Windows PowerShell Object = attribute + method _powershell

In the real world, you may already know that objects are things that you can touch. The objects in PowerShell are similar to real life. For example, to describe a knife in real life. We might be able to describe it in two ways.
Property : A knife has some special properties, such as its color, manufacturer, size, number of blades. The object is red, weighs 55 grams, has 3 blades, produced by ABC Company. So the property describes what an object is.
method : You can use this object to do something, such as cutting things, when the screws with, open beer lid. A method in which an object is capable of being part of this object.

Creating objects

You can create an object by New-object, or even create a virtual knife, but the first step is to create an empty object. A null object has nothing, and if it is invoked, it does not return anything.

Copy Code code as follows:

PS c:powershell> $pocketknife =new-object Object
PS c:powershell> $pocketknife
System.Object

Add Properties

Next, describe what this object is.

Copy Code code as follows:

PS c:powershell> add-member-inputobject $pocketknife-name color-value "Red"
-membertype Noteproperty
PS c:powershell> $pocketknife

Color
-----
Red

PS c:powershell> add-member-inputobject $pocketknife-name weight-value "55"
-membertype Noteproperty
PS c:powershell> $pocketknife | Add-member Noteproperty Blades 3
PS c:powershell> $pocketknife | Add-member Noteproperty manufacturer ABC
PS c:powershell> $pocketknife

Color Weight Blades Manufacturer
----- ------ ------ ------------
Red 3 ABC

Add Method

When you add attributes to an object, the object has a shape, but it still doesn't do anything, and if you want to do something, you have to add a way to it. Use the same add-member, but the-membertype option uses Scriptmethod.

Copy Code code as follows:

# Add a new method:
Add-member-membertype scriptmethod-in $pocketknife '
-name cut-value {"I ' m whittling Now"}
# Add a new method for specifying the parameter type:
Add-member-in $pocketknife scriptmethod Screw {"phew...it ' in!"}
#直接通过管道增加一个新方法:
$pocketknife | Add-member Scriptmethod Corkscrew {"pop! Cheers! "}

Method has been successfully added, you can call the

Copy Code code as follows:

PS c:powershell> $pocketknife. Cut ()
I ' M whittling now
PS c:powershell> $pocketknife. Screw ()
Phew...it ' s in!
PS c:powershell> $pocketknife. Corkscrew ()
pop! cheers!

If you do not use parentheses when calling a method, the method does not execute, but you can return the basic information for the method.

Copy Code code as follows:

PS c:powershell> $pocketknife. Corkscrew

Script: "pop! Cheers! "
Overloaddefinitions: {System.Object corkscrew ();}
Membertype:scriptmethod
TypeNameOfValue:System.Object
Value:System.Object Corkscrew ();
Name:corkscrew
Isinstance:true

So far a virtual knife object has been created, and an object contains data (attributes) and actions (methods).