Sig Capture => Save & reload image

D

dgdolins1

New member
Joined
Sep 29, 2003
Messages
3
Hello,

Im attempting to write a signature capture control that will store and reload an image. If its not too much trouble, could someone please take a look at my SaveSigAsImage and OpenSigImage routine and hint on why they do not work.

Thank you.

Code: 
Public Class Signature
    Inherits System.Windows.Forms.UserControl

    Public OldX As Integer
    Public OldY As Integer
    Public pen As New Drawing.Pen(System.Drawing.Color.Black, 1)
    Public bolStartSign As Boolean
    Public bolMouseUp As Boolean = True
    Dim aWidth As Integer = 500
    Dim aHeight As Integer = 500
    Dim aBgColor As Drawing.Color = Drawing.Color.White
    Dim b As New Drawing.Bitmap(aWidth, aHeight)
    Dim g As Drawing.Graphics = Drawing.Graphics.FromImage(b)
#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

    UserControl 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.
    Friend WithEvents picSig As System.Windows.Forms.PictureBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.picSig = New System.Windows.Forms.PictureBox
        Me.SuspendLayout()
        
        picSig
        
        Me.picSig.BackColor = System.Drawing.Color.White
        Me.picSig.Location = New System.Drawing.Point(16, 8)
        Me.picSig.Name = "picSig"
        Me.picSig.Size = New System.Drawing.Size(304, 192)
        Me.picSig.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
        Me.picSig.TabIndex = 0
        Me.picSig.TabStop = False
        
        Signature
        
        Me.Controls.Add(Me.picSig)
        Me.Name = "Signature"
        Me.Size = New System.Drawing.Size(416, 304)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub UserControl1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        picSig.Top = 0
        picSig.Left = 0
        picSig.Width = Me.Width
        picSig.Height = Me.Height
        g.Clear(aBgColor)
        g.SmoothingMode = Drawing.Drawing2D.SmoothingMode.AntiAlias
    End Sub

    Private Sub Signature_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Resize
        picSig.Width = Me.Width
        picSig.Height = Me.Height
    End Sub

    Private Sub picSig_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles picSig.MouseMove
        If Not bolMouseUp Then need to show the image the sametime creating it
            picSig.CreateGraphics.DrawLine(pen, OldX, OldY, e.X, e.Y)
            g.DrawLine(pen, OldX, OldY, e.X, e.Y)
            OldX = e.X
            OldY = e.Y
        End If
    End Sub

    Private Sub picSig_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles picSig.MouseUp
        bolMouseUp = True
    End Sub

    Private Sub picSig_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles picSig.MouseDown
        bolMouseUp = False
        OldX = e.X
        OldY = e.Y
    End Sub

    Public Sub SaveSigAsImage(ByVal Path As String)
        Dim i As Image = picSig.Image
        i.Save(Path, Drawing.Imaging.ImageFormat.Bmp)
    End Sub

    Public Sub OpenSigImage(ByVal Path As String)
        Dim img As Image = Image.FromFile(Path)
        picSig.Image = img
        b = img
    End Sub
    Public Sub ClearSignature()
        picSig.Refresh()
    End Sub

    Private Sub picSig_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles picSig.Paint
        e.Graphics.DrawImage(b, 0, 0)
    End Sub
End Class
 
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