Windows Powershell 变量的类型和强类型

PS> (10).gettype().name
Int32
PS> (9999999999999999).gettype().name
Int64
PS> (3.14).gettype().name
Double
PS> (3.14d).gettype().name
Decimal
PS> ("WWW.MOSSFLY.COM").gettype().name
String
PS> (Get-Date).gettype().name
DateTimePowershell

PS> [byte]$b=101
PS> $b
101
PS> $b=255
PS> $b
255
PS> $b.gettype()

IsPublic IsSerial Name                   BaseType
-------- -------- ----                   --------
True   True   Byte                   System.ValueType

PS> $b=256

Cannot convert value "256" to type "System.Byte". Error: "Value was either too large or too small for an unsigned byte.
"
At line:1 char:3
+ $b <<<< =256
  + CategoryInfo     : MetadataError: (:) [], ArgumentTransformationMetadataException
  + FullyQualifiedErrorId : RuntimeException

PS> [DateTime]$date="2012-12-20 12:45:00"
PS> $date

2012年12月20日 12:45:00

PS> $date.DayOfWeek
Thursday
PS> $date.DayOfYear
355
PS> $date.AddDays(-10)

2012年12月10日 12:45:00Powershell

  
 <LOGOTEST> 
 <EXTENSIONS> 
  <E>.exe</E> 
  <E>.dll</E> 
 </EXTENSIONS> 
 <FILES> 
  <F></F> 
 </FILES> 
 <DIRS></DIRS> 
</LOGOTEST>

PS> [ XML ]$xml=(Get-Content .LogoTestConfig.xml)
PS> $xml.LogoTest.Extensions.E
.exe
.dllPowershell 

[array],[bool],[byte],[char],[datetime],[decimal],[double],[guid],[hashtable],[int16],[int32],[int],[int64],[long],[nullable],[psobject],[regex],[sbyte].[scriptblock],[single],[float],[string],[switch],[timespan],[type],[uint16],[uint32],[uint64],[ XML ]