Coding4Ever Advanced TextBox

Posted by Kamarudin • December 1, 2010 • 4 minute read • Comments

Project baru kebetulan harus saya kerjakan menggunakan Visual Basic .NET dan untuk menghemat kode-kode yang enggak produktif terutama yang berhubungan dengan proses input (khususnya TextBox) seperti proses enter, validasi huruf/angka, pemisah ribuan, dan perubahan warna objek pada saat focus/lost focus akhirnya saya sempatkan waktu untuk membuat komponen ini.

Jadi dengan menggunakan komponen ini menurut perkiraan saya (berarti masih bisa salah ) bisa menghemat kode yang enggak berguna sampai 10-20 %.

Untuk saat ini fitur tambahannya masih minim sih, tapi…. lumayan lah

Conversion ada 2 pilihan Normal dan UpperCase, jika dipilih UpperCase otomatis input menggunakan huruf besar.
Numeric Only
Letter Only
Thousand Separator/pemisah ribuan, untuk fitur ini masih ada kekurangan yaitu belum mendukung digit decimal.
Auto Enter, agar fitur ini berfungsi dengan baik maka harus diatur terlebih dulu properties TabIndexnya
EnterFocusColor
LeaveFocusColor
SelectionText

Oke kita lihat dulu demonya

klo udah kita masuk ke bagian dalamnya

Imports System.Drawing
Imports System.Windows.Forms

<ToolboxBitmap(GetType(AdvancedTextbox), "AdvancedTextbox.bmp")> _
Public Class AdvancedTextbox
    Inherits System.Windows.Forms.TextBox

#Region ">> Enumerators <<"

    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)> _
    Public Enum EConversion
        Normal = 0
        UpperCase = 1
    End Enum

#End Region

#Region ">> Declarations <<"

    Private mEnterFocusColor As Color = Color.White
    Private mLeaveFocusColor As Color = Color.White

    Private mIsSelectionText As Boolean = False
    Private mIsThousandSeparator As Boolean = False
    Private mIsNumericOnly As Boolean = False
    Private mIsLetterOnly As Boolean = False
    Private mIsAutoEnter As Boolean = False
    Private mIsDecimal As Boolean = False

    Private mConversion As EConversion

#End Region

#Region ">> Properties <<"

    Public Overrides Property MaxLength() As Integer
        Get
            Return MyBase.MaxLength
        End Get

        Set(ByVal value As Integer)
            If Me.mIsThousandSeparator AndAlso value > 15 Then value = 15
            MyBase.MaxLength = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property EnterFocusColor() As Color
        Get
            Return mEnterFocusColor
        End Get

        Set(ByVal value As Color)
            mEnterFocusColor = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property LeaveFocusColor() As Color
        Get
            Return mLeaveFocusColor
        End Get

        Set(ByVal value As Color)
            mLeaveFocusColor = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property SelectionText() As Boolean
        Get
            Return mIsSelectionText
        End Get

        Set(ByVal value As Boolean)
            mIsSelectionText = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property ThousandSeparator() As Boolean
        Get
            Return mIsThousandSeparator
        End Get

        Set(ByVal value As Boolean)
            mIsThousandSeparator = Value

            If mIsThousandSeparator Then
                mIsNumericOnly = True
                Me.MaxLength = 15
                Me.TextAlign = HorizontalAlignment.Right
                Me.Text = "0"
            End If
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property NumericOnly() As Boolean
        Get
            Return mIsNumericOnly
        End Get

        Set(ByVal value As Boolean)
            mIsNumericOnly = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property LetterOnly() As Boolean
        Get
            Return mIsLetterOnly
        End Get

        Set(ByVal value As Boolean)
            mIsLetterOnly = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property AutoEnter() As Boolean
        Get
            Return mIsAutoEnter
        End Get

        Set(ByVal value As Boolean)
            mIsAutoEnter = Value
        End Set
    End Property

    <System.ComponentModel.Category("AdvancedTextbox Properties")> _
    <System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)> _
    Public Property Conversion() As EConversion
        Get
            Return mConversion
        End Get

        Set(ByVal value As EConversion)
            mConversion = Value
        End Set
    End Property

#End Region

#Region ">> Private Function <<"

    Private Function ValidasiAngka(ByVal e As System.Windows.Forms.KeyPressEventArgs) As Boolean
        Dim strValid As String = "0123456789"

        If Not mIsThousandSeparator Then strValid += "."

        If Strings.InStr(strValid, e.KeyChar) = 0 And Not (e.KeyChar = Strings.Chr(Keys.Back)) Then
            Return True ' not valid
        Else
            Return False ' valid
        End If

    End Function ' ValidasiAngka

    Private Function ValidasiHuruf(ByVal e As System.Windows.Forms.KeyPressEventArgs) As Boolean
        Dim strValid As String = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ. "

        If Strings.InStr(strValid, e.KeyChar) = 0 And Not (e.KeyChar = Strings.Chr(Keys.Back)) Then
            Return True ' not valid
        Else
            Return False ' valid
        End If

    End Function ' ValidasiHuruf

    Private Function HurufBesar(ByVal e As System.Windows.Forms.KeyPressEventArgs) As Char
        Return CChar(e.KeyChar.ToString().ToUpper())
    End Function ' HurufBesar

    Private Sub SeleksiText(ByVal sender As System.Windows.Forms.TextBox)
        With sender
            .SelectionStart = 0
            .SelectionLength = .Text.Length
        End With
    End Sub

#End Region

#Region ">> Control Events <<"

    Private Sub AdvancedTextbox_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Enter
        If Me.mIsSelectionText Then Call SeleksiText(CType(sender, System.Windows.Forms.TextBox))
        Me.BackColor = Me.mEnterFocusColor
    End Sub

    Private Sub AdvancedTextbox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
        If Me.mIsAutoEnter Then If e.KeyChar = Strings.Chr(Keys.Return) Then SendKeys.Send ("{Tab}")

        If Me.mIsNumericOnly Then
            If mIsDecimal AndAlso e.KeyChar = "." Then
                e.Handled = True
            Else
                e.Handled = ValidasiAngka(e)
            End If

        ElseIf Me.mIsLetterOnly Then
            If Me.mConversion = EConversion.UpperCase Then e.KeyChar = HurufBesar(e)
            e.Handled = ValidasiHuruf(e)

        ElseIf Me.mConversion = EConversion.UpperCase Then
            e.KeyChar = HurufBesar(e)
        End If
    End Sub

    Private Sub AdvancedTextbox_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Leave
        If Me.mIsNumericOnly Then If Not (Me.Text.Length > 0) Then Me.Text = "0"
        Me.BackColor = Me.mLeaveFocusColor
    End Sub

    Private Sub AdvancedTextbox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.TextChanged

        mIsDecimal = False

        Dim index As Integer = Me.Text.IndexOf(".")
        mIsDecimal = Not (index < 0)

        If Me.mIsNumericOnly AndAlso Me.mIsThousandSeparator Then
            If Me.Text.Length > 0 Then
                If Me.Text.Substring(0, 1) = "." Then Me.Text = Me.Text.Replace(".", "")

                Dim x As Long = CLng(Me.Text.Replace(",", ""))
                Dim strAfterFormat As String = Strings.FormatNumber(x, 0)

                If Me.Text <> strAfterFormat Then
                    Dim pos As Integer = Me.Text.Length - Me.SelectionStart

                    Me.Text = strAfterFormat
                    If ((Me.Text.Length - pos) < 0) Then
                        Me.SelectionStart = 0
                    Else
                        Me.SelectionStart = Me.Text.Length - pos
                    End If
                End If
            End If
        End If
    End Sub

#End Region

End Class

Selamat MENCOBA

Referensi

Extended TextBox Component Class - VB.Net

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Kamarudin

Coding4Ever Advanced TextBox

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