C＃字符串到浮点转换 [英] C# String to Float Conversion

问题描述

我需要将一个字符串转换为一个浮点数。这是我的例子字符串：

1 MW +00000.00 mm

2 MW +0000.000 mm

3 MW -00000.01 mm

4 MW +00000.00 mm

5 MW +00002.92 mm

6 MW +00002.69 mm
<这是我正在做的：

  text = text.Substring（pos + 5，9）.Trim ）; 
 float val = 0.0F; 
 float.TryParse（texto，out val）; 
 this.txtDimension1.Text = val.ToString（）; 
  

好的，这适用于我的环境，即en_US，但是当我运行同一段代码在西班牙语环境中，它将-00000.01转换为-1.0。我认为这是一个逗号问题，英文数字之间用点分隔（。）和西班牙语

我怎样才能使这两个langs工作？

感谢，
Richard。

解决方案

您需要传递文化格式的CultureInfo。

http：// msdn.microsoft.com/en-us/library/3s27fasw.aspx

MSDN的例子是：

 双数; 
 
 string value =1,097.63; 
 NumberStyles style = NumberStyles.Number | NumberStyles.AllowCurrencySymbol; 
 CultureInfo culture = CultureInfo.CreateSpecificCulture（en-US）; 
 if（Double.TryParse（value，style，culture，out number））
 Console.WriteLine（Converted'{0}'to {1}。，value，number）; 
 else 
 Console.WriteLine（无法转换{0}，value）; 
  

另外，如果您的输入字符串的格式不同，请使用 CultureInfo.CurrentCulture

I need to convert a string to a float. These is is my example string:

1 MW +00000.00 mm
2 MW +0000.000 mm
3 MW -00000.01 mm
4 MW +00000.00 mm
5 MW +00002.92 mm
6 MW +00002.69 mm

And this is what i'm doing:

text = text.Substring(pos + 5, 9).Trim();                  
float val = 0.0F;
float.TryParse(texto, out val);
this.txtDimension1.Text = val.ToString();

Okay, this works for my environment, which is en_US, but when i run this same piece of code in an Spanish environment, it converts -00000.01 to -1.0

I think it's a comma problem, in english numbers are separated by a dot (".") and spanish they are separated by a comma (",").

How can i make this work on both langs?

Thanks, Richard.

解决方案

You need to pass the CultureInfo for the culture that the strings are formatted in.

http://msdn.microsoft.com/en-us/library/3s27fasw.aspx

The example from MSDN would be:

double number;

string value = "1,097.63";
NumberStyles style = NumberStyles.Number | NumberStyles.AllowCurrencySymbol;
CultureInfo culture = CultureInfo.CreateSpecificCulture("en-US");
if (Double.TryParse(value, style, culture, out number))
   Console.WriteLine("Converted '{0}' to {1}.", value, number);
else
   Console.WriteLine("Unable to convert '{0}'.", value);

Alternatively, if your input strings are formatted differently then use CultureInfo.CurrentCulture

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