[RESOLVED] [2008] 1 to 9 digits only textbox

Hi!!

I'm creating a Sudoku Solver and as you know in a Sudoku you can only enter the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9. So in the textboxes of my program I have to limit the user input to these numbers. I went looking for a code for this in the forum and found this one from .paul.. This code is very good except that it also accepts the number 0. So I made my own:

Code:

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    Private Sub Textbox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Textbox1.TextChanged
        Select Case e.KeyValue
            Case Keys.Back, Keys.Delete, Keys.Left, Keys.Right, Keys.Home, Keys.End
            Case Keys.D1 To Keys.D9, Keys.NumPad1 To Keys.NumPad9
                If e.Modifiers <> 0 Then
                    e.SuppressKeyPress = True
                    e.Handled = False
                End If
            Case Else
                e.SuppressKeyPress = True
                e.Handled = False
        End Select
    End Sub

---

Everything works fine, from the exception that if I press Alt+0111 (or any other combination) I still get charater in the textbox (in this case an "o").
What is making me go crazy is that with If e.Modifiers <> 0 Then this input should be suppressed. How can I overcome this?

Thks a lot for the help!

try this:

vb Code:

Public Class intTextbox
 
    Inherits TextBox
 
    Const WM_PASTE As Integer = &H302
 
    Protected Overrides Sub OnKeyPress(ByVal e As System.Windows.Forms.KeyPressEventArgs)
        e.Handled = Not (Char.IsControl(e.KeyChar) OrElse Char.IsDigit(e.KeyChar) And e.KeyChar <> "0"c)
        MyBase.OnKeyPress(e)
    End Sub
 
    Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
        If m.Msg = WM_PASTE Then
            Dim strText As String = Me.Text
            strText = strText.Remove(Me.SelectionStart, Me.SelectionLength)
            strText = strText.Insert(Me.SelectionStart, Clipboard.GetText)
            Dim result As Integer = 0
            If Not (Integer.TryParse(strText, result) And (result >= 1) And result.ToString.Length = Clipboard.GetText.Length) Then
                Return
            End If
        End If
        MyBase.WndProc(m)
    End Sub
 
End Class

Thks a lot paul. Just be curiosity would this could also work with a richtextbox instead?

For my Sudoku game, I use button's for the cells. If you're interested, I can send you the button class and whatnot

If you use buttons how can the user input numbers?

Easily, capture the key pressed in the button's keypress event

I also used a button because you have the ability to draw the tiny available numbers on each button (which I've provided a menu item to turn that on and off) plus by using a button I've got it so when the user presses the up, down, left, or right arrow keys, focus moves automatically to the next button on the grid

If you're interested in trying it out, the exe is available on my website: http:/www.Juggalobrotha.com/games.html

I can give ya the code for the buttons later on if you're interested

could you post the code for the buttons?

Nice program JuggaloBrotha. The code for the buttons would be nice.

I had to strip some of the stuff out of it, you guys should be able to implement it pretty easily into your own program(s)

Code:

---

'Loop to initialize things:
        For x As Integer = 0I To 8I
            For y As Integer = 0I To 8I
                p = New CellButton(x, y)
                p.Location = New Point() 'Set the location here
                p.Size = New Size() 'Set the size here
                p.Font = Me.Font
                Me.Controls.Add(p)
                m_Cells(x, y) = p
                AddHandler p.KeyPressed, AddressOf CellsKeyPressed
            Next y
        Next x

'Here's the KeyPress event:
    Private Sub CellsKeyPressed(ByVal c As CellButton, ByVal k As CellButton.CellKey)
        Dim x As Integer = c.x
        Dim y As Integer = c.y
        Select Case k
            Case CellButton.CellKey.KeyLeft
                x -= 1
                If x < 0 Then x += 8
                StatusToolStripLabel.Text = String.Empty
            Case CellButton.CellKey.KeyRight
                x += 1
                If x >= m_ArrayTopIndex + 1 Then x -= 8
                StatusToolStripLabel.Text = String.Empty
            Case CellButton.CellKey.KeyUp
                y -= 1
                If y < 0 Then y += 8
                StatusToolStripLabel.Text = String.Empty
            Case CellButton.CellKey.KeyDown
                y += 1
                If y >= m_ArrayTopIndex + 1 Then y -= 8
                StatusToolStripLabel.Text = String.Empty
            Case CellButton.CellKey.Key1 To CellButton.CellKey.Key9
                Dim fv As Integer = k - CellButton.CellKey.KeyDelete
                If fv <> c.forcedVal Then
                    Dim AllowedNumbers As New List(Of Integer)
                    AllowedNumbers.AddRange(GetNumbersLeft(x, y))
                    If AllowedNumbers.Contains(fv) = True Then
                        'Update your board
                        c.SetForcedVal(fv, False, GetNumbersLeft(x, y))
                    End If
                End If
            Case CellButton.CellKey.KeyDelete
                If c.forcedVal <> 0 Then
                      'Update your board
                    c.SetForcedVal(0, False, GetNumbersLeft(x, y))
                End If
            Case Else
        End Select
    End Sub

'Here's the CellButton class that inherits from a Button:
Option Explicit On
Option Strict On

<System.Diagnostics.DebuggerStepThrough()> _
Friend Class CellButton
    Inherits System.Windows.Forms.Button

    Friend Enum CellKey
        KeyDelete = 0I
        Key1 = 1I
        Key2 = 2I
        Key3 = 3I
        Key4 = 4I
        Key5 = 5I
        Key6 = 6I
        Key7 = 7I
        Key8 = 8I
        Key9 = 9I
        KeyUp = 10I
        KeyDown = 11I
        KeyLeft = 12I
        KeyRight = 13I
    End Enum

    Friend ReadOnly x As Integer
    Friend ReadOnly y As Integer
    Friend forcedVal As Integer
    Private v As Integer
    Private m_NumberCanChangeBoolean As Boolean
    Private m_AvailNumbers As New List(Of Integer)
    Private solValues As Integer
    Private m_ShowAvailNumbs As Boolean

    Friend Sub New(ByVal x As Integer, ByVal y As Integer)
        Me.x = x
        Me.y = y
    End Sub

    Protected Overrides Function ProcessDialogKey(ByVal keyData As System.Windows.Forms.Keys) As Boolean
        Select Case keyData
            Case Keys.Up
                RaiseEvent KeyPressed(Me, CellKey.KeyUp)
                Return True
            Case Keys.Down
                RaiseEvent KeyPressed(Me, CellKey.KeyDown)
                Return True
            Case Keys.Left
                RaiseEvent KeyPressed(Me, CellKey.KeyLeft)
                Return True
            Case Keys.Right
                RaiseEvent KeyPressed(Me, CellKey.KeyRight)
                Return True
            Case Keys.Delete
                RaiseEvent KeyPressed(Me, CellKey.KeyDelete)
                Return True
            Case Else
                Return MyBase.ProcessDialogKey(keyData)
        End Select
    End Function

    Protected Overrides Function ProcessDialogChar(ByVal charCode As Char) As Boolean
        If m_NumberCanChangeBoolean = True Then
            Dim k As CellKey = CellKey.Key1
            Select Case charCode
                Case "1"c : k = CellKey.Key1
                Case "2"c : k = CellKey.Key2
                Case "3"c : k = CellKey.Key3
                Case "4"c : k = CellKey.Key4
                Case "5"c : k = CellKey.Key5
                Case "6"c : k = CellKey.Key6
                Case "7"c : k = CellKey.Key7
                Case "8"c : k = CellKey.Key8
                Case "9"c : k = CellKey.Key9
                Case "0"c, "."c, " "c : k = CellKey.KeyDelete
                Case Else
                    Return False
            End Select
            RaiseEvent KeyPressed(Me, k)
            Return True
        Else
            Return False
        End If
    End Function

    Friend Event KeyPressed(ByVal sender As CellButton, ByVal key As CellKey)

    Friend Sub SetForcedVal(ByVal v As Integer, ByVal PreSetBoard As Boolean, ByVal AvailableNumbers() As Integer)
        forcedVal = v
        Me.m_AvailNumbers.Clear()
        Me.m_AvailNumbers.AddRange(AvailableNumbers)
        If PreSetBoard = True Then
            ForeColor = Color.Black
            Me.v = v
            Me.solValues = 1I << (v - 1I)
        Else
            If v > 0 Then
                ForeColor = Color.Gray
                Me.v = v
                Me.solValues = 1I << (v - 1I)
            Else
                ForeColor = Color.Black
                Me.solValues = 0I
                Me.v = 0I
            End If
        End If
        Me.Refresh()
    End Sub

    Private Shared bigfont As New Font("Microsoft Sans Serif", 20.0F, FontStyle.Bold)

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        MyBase.OnPaint(e)
        Dim ExitSub As Boolean = False
        Dim TopValue As Integer = 0I
        For i As Integer = 1I To TopValue
            Dim vi As Integer = 1I << (i - 1I)
            If Me.solValues = vi Then
                e.Graphics.DrawString(CStr(i), bigfont, New SolidBrush(Me.ForeColor), 5.0F, 4.0F)
                ExitSub = True
            End If
        Next i
        If ExitSub = False AndAlso m_ShowAvailNumbs = True Then
            If m_AvailNumbers.Count > 0I Then
                For Numb As Integer = 0I To m_AvailNumbers.Count - 1I
                    Select Case m_AvailNumbers(Numb)
                        Case 1 : e.Graphics.DrawString("1", Me.Font, New SolidBrush(Me.ForeColor), 2.0F, 0.0F)
                        Case 2 : e.Graphics.DrawString("2", Me.Font, New SolidBrush(Me.ForeColor), 12.0F, 0.0F)
                        Case 3 : e.Graphics.DrawString("3", Me.Font, New SolidBrush(Me.ForeColor), 22.0F, 0.0F)
                        Case 4 : e.Graphics.DrawString("4", Me.Font, New SolidBrush(Me.ForeColor), 2.0F, 11.0F)
                        Case 5 : e.Graphics.DrawString("5", Me.Font, New SolidBrush(Me.ForeColor), 12.0F, 11.0F)
                        Case 6 : e.Graphics.DrawString("6", Me.Font, New SolidBrush(Me.ForeColor), 22.0F, 11.0F)
                        Case 7 : e.Graphics.DrawString("7", Me.Font, New SolidBrush(Me.ForeColor), 2.0F, 22.0F)
                        Case 8 : e.Graphics.DrawString("8", Me.Font, New SolidBrush(Me.ForeColor), 12.0F, 22.0F)
                        Case 9 : e.Graphics.DrawString("9", Me.Font, New SolidBrush(Me.ForeColor), 22.0F, 22.0F)
                    End Select
                Next Numb
            End If
        End If
    End Sub

    Friend Sub OtherCellChanged(ByVal AvailableNumbers() As Integer)
        Me.m_AvailNumbers.Clear()
        Me.m_AvailNumbers.AddRange(AvailableNumbers)
        Me.Refresh()
    End Sub

    Friend Property NumberCanChange() As Boolean
        Get
            Return m_NumberCanChangeBoolean
        End Get
        Set(ByVal value As Boolean)
            m_NumberCanChangeBoolean = value
        End Set
    End Property

    Friend Property ShowAvailableNumbers() As Boolean
        Get
            Return m_ShowAvailNumbs
        End Get
        Set(ByVal value As Boolean)
            m_ShowAvailNumbs = value
            Me.Refresh()
        End Set
    End Property
End Class

---

You'll need to make a GetNumbersLeft() function that returns an integer array.
I'm sure there's a couple of other things that's not quite right in here.

Ok, I had a few minutes to pull out the use of the button code and put it into an example.

You could create a user control like this

Code:

---

Imports System.Object
Imports System.Windows.Forms
Public Class testClass 
  Inherits TextBox
    Private Const WM_RBUTTONUP As Long = &H205 
  Public Const WM_COPY = &H301 
 Public Const WM_Paste = &H302 
 Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message) 
      If m.Msg = WM_COPY Then 
        MessageBox.Show("Cannot copy") 
        Return 
      End If
        If m.Msg = WM_RBUTTONUP Then 
          Return
      End If 
      If m.Msg = WM_Paste Then 
        Return 
    End If 
      MyBase.WndProc(m)
  End Sub
  Protected Overrides Sub OnKeyPress(ByVal e As System.Windows.Forms.KeyPressEventArgs) 
      MyBase.OnKeyPress(e)
        If Not (Char.IsNumber(e.KeyChar)) Then 
        MessageBox.Show("Not number") 
        e.Handled = True 
    End If 
  End Sub
End Class

---

And you need to modify this part

Code:

---

Protected Overrides Sub OnKeyPress(ByVal e As System.Windows.Forms.KeyPressEventArgs) 
      MyBase.OnKeyPress(e)
        If Not (Char.IsNumber(e.KeyChar)) Then 
        MessageBox.Show("Not number") 
        e.Handled = True 
    Else
        'Validate Here
    End If 
  End Sub

---