fillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertext Hello everyone, I am interested in vb and am confused how to save the contents of a Picturebox as a png file when button1 is clicked .I would be extremely pleased if someone would fix this. Here is the code;
fillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertextfillertext大家好，我对vb感兴趣，并且在点击button1时如何将Picturebox的内容保存为png文件。如果有人能解决这个问题，我会非常高兴。这是代码;
'I got frustrated trying to find a Simple VB.NET freehand drawing code
'So I made my own :)
'*** Acknowlegements ***
'Ideas for this code came from the MicroSoft "Scribble" sample code,
'Christian Graus's excellent arcticle on a C++ code called "Doodle"
'and the MicroSoft website.
'Note that this is a VERY pedantic freehand drawing code, so be kind in you comments. :)
'It uses a graphics path to follow the users mouse movements
'The path is then painted in the window.
'By John Buettner
'26 July 2003
'******************************************************
'This code is for informational purposes
'It is property of the code writer, but may be modified and
'used for any purpose private or commercial, However,
'Users of this code must agree not to copyright or infringe
'upon the original coders rights to this code.
'******************************************************
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Public Class Form
'Namespace myPaint
Inherits System.Windows.Forms.Form ' Of course ;)
Dim mousePath As New System.Drawing.Drawing2D.GraphicsPath() 'declare a new Graphic path to follow the mouse movement
'*** below I declare some values for an Alpha and other user selected variables
'these will be used as I expand this program for a higher level use.
Dim myAlpha As Integer = 100 ' declare a Alpha variable
Dim myUserColor As New Color() 'this is a color the user selects
Friend WithEvents Button1 As Button
Friend WithEvents SaveFileDialog1 As SaveFileDialog
Dim myPenWidth As Single = 5 'set pen width variable
'**************************************************************
#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
'Form 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
Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(Form))
Me.PictureBox1 = New System.Windows.Forms.PictureBox()
Me.Button1 = New System.Windows.Forms.Button()
Me.SaveFileDialog1 = New System.Windows.Forms.SaveFileDialog()
CType(Me.PictureBox1, System.ComponentModel.ISupportInitialize).BeginInit()
Me.SuspendLayout()
'
'PictureBox1
'
Me.PictureBox1.BackColor = System.Drawing.Color.GhostWhite
Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.PictureBox1.Location = New System.Drawing.Point(0, 33)
Me.PictureBox1.Name = "PictureBox1"
Me.PictureBox1.Size = New System.Drawing.Size(696, 423)
Me.PictureBox1.TabIndex = 2
Me.PictureBox1.TabStop = False
'
'Button1
'
Me.Button1.Image = Global.Ubernote.My.Resources.Resources.fl
Me.Button1.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft
Me.Button1.Location = New System.Drawing.Point(12, 4)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(75, 23)
Me.Button1.TabIndex = 3
Me.Button1.Text = "Save"
Me.Button1.UseVisualStyleBackColor = True
'
'SaveFileDialog1
'
'
'Form
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.BackColor = System.Drawing.Color.White
Me.ClientSize = New System.Drawing.Size(696, 456)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.PictureBox1)
Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
Me.Name = "Form"
Me.Text = "Draw"
CType(Me.PictureBox1, System.ComponentModel.ISupportInitialize).EndInit()
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub PictureBox1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) Handles PictureBox1.MouseDown
If e.Button = MouseButtons.Left Then ' draw a filled circle if left mouse is down
mousePath.StartFigure() ' The L mouse is down so we need to start a new line in mousePath
End If
End Sub
Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove
If e.Button = MouseButtons.Left Then ' draw a filled circle if left mouse is down
Try
mousePath.AddLine(e.X, e.Y, e.X, e.Y) 'Add mouse coordiantes to mousePath
Catch
MsgBox("No way, Hose!")
End Try
End If
PictureBox1.Invalidate() 'Repaint the PictureBox using the PictureBox1 Paint event
End Sub
Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
' Here is where we do the actual painting
Try ' error trapping
myUserColor = (System.Drawing.Color.Black) 'You can remove this line and add a user selected color to
'change the value of myUserColor
myAlpha = 100 ' This will give the color a Alpha effect, you can set this to 255 if you want a full color
Dim CurrentPen = New Pen(Color.FromArgb(myAlpha, myUserColor), myPenWidth) 'Set up the pen
e.Graphics.DrawPath(CurrentPen, mousePath) 'draw the path! :)
Catch
End Try
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Try
SaveFileDialog1.ShowDialog()
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
Private Sub SaveFileDialog1_FileOk(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles SaveFileDialog1.FileOk
Try
' Dim FileToSaveAs As String = System.IO.Path.Combine(My.Computer.FileSystem.SpecialDirectories.Temp, SaveFileDialog1.FileName)
' PictureBox1.Image.Save(FileToSaveAs, System.Drawing.Imaging.ImageFormat.Jpeg)
'PictureBox1.Image.Save(FileToSaveAs)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
End Class1 个解决方案
#1
1
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem3.Click
Dim path As String
Dim pic As Image
pic = PictureBox1.Image
SaveFileDialog1.ShowDialog()
pic.Save(SaveFileDialog1.FileName)
End Sub
try this
尝试这个
#1
1
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem3.Click
Dim path As String
Dim pic As Image
pic = PictureBox1.Image
SaveFileDialog1.ShowDialog()
pic.Save(SaveFileDialog1.FileName)
End Sub
try this
尝试这个