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| Numeric Edit Control - dot net version |
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This message was discovered on microsoft.public.dotnet.languages.vb.
| bob |
Does Msoft include a numeric edit control that allows you
to enter only numeric values similar to Creseant's? Dot
Net doesn't have a masked edit box so you'd have to use
the Active X control but it doesn't work as well as the
Creseants.
Thanks!!
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| Steve |
Here's custom control code I adapted from "Professional VB.NET 2nd Edition"
by Wrox Press. I added properties to set number as positive-only or
integer-only. Create a custom control and build.
Imports System.ComponentModel
' Add your own path to the icon you want on the DLL
<ToolboxBitmap("C:\Documents and Settings\...\Numeric Only TextBox
Development\TextBox.ico")> _
Public Class TextBoxNumeric
Inherits System.Windows.Forms.TextBox
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'UserControl1 overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
components = New System.ComponentModel.Container()
End Sub
#End Region
Dim m_IntegerOnly As Boolean
Dim m_PositiveOnly As Boolean
<Description("If TRUE, only integers can be entered."), _
Browsable(True), _
Category("Validation"), _
DefaultValue(False)> _
Property IntegerOnly() As Boolean
Get
Return m_IntegerOnly
End Get
Set(ByVal Value As Boolean)
m_IntegerOnly = Value
End Set
End Property
<Description("If TRUE, only positive numbers can be entered."), _
Browsable(True), _
Category("Validation"), _
DefaultValue(False)> _
Property PositiveOnly() As Boolean
Get
Return m_PositiveOnly
End Get
Set(ByVal Value As Boolean)
m_PositiveOnly = Value
End Set
End Property
Private Sub NumericTextBox_KeyPress(ByVal sender As Object, ByVal e As
System.Windows.Forms.KeyPressEventArgs) Handles MyBase.KeyPress
Dim KeyAscii As Integer
KeyAscii = Asc(e.KeyChar) ' NOTE: used as a flag when = 0 to mark bad values
Select Case KeyAscii
Case 48 To 57, 8, 13 ' Digits 0 - 9, Backspace, CR.
' These are OK, so accept them.
Case 45 ' Minus sign.
If PositiveOnly Then
KeyAscii = 0
Else
' Number can have only one minus sign, so if
' we already have one, throw this one away.
If InStr(Me.Text, "-") <> 0 Then
KeyAscii = 0
End If
' If the insertion point is not sitting at zero
' (i.e., the beginning of the field), throw away
' the minus sign because it's not valid anywhere
' but the first position
If Me.SelectionStart <> 0 Then
KeyAscii = 0
End If
End If
Case 46 ' Period (decimal point).
If IntegerOnly Then
KeyAscii = 0
Else
' If we already have one period, throw it away
If InStr(Me.Text, ".") <> 0 Then
KeyAscii = 0
End If
End If
Case Else ' Provide no handling for other keys.
KeyAscii = 0
End Select
' If we want to throw the keystroke away, then set the event
' as already handled. Otherwise, let the keystroke be
' handled normally.
If KeyAscii = 0 Then
e.Handled = True
Else
e.Handled = False
End If
End Sub
End Class
"bob" <Click here to reveal e-mail address> wrote in message
news:268101c2445e$6f591980$Click here to reveal e-mail address...
[Original message clipped]
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| bob |
Thanks a bunch!!
[Original message clipped]
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BootFX
Reliable and powerful .NET application framework. |
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