Question

How to remove duplicate letters from string in VB.NET

Answer 1

Imports System
Imports System.Collections.Generic

Public Class Program
	Public Shared Sub Main()
		Dim str As String = "vb.net basic csharp java c c++ php"
		
        Dim hashset = New HashSet(Of Char)(str)
		
        str = String.Join("", hashset)
		
        Console.WriteLine(str)
    End Sub
End Class




' run:
'
' vb.net asichrpj+
'

 

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Answer 2

Imports System

Public Class Program
    Public Shared Sub Main()
        Dim str As String = "vb.net basic csharp java c c++ php"
        Dim tmp As String = String.Empty

        For i As Integer = 0 To str.Length - 1
            If Not tmp.Contains(str(i)) Then
                tmp += str(i)
            End If
        Next

        str = tmp
        Console.WriteLine(str)
    End Sub
End Class





' run:
'
' vb.net asichrpj+
'

 

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Answer 3

Imports System
Imports System.Linq

Public Class Program
	Public Shared Sub Main()
        Dim str As String = "vb.net basic csharp java c c++ php"
		
        Dim uniqueCharArray = str.ToCharArray().Distinct().ToArray()
		
        str = New String(uniqueCharArray)
		
        Console.WriteLine(str)
    End Sub
End Class



' run:
'
' vb.net asichrpj+
'

 

70+ SQL courses for beginners and professionals