我想使用Powershell 2.0找到文件的父目录。
我从注册表项中找到文件的位置，如下所示：
(get-itemproperty -path "HKLM:\SYSTEM\CurrentControlSet\services\CCUMessageConnectionServer").ImagePath
"O:\Program Files (x86)\CosmoCom\Server Components\Message Connection Server.exe"
我想在此路径上使用split-path来获取父目录。我尝试下面的失败：
PS C:> $a = (get-itemproperty `-path "HKLM:\SYSTEM\CurrentControlSet\services\`CCUMessageConnectionServer").ImagePath
PS C:> split-path $a
Split-Path : Cannot find drive. A drive with the name '"O' does not exist.
At line:1 char:11
+ split-path <<<< $a
+ CategoryInfo : ObjectNotFound: ("O:String) [Split-Path], `DriveNotFoundException`
+ FullyQualifiedErrorId : `DriveNotFound,Microsoft.PowerShell.Commands.SplitPathCommand`
如果我手动分配get-itemproperty返回的文本，如下所示，则分割路径有效
PS C:> $a = "O:\Program Files (x86)\CosmoCom\Server Components\Message Connection Server.exe"
PS C:> split-path $a
O:\Program Files (x86)\CosmoCom\Server Components
PS C:>
我已将$a和get-itemproperty命令传输到get-member，并且两者都返回相同的成员：
TypeName: System.String
Name MemberType Definition
---- ---------- ----------
Clone Method System.Object Clone()
CompareTo Method int CompareTo(System.Object value), int CompareTo(string strB)
Contains Method bool Contains(string value)
CopyTo Method System.Void CopyTo(int sourceIndex, char[] destination, int destinationIndex,...
EndsWith Method bool EndsWith(string value), bool EndsWith(string value, System.StringCompari...
Equals Method bool Equals(System.Object obj), bool Equals(string value), bool Equals(string...
GetEnumerator Method System.CharEnumerator GetEnumerator()
GetHashCode Method int GetHashCode()
GetType Method type GetType()
GetTypeCode Method System.TypeCode GetTypeCode()
IndexOf Method int IndexOf(char value), int IndexOf(char value, int startIndex), int IndexOf...
IndexOfAny Method int IndexOfAny(char[] anyOf), int IndexOfAny(char[] anyOf, int startIndex), i...
Insert Method string Insert(int startIndex, string value)
IsNormalized Method bool IsNormalized(), bool IsNormalized(System.Text.NormalizationForm normaliz...
LastIndexOf Method int LastIndexOf(char value), int LastIndexOf(char value, int startIndex), int...
LastIndexOfAny Method int LastIndexOfAny(char[] anyOf), int LastIndexOfAny(char[] anyOf, int startI...
Normalize Method string Normalize(), string Normalize(System.Text.NormalizationForm normalizat...
PadLeft Method string PadLeft(int totalWidth), string PadLeft(int totalWidth, char paddingChar)
PadRight Method string PadRight(int totalWidth), string PadRight(int totalWidth, char padding...
Remove Method string Remove(int startIndex, int count), string Remove(int startIndex)
Replace Method string Replace(char oldChar, char newChar), string Replace(string oldValue, s...
Split Method string[] Split(Params char[] separator), string[] Split(char[] separator, int...
StartsWith Method bool StartsWith(string value), bool StartsWith(string value, System.StringCom...
Substring Method string Substring(int startIndex), string Substring(int startIndex, int length)
ToCharArray Method char[] ToCharArray(), char[] ToCharArray(int startIndex, int length)
ToLower Method string ToLower(), string ToLower(System.Globalization.CultureInfo culture)
ToLowerInvariant Method string ToLowerInvariant()
ToString Method string ToString(), string ToString(System.IFormatProvider provider)
ToUpper Method string ToUpper(), string ToUpper(System.Globalization.CultureInfo culture)
ToUpperInvariant Method string ToUpperInvariant()
Trim Method string Trim(Params char[] trimChars), string Trim()
TrimEnd Method string TrimEnd(Params char[] trimChars)
TrimStart Method string TrimStart(Params char[] trimChars)
Chars ParameterizedProperty char Chars(int index) {get;}
Length Property System.Int32 Length {get;}