Question

可能重复：
How to convert culture specific double using TypeConverter?

我尝试使用Double将“1.000.000”字符串解析为TypeConverter时遇到异常。我在异常时查看System.Globalization.NumberFormatInfo，看起来像这样：

{System.Globalization.NumberFormatInfo}
    CurrencyDecimalDigits: 2
    CurrencyDecimalSeparator: ","
    CurrencyGroupSeparator: "."
    CurrencyGroupSizes: {int[1]}
    CurrencyNegativePattern: 8
    CurrencyPositivePattern: 3
    CurrencySymbol: "TL"
    DigitSubstitution: None
    IsReadOnly: false
    NaNSymbol: "NaN"
    NativeDigits: {string[10]}
    NegativeInfinitySymbol: "-Infinity"
    NegativeSign: "-"
    NumberDecimalDigits: 2
    NumberDecimalSeparator: ","
    NumberGroupSeparator: "."
    NumberGroupSizes: {int[1]}
    NumberNegativePattern: 1
    PercentDecimalDigits: 2
    PercentDecimalSeparator: ","
    PercentGroupSeparator: "."
    PercentGroupSizes: {int[1]}
    PercentNegativePattern: 2
    PercentPositivePattern: 2
    PercentSymbol: "%"
    PerMilleSymbol: "‰"
    PositiveInfinitySymbol: "Infinity"
    PositiveSign: "+"

解析“1.000.000”似乎很好，但它说“1.000.000”不是Double的有效值。问题是什么？我试图覆盖Thread.CurrentThread.CurrentCulture，但它也没有用。

EDITED :::::::::

这似乎也解决了我的问题。 TypeConverter实际上没有ThousandSeperator。我添加了一个它开始工作。

如何使用TypeConverter转换特定于文化的double的可能重复？ - Rasmus Faber How to convert culture specific double using TypeConverter?

Answer 1

试试这个NumberFormatInfo：

var s = "1.000.000";
var info = new NumberFormatInfo
{
    NumberDecimalSeparator = ",", 
    NumberGroupSeparator = "."
};
var d = Convert.ToDouble(s, info);

您可以将NumberDecimalSeparator更改为其他内容，只要它与NumberGroupSeparator不同即可。

编辑：您指定的NumberFormatInfo也应该有用。

Answer 2

Most normal numerical types have parse methods. Use TryParse if you're unsure if it's valid (Trying to parse "xyz" as a number will throw an exception)

For custom parsing you can define a NumberFormatInfo like this:

var strInput = "1.000.000";
var numberFormatInfo = new NumberFormatInfo
{
    NumberDecimalSeparator = ",",
    NumberGroupSeparator = "."
};
double dbl = Double.Parse(strInput, numberFormatInfo);

此解决方案也可以使用

var format = new System.Globalization.NumberFormatInfo();
format.NumberDecimalSeparator = ",";
format.NumberGroupSeparator = ".";
double dbl2 = Double.Parse("1.000.000", format);

1.000.000不是Double c＃的有效值

2 个答案: