to specify the culture as the second argument to double.Parse, e.g.

double da = double.Parse(a, CultureInfo.InvariantCulture);

几乎所有的格式化/解析方法都带有重载，使用 IFormatProvider ，并且是最常用的 IFormatProvider 的实现是 CultureInfo 。

Pretty much all of the formatting/parsing methods have overloads taking an IFormatProvider, and the most commonly-specified implementation of IFormatProvider is CultureInfo.

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