VB.net的IsNumeric视图£为数字？

Console.WriteLine(IsNumeric("$0")) - False

Console.WriteLine(IsNumeric("€0")) - False

Console.WriteLine(IsNumeric("£0")) - True

Console.WriteLine(IsNumeric("£")) - False

对我来说似乎很奇怪,它是什么原因造成的

编辑：也在最后工作：

Console.WriteLine(IsNumeric("300£")) - True

Console.WriteLine(IsNumeric("300£0")) - False

Console.WriteLine(IsNumeric("£300£")) - False

Console.WriteLine(IsNumeric("$0")) ' False
Console.WriteLine(IsNumeric("€0")) ' True
Console.WriteLine(IsNumeric("£0")) ' False
Console.WriteLine(IsNumeric("£"))  ' False

虽然这会让你永远回归真实

using System.Globalization;

Console.WriteLine(MyIsNumeric("$0", NumberStyles.AllowCurrencySymbol, "en-US"))
Console.WriteLine(MyIsNumeric("€0", NumberStyles.AllowCurrencySymbol, "it-IT")) 
Console.WriteLine(MyIsNumeric("£0", NumberStyles.AllowCurrencySymbol, "en-GB")) 


Public Function MyIsNumeric(ByVal val as String, ByVal NumberStyle as NumberStyles, cName as String) as Boolean
    Dim result as Double
    return Double.TryParse(val,NumberStyle, new CultureInfo(cName), result)
 End Function

因此,我们可以得出结论,IsNumeric(最初在VB6运行时中定义)足够智能,可以在解析当前区域设置货币符号(如果它们位于输入字符串之前或之后)时将其排除.