C# 货币格式

Currency formatting

提问by Ryan

This should be an easy problem but...

这应该是一个简单的问题，但是......

I need to format a currency for display (string) in C#

我需要在 C# 中格式化显示（字符串）的货币

The currency in question will have its own rules such as the symbol to use and if that symbol should come before the value (e.g. $ 10) or after (e.g. 10 ? which is Vietnamese Dong).

有问题的货币将有自己的规则，例如要使用的符号，以及该符号是应该在值之前（例如 $10）还是之后（例如 10 ？这是越南盾）。

But how the numbers are formatted depends upon the users local, not the currency.

但是数字的格式取决于本地用户，而不是货币。

E.g.

例如

1.234,56 ? should be displayed to a user in Vietnam but 
1,234.56 ? should be displayed to a user in the US

(formatted as code so easy to see difference between , and.)

（格式化为代码，很容易看出 , 和 之间的区别。）

So code like

所以代码就像

Double vietnamTotal = 1234.56;
return vietnamTotal.ToString("c");  

Won't work as it will use the users (or more accuratly CultureInfo.CurrentCulture) locale for format and currency so you would get things like $1,123.56 - right use of , and . but wrong symbol.

不会起作用，因为它将使用用户（或更准确地说是 CultureInfo.CurrentCulture）语言环境来设置格式和货币，因此您会得到 1,123.56 美元之类的东西 - 正确使用 , 和 。但错误的符号。

Double vietnamTotal = 1234.56;
CultureInfo ci = new CultureInfo(1066); // Vietnam
return vietnameTotal.ToString("c",ci)); 

Would give 1.234,56 ? - Right symbol, wrong use of , and . for current user.

会给 1.234,56 吗？- 正确的符号，错误地使用 , 和 。对于当前用户。

This post gives more detailon the right thing to do, but not how to do it.

这篇文章详细介绍了正确的做法，但没有详细说明如何去做。

What obvious method hidden in the framework am I missing?

我错过了什么隐藏在框架中的明显方法？

采纳答案by Jon Skeet

• Take the NumberFormatInfofrom the user's currency, and clone it
• Set the CurrencySymbolin the cloned format to the CurrencySymbolof the currency in question
• If you want the currency position (and some other aspects of the format) to be copied, set CurrencyPositivePatternand CurrencyNegativePatternin the same way.
• Use the result to format.

• NumberFormatInfo从用户的货币中取出，并克隆它
• 将CurrencySymbol克隆格式中的 设置CurrencySymbol为相关货币的
• 如果您希望复制货币头寸（以及格式的其他一些方面），请以相同的方式设置CurrencyPositivePattern和CurrencyNegativePattern。
• 使用结果进行格式化。

For example:

例如：

using System;
using System.Globalization;

class Test
{    
    static void Main()
    {
        decimal total = 1234.56m;
        CultureInfo vietnam = new CultureInfo(1066);
        CultureInfo usa = new CultureInfo("en-US");

        NumberFormatInfo nfi = usa.NumberFormat;
        nfi = (NumberFormatInfo) nfi.Clone();
        NumberFormatInfo vnfi = vietnam.NumberFormat;
        nfi.CurrencySymbol = vnfi.CurrencySymbol;
        nfi.CurrencyNegativePattern = vnfi.CurrencyNegativePattern;
        nfi.CurrencyPositivePattern = vnfi.CurrencyPositivePattern;

        Console.WriteLine(total.ToString("c", nfi));
    }
}

Admittedly my console doesn't manage to display the right symbol, but I'm sure that's just due to font issues :)

诚然，我的控制台无法显示正确的符号，但我确定这只是由于字体问题:)

回答by Black Light

Sorry, I may be being a little slow here, but I still don't see your point. It seems to me that the original question is "I have a dong value which, in Vietnam, I want displayed as per Vietnamese currency format, with a "?" symbol, and in the US, I want displayed as per US currency format, but still with a "?".".

抱歉，我在这里可能有点慢，但我仍然没有明白你的意思。在我看来，最初的问题是“我有一个 dong 值，在越南，我希望按照越南货币格式显示，并带有“？”符号，而在美国，我希望按照美国货币格式显示，但仍然带有“？”。.

I guess I'm getting confused by the two contradictory statements... "The currency in question will have its own rules"and "how the numbers are formatted depends upon the users local [sic], not the currency."

我想我对这两个相互矛盾的陈述感到困惑...... “有问题的货币将有自己的规则”和“数字的格式取决于本地用户[原文如此]，而不是货币。”

If all you wanted to change was the currency symbol, and leave the formatting as per the current culture, wouldn't cloning the nfi and setting the symbol be enough ?

如果您只想更改货币符号，并根据当前文化保留格式，那么克隆 nfi 并设置符号还不够吗？

     NumberFormatInfo nfi;

     // pretend we're in Vietnam
     Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo("vi-VN");

     nfi = CultureInfo.CurrentCulture.NumberFormat.Clone() as NumberFormatInfo;
     nfi.CurrencySymbol = "?";

     String s1 = (1234.5678).ToString("c", nfi);

     // pretend we're in America
     Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo("en-US");

     nfi = CultureInfo.CurrentCulture.NumberFormat.Clone() as NumberFormatInfo;
     nfi.CurrencySymbol = "?";

     String s2 = (1234.5678).ToString("c", nfi);

回答by Kozack Lixeer

To work with a textbox, try the following:

要使用文本框，请尝试以下操作：

textBox2.Text = "Rp" + (textBox1.Text = string.Format(System.Globalization.CultureInfo.GetCultureInfo("id-ID"), "{0:#,##0.00}", double.Parse(textBox1.Text)));