MSDN 上有一篇关于 Single.TryParse 的文章,其中包含以下示例代码: http://msdn.microsoft.com/en-us/library/26sxas5t%28v=vs.100%29.aspx
// Parse a floating-point value with a thousands separator.
value = "1,643.57";
if (Single.TryParse(value, out number))
Console.WriteLine(number);
else
Console.WriteLine("Unable to parse '{0}'.", value);
文章中的问题是 TryParse 返回 true
并且字符串已转换,但当我尝试它时,它是 false
。我该如何解决这个问题?
UPD:为了简化解析,可以使用这两行:
NumberStyles style = System.Globalization.NumberStyles.Any;
CultureInfo culture = CultureInfo.InvariantCulture;
此设置允许解析负 float 和带有前导和尾随空格字符的字符串。
最佳答案
你需要这样设置文化
using System.Globalization;
string value = "1345,978";
NumberStyles style = System.Globalization.NumberStyles.AllowDecimalPoint;
CultureInfo culture = System.Globalization.CultureInfo.CreateSpecificCulture("fr-FR");
if (Single.TryParse(value, style, culture, out number))
Console.WriteLine("Converted '{0}' to {1}.", value, number);
else
Console.WriteLine("Unable to convert '{0}'.", value);
来自msdn:Single.TryParse Method (String, NumberStyles, IFormatProvider, Single%)
或
float usedAmount;
// try parsing with "fr-FR" first
bool success = float.TryParse(inputUsedAmount.Value,
NumberStyles.Float | NumberStyles.AllowThousands,
CultureInfo.GetCultureInfo("fr-FR"),
out usedAmount);
if (!success)
{
// parsing with "fr-FR" failed so try parsing with InvariantCulture
success = float.TryParse(inputUsedAmount.Value,
NumberStyles.Float | NumberStyles.AllowThousands,
CultureInfo.InvariantCulture,
out usedAmount);
}
if (!success)
{
// parsing failed with both "fr-FR" and InvariantCulture
}
关于c# - 使用 Single.TryParse 解析 float 失败,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12165412/