How to get an object s property s value by property name

Question

In PowerShell  how do you get an object s property value by specifying its name  a string   I want something like the following    obj   get-something    View the object s members   obj   gm    I could retrieve a property by doing so  write-host  obj SomeProp    But for many purposes  I would really want to  write-host  obj   Get-PropertyByName  SomeProp    Is there something similar to  Get-PropertyByName  in PowerShell

User · Answer

You can get a property by name using the Select-Object cmdlet and specifying the property name s  that you re interested in  Note that this doesn t simply return the raw value for that property  instead you get something that still behaves like an object    PS  gt   property    Get-Process  0    Select-Object -Property Name   PS  gt   property  Name ---- armsvc   PS  gt   property GetType   FullName System Management Automation PSCustomObject   In order to use the value for that property  you will still need to identify which property you are after  even if there is only one property    PS  gt   property Name armsvc   PS  gt   property -eq  armsvc  False   PS  gt   property Name -eq  armsvc  True   PS  gt   property Name GetType   FullName System String   As per other answers here  if you want to use a single property within a string  you need to evaluate the expression  put brackets around it  and prefix with a dollar sign     to declare the expression dynamically as a variable to be inserted into the string    PS  gt   The first process in the list is     property Name   The first process in the list is  armsvc   Quite correctly  others have answered this question by recommending the -ExpandProperty parameter for the Select-Object cmdlet  This bypasses some of the headache by returning the value of the property specified  but you will want to use different approaches in different scenarios      -ExpandProperty  lt String gt       Specifies a property to select  and indicates that an attempt should   be made to expand that property      https   technet microsoft com en-us library hh849895 aspx    PS  gt   Get-Process  0    Select-Object -ExpandProperty Name armsvc   powershell variables

User · Answer

com1   new-object PSobject                                                          Task1  com2   new-object PSobject                                                          Task1  com3   new-object PSobject                                                          Task1     com1   add-member noteproperty -name user -value jindpal                            Task2  com1   add-member noteproperty -name code -value IT01                               Task2  com1   add-member scriptmethod ver   system Environment   oSVersion Version         Task3    com2   add-member noteproperty -name user -value singh                              Task2  com2   add-member noteproperty -name code -value IT02                               Task2  com2   add-member scriptmethod ver   system Environment   oSVersion Version         Task3    com3   add-member noteproperty -name user -value dhanoa                              Task2  com3   add-member noteproperty -name code -value IT03                                Task2  com3   add-member scriptmethod ver   system Environment   oSVersion Version          Task3    arr     com1   com2   com3                                                           Task4   write-host  windows version of computer1 is    com1 ver                               Task3 write-host  user name of computer1 is    com1 user                                    Task6 write-host  code of computer1 is    com1 code                                         Task5 write-host  windows version of computer2 is    com2 ver                               Task3 write-host  user name of computer2 is    com2 user                                    Task6 write-host  windows version of computer3 is    com3 ver                               Task3 write-host  user name of computer3 is    com1 user                                    Task6 write-host  code of computer3 is    com3 code                                         Task5  read-host

User · Answer

Here is an alternative way to get an object s property value   write-host   get-something  SomeProp

User · Answer

Expanding upon  aquinas   Get-something   select -ExpandProperty PropertyName   or  Get-something   select -expand PropertyName   or  Get-something   select -exp PropertyName   I made these suggestions for those that might just be looking for a single-line command to obtain some piece of information and wanted to include a real-world example   In managing Office 365 via PowerShell  here was an example I used to obtain all of the users groups that had been added to the  BookInPolicy  list   Get-CalendarProcessing conferenceroom domain com   Select -expand BookInPolicy   Just using  Select BookInPolicy  was cutting off several members  so thank you for this information

User · Answer

Try this     obj          SomeProp    Hello     Write-Host  Property Value is    obj  SomeProp

User · Answer

Sure   write-host   obj   Select -ExpandProperty  SomeProp     Or for that matter    obj  SomeProp

[powershell] How to get an object's property's value by property name?

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