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How to create a Dictionary in PowerShell?
To create a dictionary in the PowerShell we need to use the class Dictionary from the .Net namespace System.Collections.Generic. It has TKey and TValue. Its basic syntax is
Dictionary<TKey,TValue>
To learn more about this .Net namespace check the link below.
https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.dictionary-2?view=net-5.0
To create a dictionary we will first create the object for the dictionary object class with the datatypes. In the below example, we need to add the Country name and the country code. So we need String and Int.
$countrydata = New-Object System.Collections.Generic.Dictionary"[String,Int]"
Once we check the type of the $countrydata variable, it should be the dictionary. For example,
Example
PS C:\> $Countrydata.GetType() | ft -AutoSize
Output
IsPublic IsSerial Name BaseType -------- -------- ---- -------- True True Dictionary`2 System.Object
Let’s check which methods are available.
Example
PS C:\> $Countrydata | Get-Member -MemberType Method | Select Name, Membertype
Output
Name MemberType ---- ---------- Add Method Clear Method Contains Method ContainsKey Method ContainsValue Method CopyTo Method EnsureCapacity Method Equals Method GetEnumerator Method GetHashCode Method GetObjectData Method GetType Method OnDeserialization Method Remove Method ToString Method TrimExcess Method TryAdd Method TryGetValue Method
So we can use Add() method to insert the members.
Example
PS C:\> $Countrydata.Add("India",91)
PS C:\> $Countrydata.Add("Algeria",213)Once you check the value, its output should be in the Key-Value pair.
Example
PS C:\> $Countrydata
Output
Key Value --- ----- India 91 Algeria 213
Generally, PowerShell programmers don’t use the directory because of its uncommon syntax and tend to use the Hashtable because can be easily created.
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