使用 powershell 比较对象问题

Question

寻找比较两个 system.objects 的最佳方法。尝试了 compare-object 选项，似乎没有给出所需的输出..

> $abc
BGP summary information for VRF default
Router identifier 192.168.0.3, local AS number 7251
Neighbor Status Codes: m - Under maintenance
  Neighbor         V  AS           MsgRcvd   MsgSent  InQ OutQ  Up/Down State  PfxRcd PfxAcc
  10.12.103.119    4  7251               0         0    0    0    5d23h Connect
  10.46.252.121    4  7251               0         0    0    0    5d23h Connect

> $def
BGP summary information for VRF default
Router identifier 192.168.0.3, local AS number 7251
Neighbor Status Codes: m - Under maintenance
  Neighbor         V  AS           MsgRcvd   MsgSent  InQ OutQ  Up/Down State  PfxRcd PfxAcc
  10.12.103.119    4  7251               0         0    0    0    5d23h Active
  10.46.252.121    4  7251               0         0    0    0    5d23h Estab 

> $abc.GetType()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     String                                   System.Object

> $def.GetType()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     String                                   System.Object

> Compare-Object -ReferenceObject $abc -DifferenceObject $def

InputObject
-----------
BGP summary information for VRF default...
BGP summary information for VRF default...

Answer 1

您处理的是字符串 ([System.String])，而不是[System.Objects] - 后者只是基本类型，即[System.String] 源自。

比较两个多行字符串的最佳方法是逐行比较它们，为此您必须将它们拆分为一个行数组：

PS> Compare-Object ($abc -split '\r?\n') ($def -split '\r?\n') 

InputObject                                                                     SideIndicator
-----------                                                                     -------------
  10.12.103.119    4  7251               0         0    0    0    5d23h Active  =>           
  10.46.252.121    4  7251               0         0    0    0    5d23h Estab   =>           
  10.12.103.119    4  7251               0         0    0    0    5d23h Connect <=           
  10.46.252.121    4  7251               0         0    0    0    5d23h Connect <=           

=> 行（表示差异的输出对象的.SideIndicator 属性值）表示 RHS 独有的行 ($def) 而 <= 表示 LHS 独有的行 ($abc)