Question

How to convert a hashtable keys to string array in VB.NET

Answer 1

Imports System
Imports System.Collections

Module HashTableToString
    Sub Main()
        Dim ht As New Hashtable()

        ht.Add("A", "C")
        ht.Add("B", "Java")
        ht.Add("C", "Python")
        ht.Add("D", "Go")
        ht.Add("E", "Rust")
        ht.Add("F", "TypeScript")

        Dim keysArray(ht.Keys.Count - 1) As String

        ht.Keys.CopyTo(keysArray, 0)

        Console.WriteLine("Keys as String Array:")
        For Each key As String In keysArray
            Console.WriteLine(key)
        Next
    End Sub
End Module


	
' run:
'
' Keys as String Array:
' A
' D
' F
' B
' E
' C
' 

 

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Answer 2

Imports System
Imports System.Linq
Imports System.Collections

Module HashTableToString
    Sub Main()
        Dim ht As New Hashtable()

        ht.Add("A", "C")
        ht.Add("B", "Java")
        ht.Add("C", "Python")
        ht.Add("D", "Go")
        ht.Add("E", "Rust")
        ht.Add("F", "TypeScript")

        Dim keysArray As String() = ht.Keys.Cast(Of String)().ToArray()
        
		Console.WriteLine("Keys as String Array:")
        For Each key As String In keysArray
            Console.WriteLine(key)
        Next
    End Sub
End Module


	
' run:
'
' Keys as String Array:
' A
' D
' F
' B
' E
' C
' 

 

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