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- TOPIC
- Objects
-
- SHORT DESCRIPTION
- Working with objects in the Windows PowerShell
-
- LONG DESCRIPTION
- Every action you take in PowerShell is done within the context of objects.
- As data moves from one command to the next, it moves as one or more
- identifiable objects. An object, then, is a collection of data that
- represents an item in a namespace. An object is made up of three types
- of data: the object's type, its methods, and its properties.
-
- The data about an object's type provides details about what kind of
- object it is. For example, an object that represents a file is a
- FileInfo object.
-
- An object's method is an action that you can perform on the item that
- the object represents. For instance, a FileInfo object includes a
- method that you can use to cause the file to be copied. That is, when
- you invoke the copy method of the object, the file that the object
- represents is copied.
-
- An object's property is information about the state of that object. For
- example, a FileInfo object includes the length property, which
- specifies the size of the file represented by the object.
-
- When working with objects, you can use their methods and properties in
- your commands to take specific actions and manipulate data. This is
- especially useful when you combine multiple commands into a single
- pipeline.
-
- When commands are combined in a pipeline, they pass information to each
- other as objects. When the first command runs, it sends one or more
- objects down the pipeline to the second command. The second command
- receives the objects from the first command, processes the objects, and
- then passes new or revised objects to the next command in the pipeline.
- This continues until all commands in the pipeline run.
-
- The following example demonstrates how objects are passed from one
- command to the next:
-
- Get-ChildItem c: | where {$_.PsIsContainer -eq $false} |
- Format-List
-
- The first command (Get-ChildItem c:) returns an object for each item in
- the root directory of the file system. Those objects are passed down
- the pipeline to the second command (where {$_.PsIsContainer -eq
- $false}). The second command uses the PsIsContainer property of the
- object to filter the data from the input objects so that no directories
- (containers) are returned. The command then passes the information as
- objects to the third command (Format-List), which displays the contents
- of each piped object in a list format.
-
- SEE ALSO
- For information about namespaces, enter the following command at the
- PowerShell command prompt:
-
- help about_namespace
-
- For information about methods, enter the following command:
-
- help about_method
-
- For information about the properties, enter the following command:
-
- help about_property
-
- For information about pipelines, enter the following command:
-
- help about_pipeline
-
- For information about the Get-Member Cmdlet, enter the following
- command:
-
- help Get-Member
-
-