VB.Net/GUI/PictureBox — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
Admin (обсуждение | вклад) м (1 версия) |
(нет различий)
|
Текущая версия на 15:43, 26 мая 2010
Содержание
Create Graphics from Bitmap and paint on a Picture Box
<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms Imports System.Math Public Class MainClass
Shared Sub Main() Dim form1 As Form = New Form1() Application.Run(form1) End Sub
End Class
Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) _ Handles MyBase.Load DrawDiamond() End Sub Private Sub Form1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) _ Handles MyBase.Resize DrawDiamond() End Sub Private Sub DrawDiamond() Dim wid As Integer = picCanvas.ClientSize.Width Dim hgt As Integer = picCanvas.ClientSize.Height " Do nothing if we have no size. " This happens, for example, if the form is minimized. If wid < 1 Or hgt < 1 Then Exit Sub " Make a Bitmap and Graphics to fit. Dim bm As New Bitmap(wid, hgt) Dim gr As Graphics = Graphics.FromImage(bm) Dim bg_brush As New HatchBrush(HatchStyle.HorizontalBrick, _ Color.Blue, Color.Aqua) gr.FillRectangle(bg_brush, picCanvas.ClientRectangle) " Display the result. picCanvas.Image = bm " Free resources. bg_brush.Dispose() gr.Dispose() End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.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() Me.picCanvas = New System.Windows.Forms.PictureBox CType(Me.picCanvas, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " "picCanvas " Me.picCanvas.Dock = System.Windows.Forms.DockStyle.Fill Me.picCanvas.Location = New System.Drawing.Point(0, 0) Me.picCanvas.Name = "picCanvas" Me.picCanvas.Size = New System.Drawing.Size(292, 273) Me.picCanvas.TabIndex = 0 Me.picCanvas.TabStop = False " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(292, 273) Me.Controls.Add(Me.picCanvas) Me.Name = "Form1" Me.Text = "AutoRedraw" CType(Me.picCanvas, System.ruponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub Friend WithEvents picCanvas As System.Windows.Forms.PictureBox
End Class
</source>
Display BMP, Ppeg and Gif Image in PictureBox
<source lang="vbnet"> Imports System.Windows.Forms Imports System.Drawing Imports System.IO
Module Module1
Sub Main() Application.Run(New Form1) End Sub
End Module
Public Class Form1
Inherits System.Windows.Forms.Form
- 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.ruponentModel.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 PictureBox1 As System.Windows.Forms.PictureBox Friend WithEvents Button1 As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.PictureBox1 = New System.Windows.Forms.PictureBox() Me.Button1 = New System.Windows.Forms.Button() Me.SuspendLayout() " "PictureBox1 " Me.PictureBox1.Location = New System.Drawing.Point(32, 24) Me.PictureBox1.Name = "PictureBox1" Me.PictureBox1.Size = New System.Drawing.Size(224, 216) Me.PictureBox1.TabIndex = 0 Me.PictureBox1.TabStop = False " "Button1 " Me.Button1.Location = New System.Drawing.Point(104, 264) Me.Button1.Name = "Button1" Me.Button1.Size = New System.Drawing.Size(80, 23) Me.Button1.TabIndex = 1 Me.Button1.Text = "Start" " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 309) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button1, Me.PictureBox1}) Me.Name = "Form1" Me.Text = "MyPhotos" Me.ResumeLayout(False) End Sub
- End Region
Public ImageFiles() As String Public FileIndex As Integer Public Sub ShowImages() Dim FileDB As New OpenFileDialog() FileDB.Multiselect = True If (FileDB.ShowDialog() = DialogResult.OK) Then ImageFiles = FileDB.FileNames Me.Refresh() If ImageFiles.Length = 0 Then MsgBox("No files selected") Me.Close() Else Dim IsImageFile As Boolean Button1.Text = "End" Dim MyImage As Image FileIndex = 0 Do IsImageFile = False If (UCase(ImageFiles(FileIndex)).EndsWith("JPG")) Then IsImageFile = True End If If (UCase(ImageFiles(FileIndex)).EndsWith("BMP")) Then IsImageFile = True End If If (UCase(ImageFiles(FileIndex)).EndsWith("GIF")) Then IsImageFile = True End If If (IsImageFile) Then Me.Text = ImageFiles(FileIndex) Try MyImage = Image.FromFile(ImageFiles(FileIndex)) PictureBox1.Image = Image.FromFile(ImageFiles(FileIndex)) Display.Sleep(5000) Catch Ex As Exception End Try End If FileIndex = FileIndex + 1 If (FileIndex = ImageFiles.Length) Then FileIndex = 0 End If Loop While (True) End If Else MsgBox("User selected Cancel") Me.Close() End If End Sub Dim Display As System.Threading.Thread Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Dim FileDB As New OpenFileDialog() FileDB.Multiselect = True If (Button1.Text = "End") Then Display.Abort() Me.Close() Else Button1.Text = "End" Display = New System.Threading.Thread(AddressOf ShowImages) Display.Start() End If End Sub
End Class
</source>
Load Image into PictureBox
<source lang="vbnet"> Imports System Imports System.Collections Imports System.Data Imports System.IO Imports System.Xml.Serialization Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Printing
Public Class MainClass
Shared Sub Main() Dim form1 As Form = New Form1() Application.Run(form1) End Sub
End Class
Public Class Form1
Inherits System.Windows.Forms.Form
- 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 Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox "Required by the Windows Form Designer Private components As System.ruponentModel.Container "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() Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1)) Me.PictureBox1 = New System.Windows.Forms.PictureBox() Me.SuspendLayout() " "PictureBox1 " Me.PictureBox1.Location = New System.Drawing.Point(16, 8) Me.PictureBox1.Name = "PictureBox1" Me.PictureBox1.Size = New System.Drawing.Size(264, 200) Me.PictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage Me.PictureBox1.TabIndex = 1 Me.PictureBox1.TabStop = False " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15) Me.ClientSize = New System.Drawing.Size(292, 268) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.PictureBox1}) Me.Name = "Form1" Me.Text = "PictureBox demo" Me.ResumeLayout(False) End Sub
- End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.PictureBox1.Image = New System.Drawing.Bitmap("figure2.bmp") End Sub
End Class
</source>
Paint on a PictureBox
<source lang="vbnet"> Imports System Imports System.Data Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Printing Public Class MainClass
Shared Sub Main() Dim form1 As Form = New Form1 Application.Run(form1) End Sub
End Class
Public Class Form1
Private Sub picCanvas3_Paint(ByVal sender As Object, _ ByVal e As System.Windows.Forms.PaintEventArgs) Handles picCanvas3.Paint e.Graphics.DrawEllipse(Pens.Red, _ picCanvas3.DisplayRectangle.X, _ picCanvas3.DisplayRectangle.Y, _ picCanvas3.DisplayRectangle.Width - 1, _ picCanvas3.DisplayRectangle.Height - 1) End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.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() Me.picCanvas3 = New System.Windows.Forms.PictureBox CType(Me.picCanvas3, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " "picCanvas3 " Me.picCanvas3.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D Me.picCanvas3.Location = New System.Drawing.Point(360, 8) Me.picCanvas3.Name = "picCanvas3" Me.picCanvas3.Size = New System.Drawing.Size(168, 168) Me.picCanvas3.TabIndex = 3 Me.picCanvas3.TabStop = False " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(536, 214) Me.Controls.Add(Me.picCanvas3) Me.Name = "Form1" Me.Text = "UsePictureBox" CType(Me.picCanvas3, System.ruponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub Friend WithEvents picCanvas3 As System.Windows.Forms.PictureBox
End Class
</source>
Using a PictureBox to display images
<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Windows.Forms Public Class MainClass
Shared Sub Main() Dim myform As Form = New FrmPictureBox() Application.Run(myform) End Sub " Main
End Class Public Class FrmPictureBox
Inherits System.Windows.Forms.Form Private imageNumber As Integer = -1
- 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 Friend WithEvents picImage As System.Windows.Forms.Label Friend WithEvents lblPrompt As System.Windows.Forms.Label "Required by the Windows Form Designer Private components As System.ruponentModel.Container "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() Me.picImage = New System.Windows.Forms.Label() Me.lblPrompt = New System.Windows.Forms.Label() Me.SuspendLayout() " "picImage " Me.picImage.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D Me.picImage.Location = New System.Drawing.Point(16, 48) Me.picImage.Name = "picImage" Me.picImage.Size = New System.Drawing.Size(264, 208) Me.picImage.TabIndex = 1 " "lblPrompt " Me.lblPrompt.Location = New System.Drawing.Point(16, 16) Me.lblPrompt.Name = "lblPrompt" Me.lblPrompt.Size = New System.Drawing.Size(264, 23) Me.lblPrompt.TabIndex = 0 Me.lblPrompt.Text = "Click On PictureBox to View Images" " "FrmPictureBox " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 273) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.picImage, Me.lblPrompt}) Me.Name = "FrmPictureBox" Me.Text = "PictureBoxTest" Me.ResumeLayout(False) End Sub
- End Region
" replace image in picImage Private Sub picImage_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles picImage.Click " create Image object from file, display in PictureBox picImage.Image = Image.FromFile("figure2.bmp") End Sub
End Class
</source>