我正在进行字符比较，不知道为什么这不起作用。我尝试了下面列出的不同选项，并尝试了退格附近的连字符和数字键盘上的连字符。我试图将它转换为其字符字节值，但失败了。我已经将"-"强制转换为char变量，但它仍然失败？
解决方案是什么？
[DBG]: PS C:> $line.GetType()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True String System.Object
[DBG]: PS C:> $line[$i]
–
[DBG]: PS C:> $line[$i] -eq "-"
False
[DBG]: PS C:> $line[$i] -eq "-"
False
[DBG]: PS C:> [byte[]][char[]]"-"
45
[DBG]: PS C:> [byte[]][char[]]$line[$i]
Cannot convert value "–" to type "System.Byte". Error: "Value was either too large or too small for an unsigned byte."
At line:1 char:1
+ [byte[]][char[]]$line[$i]
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvalidCastIConvertible
[DBG]: PS C:> $line[$i] -eq "-"
False
[DBG]: PS C:> $line[$i] -eq "`-"
False
[DBG]: PS C:> $line[$i] -eq '-'
False
[DBG]: PS C:> $line[$i] -eq '`-'
False
[DBG]: PS C:> $line[$i] -like '-'
False
[DBG]: PS C:> $line[$i] -like "-"
False
[DBG]: PS C:> $line[$i] -match '-'
False
[DBG]: PS C:> $line[$i] -match "-"
False
[DBG]: PS C:> $line[$i].GetType()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True Char System.ValueType
[DBG]: PS C:> $line[$i] | gm
TypeName: System.Char
Name MemberType Definition
---- ---------- ----------
CompareTo Method int CompareTo(System.Object value), int CompareTo(char value), int IComparable.CompareTo(System.Object obj), int IComparable[char].CompareTo(char other)
Equals Method bool Equals(System.Object obj), bool Equals(char obj), bool IEquatable[char].Equals(char other)
GetHashCode Method int GetHashCode()
GetType Method type GetType()
GetTypeCode Method System.TypeCode GetTypeCode(), System.TypeCode IConvertible.GetTypeCode()
ToBoolean Method bool IConvertible.ToBoolean(System.IFormatProvider provider)
ToByte Method byte IConvertible.ToByte(System.IFormatProvider provider)
ToChar Method char IConvertible.ToChar(System.IFormatProvider provider)
ToDateTime Method datetime IConvertible.ToDateTime(System.IFormatProvider provider)
ToDecimal Method decimal IConvertible.ToDecimal(System.IFormatProvider provider)
ToDouble Method double IConvertible.ToDouble(System.IFormatProvider provider)
ToInt16 Method int16 IConvertible.ToInt16(System.IFormatProvider provider)
ToInt32 Method int IConvertible.ToInt32(System.IFormatProvider provider)
ToInt64 Method long IConvertible.ToInt64(System.IFormatProvider provider)
ToSByte Method sbyte IConvertible.ToSByte(System.IFormatProvider provider)
ToSingle Method float IConvertible.ToSingle(System.IFormatProvider provider)
ToString Method string ToString(), string ToString(System.IFormatProvider provider), string IConvertible.ToString(System.IFormatProvider provider)
ToType Method System.Object IConvertible.ToType(type conversionType, System.IFormatProvider provider)
ToUInt16 Method uint16 IConvertible.ToUInt16(System.IFormatProvider provider)
ToUInt32 Method uint32 IConvertible.ToUInt32(System.IFormatProvider provider)
ToUInt64 Method uint64 IConvertible.ToUInt64(System.IFormatProvider provider)
[DBG]: PS C:> [char]$ch = '-'
[DBG]: PS C:> $ch.GetType()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True Char System.ValueType
[DBG]: PS C:> $line[$i] -eq $ch
False
如果这在搜索中出现并对某人有帮助，请尝试下面的比较
[DBG]: PS C:> [char] 0x2014
—
[DBG]: PS C:> [char] 0x2013
–
[DBG]: PS C:> $line[$i] -eq ([char] 0x2014) # em-dash
False
[DBG]: PS C:> $line[$i] -eq ([char] 0x2013) # en-dash
True
识别unicode字符的新脚本：
# idChar.ps1
param($inputChar)
if (! (test-path $psscriptrootUnicodeData.txt)) {
wget http://www.unicode.org/Public/UNIDATA/UnicodeData.txt -outfile UnicodeData.txt }
$unicode = import-csv $psscriptrootUnicodeData.txt -Delimiter ';' -Header code,name
$unicode | ? { $inputChar[0] -eq [int]('0x' + $_.code) }
.idChar –
code name
---- ----
2013 EN DASH
.idChar —
code name
---- ----
2014 EM DASH
.idChar -
code name
---- ----
002D HYPHEN-MINUS
此外，还有一个用于破折号的regex-unicode类：
'-','—','–' | select-string 'p{Pd}'
-
—
–