double.NaN.ToString（）以“¤¤¤”结尾不是预期的“NaN” [英] double.NaN.ToString() ending up "¤¤¤" not as Expected "NaN"

问题描述

double.NaN.ToString（）以"¤¤¤"结尾不是预期的"NaN"为什么会这样？

double.NaN.ToString() ending up "¤¤¤" not as Expected "NaN" why is this?

在执行 

  System.Globalization.NumberFormatInfo numberFormatInfo =

    （System.Globalization.NumberFormatInfo）System.Globalization.NumberFormatInfo.CurrentInfo.Clone（）;

 System.Globalization.NumberFormatInfo numberFormatInfo =
    (System.Globalization.NumberFormatInfo)System.Globalization.NumberFormatInfo.CurrentInfo.Clone();

numberFormatInfo.NaNSymbol is "¤¤¤"

numberFormatInfo.NaNSymbol is "¤¤¤"

这是为什么？

// m

---系统-------------------------------- ---------------------------

--- System -----------------------------------------------------------

Windows 10（1709 16299.192），zh -Gb版本，国家或地区"瑞典"，语言" Svensaka"

Windows 10 (1709 16299.192), en-Gb version, Country or region "Sweden", Language "Svensaka"

VisualStudio.15.Release / 15.5.5 + 27130.2026

Microsoft .NET框架

版本4.7.02556

VisualStudio.15.Release/15.5.5+27130.2026
Microsoft .NET Framework
Version 4.7.02556

---------------------- ----------------------------------------

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moviestar

moviestar

推荐答案

这似乎表明你'使用没有语言包的语言。由于无法转换字符，因此使用替换字符。您上面发布的代码似乎只是您正在做的事情的一部分。由于您实际上并不是
更改任何值，因此克隆只是原始副本的副本。 这段代码打印出来的是什么？

That would seem to indicate you're using a language that doesn't have a language pack. Since the characters couldn't be converted it uses the replacement chars. The code you posted above seems like only a part of what you're doing. Since you're not actually changing any values the clone is just a copy of the original.  What does this code print out?

var result1 = Double.NaN.ToString();

var numberFormatInfo = System.Globalization.NumberFormatInfo.CurrentInfo.Clone() as System.Globalization.NumberFormatInfo;

var result2 = numberFormatInfo.NaNSymbol;

result1和result2应该相同。

result1 and result2 should be the same.

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