Konami Code in C#

Question

I am looking to have a C# application implement the Konami Code to display an Easter Egg. http://en.wikipedia.org/wiki/Konami_Code

What is the best way to do this?<

Answer 1

I know it's an old question, but I embarked on this same journey in VB. I created a class for it:

Public Class Konami
    ' Here is the pattern to match
    Property KonamiOrder As List(Of Keys) = New List(Of Keys) From {Keys.Up, Keys.Up, Keys.Down, Keys.Down, Keys.Left, Keys.Right, Keys.Left, Keys.Right, Keys.B, Keys.A}

    ' Just calling these out ahead of time
    Property sequence As List(Of Boolean)
    Property ix As Integer = 0

    ' Hey new object, better set the important bits
    Public Sub New()
        me.reset()
    End Sub

    ' Reset on pattern failure, or completion
    Public Function reset() As Boolean
        Me.sequence = New List(Of Boolean) From {False, False, False, False, False, False, False, False, False, False}
        ix = 0

    End Function


    ' Here's where all the action happens
    Public Function checkKey(keycode As Keys)
        'Check to see what they pressed
        If sequence(ix) = False And keycode = KonamiOrder(ix) Then
            ' Hurray, they pressed the right key, better keep track of it
            sequence(ix) = True
            ix += 1
        Else
            ' Nope, reset
            Me.reset()
        End If

        'Is the code complete and correct?
        If sequence.Contains(False) Then
            ' Nope, send back failure
            Return False
        Else
            'Yep, reset so it can be used again and send back a success
            Me.reset()
            Return True
        End If
    End Function
End Class

This is just a sample form's code behind on the usage of the konami class.

Public Class Form1
    Private oKonami As New Konami

    Private Sub Form1_KeyUp(sender As Object, e As KeyEventArgs) Handles Me.KeyUp
        ' Send the Key press on its way, and get some logic going
        If oKonami.checkKey(e.KeyCode) Then
            ' Congrats, pattern match
            MsgBox("Konami Code Entered")
        End If
    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
        ' This will intercept the key events on this form
        Me.KeyPreview = True
    End Sub
End Class

https://github.com/the1337moderator/KonamiCodeforVB.net