.net Regex.Replace 不排除插入符

Question

我正在尝试使用 .NET Regex.Replace（VB.NET 中的示例）从字符串中排除所有非字符和空格。例如，在下面的字符串 s 中，我认为模式 [^A-z ] 应该删除除空格之外的所有非字母表。但是，这似乎不起作用。我做错了什么？

Sub Try_Regex_Remove_Caret_Symbol()
' ^ (caret) character is not being removed via exclusion
Dim s As String, p As String
s = "I have a caret which I want removed ^$@#!&"
p = "[^A-z ]"
Console.WriteLine("Input : " & s)
Console.WriteLine("Output: " & Regex.Replace(s, p, ""))
' Input : I have a caret which I want removed ^$@#!&
' Output: I have a caret which I want removed ^
' Note that the caret (^) is not removed as expected
End Sub

Answer 1

这是 ascii table

    0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F

  2     !  "  #  $  %  &  '  (  )  *  +  ,  -  .  /

  3  0  1  2  3  4  5  6  7  8  9  :  ;  <  =  >  ?

  4  @  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O

  5  P  Q  R  S  T  U  V  W  X  Y  Z  [  \  ]  ^  _

  6  `  a  b  c  d  e  f  g  h  i  j  k  l  m  n  o

  7  p  q  r  s  t  u  v  w  x  y  z  {  |  }  ~

您会注意到插入符号 (^) 位于 A 和 z 之间。要获得您想要的效果，您需要：

p = [^A-Za-z ]

Answer 2

使用以下正则表达式进行替换：

[^A-Za-z ]

问题是插入符号在范围 A-Z 和 a-z 之间，因此您将其排除在替换为 [^A-z].

之外

完整代码：

s = "I have a caret which I want removed ^$@#!&"
p = "[^A-Za-z ]"
Console.WriteLine("Input : " & s)
Console.WriteLine("Output: " & Regex.Replace(s, p, ""))

此处演示：

.net Regex.Replace 不排除插入符

.net Regex.Replace not excluding the caret character

.net

regex

vb.net

regex-negation

Rextester