ImageList Klasse
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Stellt Methoden zur Verwaltung einer Auflistung von Image-Objekten bereit. Diese Klasse kann nicht vererbt werden.
public ref class ImageList sealed : System::ComponentModel::Component
[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.ImageListConverter))]
public sealed class ImageList : System.ComponentModel.Component
[<System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.ImageListConverter))>]
type ImageList = class
inherit Component
Public NotInheritable Class ImageList
Inherits Component
- Vererbung
- Attribute
Beispiele
Im folgenden Codebeispiel wird gezeigt, wie Bilder ausgewählt, entfernt und angezeigt werden.
namespace myImageRotator
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
{
using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;
public ref class Form1 : public System::Windows::Forms::Form
{
private:
System::ComponentModel::IContainer^ components;
private:
System::Windows::Forms::ListBox^ listBox1;
private:
System::Windows::Forms::Label^ label3;
private:
System::Windows::Forms::Button^ button1;
private:
System::Windows::Forms::Button^ button2;
private:
System::Windows::Forms::Button^ button3;
private:
System::Windows::Forms::Button^ button4;
private:
System::Windows::Forms::PictureBox^ pictureBox1;
private:
System::Windows::Forms::ImageList^ imageList1;
private:
System::Windows::Forms::OpenFileDialog^ openFileDialog1;
protected:
Graphics^ myGraphics;
private:
System::Windows::Forms::Panel^ panel1;
private:
System::Windows::Forms::Label^ label5;
private:
int currentImage;
public:
Form1()
{
InitializeComponent();
imageList1 = gcnew ImageList () ;
currentImage = 0;
// The default image size is 16 x 16, which sets up a larger
// image size.
imageList1->ImageSize = System::Drawing::Size(255,255);
imageList1->TransparentColor = Color::White;
// Assigns the graphics object to use in the draw options.
myGraphics = Graphics::FromHwnd(panel1->Handle);
}
private:
void InitializeComponent()
{
this->components = gcnew System::ComponentModel::Container();
this->listBox1 = gcnew System::Windows::Forms::ListBox();
this->label3 = gcnew System::Windows::Forms::Label();
this->button1 = gcnew System::Windows::Forms::Button();
this->button2 = gcnew System::Windows::Forms::Button();
this->button3 = gcnew System::Windows::Forms::Button();
this->button4 = gcnew System::Windows::Forms::Button();
this->pictureBox1 = gcnew System::Windows::Forms::PictureBox();
this->imageList1 = gcnew System::Windows::Forms::ImageList(this->components);
this->openFileDialog1 = gcnew System::Windows::Forms::OpenFileDialog();
this->panel1 = gcnew System::Windows::Forms::Panel();
this->label5 = gcnew System::Windows::Forms::Label();
this->SuspendLayout();
this->listBox1->Location = System::Drawing::Point(16, 16);
this->listBox1->Size = System::Drawing::Size(400, 95);
this->listBox1->TabIndex = 0;
this->label3->Location = System::Drawing::Point(24, 168);
this->label3->Text = "label3";
this->button1->Location = System::Drawing::Point(96, 128);
this->button1->Size = System::Drawing::Size(104, 23);
this->button1->Text = "Show Next Image";
this->button1->Click += gcnew System::EventHandler(this,&Form1::button1_Click);
this->button2->Location = System::Drawing::Point(208, 128);
this->button2->Size = System::Drawing::Size(104, 23);
this->button2->Text = "Remove Image";
this->button2->Click += gcnew System::EventHandler(this,&Form1::button2_Click);
this->button3->Location = System::Drawing::Point(320, 128);
this->button3->Text = "Clear List";
this->button3->Click += gcnew System::EventHandler(this,&Form1::button3_Click);
this->button4->Location = System::Drawing::Point(16, 128);
this->button4->Text = "Open Image";
this->button4->Click += gcnew System::EventHandler(this,&Form1::button4_Click);
this->pictureBox1->Location = System::Drawing::Point(328, 232);
this->pictureBox1->Size = System::Drawing::Size(336, 192);
this->imageList1->ImageSize = System::Drawing::Size(16, 16);
this->imageList1->TransparentColor = System::Drawing::Color::Transparent;
this->panel1->Location = System::Drawing::Point(8, 240);
this->panel1->Size = System::Drawing::Size(296, 184);
this->label5->Location = System::Drawing::Point(168, 168);
this->label5->Size = System::Drawing::Size(312, 40);
this->label5->Text = "label5";
this->ClientSize = System::Drawing::Size(672, 461);
this->Controls->Add(this->label5);
this->Controls->Add(this->panel1);
this->Controls->Add(this->pictureBox1);
this->Controls->Add(this->button4);
this->Controls->Add(this->button3);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Controls->Add(this->label3);
this->Controls->Add(this->listBox1);
this->ResumeLayout(false);
}
// Display the image.
private:
void button1_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
if(imageList1->Images->Empty != true)
{
if(imageList1->Images->Count-1 > currentImage)
{
currentImage++;
}
else
{
currentImage=0;
}
panel1->Refresh();
// Draw the image in the panel.
imageList1->Draw(myGraphics,10,10,currentImage);
// Show the image in the PictureBox.
pictureBox1->Image = imageList1->Images[currentImage];
label3->Text = "Current image is " + currentImage ;
listBox1->SelectedIndex = currentImage;
// label5->Text = "Image is " + listBox1->Text ;
label5->Text = String::Concat("Image is ",listBox1->Text);
}
}
// Remove the image.
private:
void button2_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
imageList1->Images->RemoveAt(listBox1->SelectedIndex);
listBox1->Items->Remove(listBox1->SelectedItem);
}
// Clear all images.
private:
void button3_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
imageList1->Images->Clear();
listBox1->Items->Clear();
}
// Find an image.
private:
void button4_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
openFileDialog1->Multiselect = true ;
if(openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK)
{
if (openFileDialog1->FileNames != nullptr)
{
for(int i =0 ; i < openFileDialog1->FileNames->Length ; i++ )
{
addImage(openFileDialog1->FileNames[i]);
}
}
else
addImage(openFileDialog1->FileName);
}
}
private:
void addImage(String^ imageToLoad)
{
if (imageToLoad != "")
{
imageList1->Images->Add(Image::FromFile(imageToLoad));
listBox1->BeginUpdate();
listBox1->Items->Add(imageToLoad);
listBox1->EndUpdate();
}
}
public:
static void Main(array<String^>^ /*args*/)
{
Application::Run(gcnew Form1());
}
};
}
[STAThreadAttribute]
int main(){
myImageRotator::Form1::Main(nullptr);
}
namespace myImageRotator
{
using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;
public class Form1 : System.Windows.Forms.Form
{
private System.ComponentModel.IContainer components;
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.ImageList imageList1;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
protected Graphics myGraphics;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Label label5;
private int currentImage = 0;
public Form1()
{
InitializeComponent();
imageList1 = new ImageList () ;
// The default image size is 16 x 16, which sets up a larger
// image size.
imageList1.ImageSize = new Size(255,255);
imageList1.TransparentColor = Color.White;
// Assigns the graphics object to use in the draw options.
myGraphics = Graphics.FromHwnd(panel1.Handle);
}
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.listBox1 = new System.Windows.Forms.ListBox();
this.label3 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.imageList1 = new System.Windows.Forms.ImageList(this.components);
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.panel1 = new System.Windows.Forms.Panel();
this.label5 = new System.Windows.Forms.Label();
this.SuspendLayout();
this.listBox1.Location = new System.Drawing.Point(16, 16);
this.listBox1.Size = new System.Drawing.Size(400, 95);
this.listBox1.TabIndex = 0;
this.label3.Location = new System.Drawing.Point(24, 168);
this.label3.Text = "label3";
this.button1.Location = new System.Drawing.Point(96, 128);
this.button1.Size = new System.Drawing.Size(104, 23);
this.button1.Text = "Show Next Image";
this.button1.Click += new System.EventHandler(this.button1_Click);
this.button2.Location = new System.Drawing.Point(208, 128);
this.button2.Size = new System.Drawing.Size(104, 23);
this.button2.Text = "Remove Image";
this.button2.Click += new System.EventHandler(this.button2_Click);
this.button3.Location = new System.Drawing.Point(320, 128);
this.button3.Text = "Clear List";
this.button3.Click += new System.EventHandler(this.button3_Click);
this.button4.Location = new System.Drawing.Point(16, 128);
this.button4.Text = "Open Image";
this.button4.Click += new System.EventHandler(this.button4_Click);
this.pictureBox1.Location = new System.Drawing.Point(328, 232);
this.pictureBox1.Size = new System.Drawing.Size(336, 192);
this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
this.panel1.Location = new System.Drawing.Point(8, 240);
this.panel1.Size = new System.Drawing.Size(296, 184);
this.label5.Location = new System.Drawing.Point(168, 168);
this.label5.Size = new System.Drawing.Size(312, 40);
this.label5.Text = "label5";
this.ClientSize = new System.Drawing.Size(672, 461);
this.Controls.Add(this.label5);
this.Controls.Add(this.panel1);
this.Controls.Add(this.pictureBox1);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.label3);
this.Controls.Add(this.listBox1);
this.ResumeLayout(false);
}
// Display the image.
private void button1_Click (object sender, System.EventArgs e)
{
if(imageList1.Images.Empty != true)
{
if(imageList1.Images.Count-1 > currentImage)
{
currentImage++;
}
else
{
currentImage=0;
}
panel1.Refresh();
// Draw the image in the panel.
imageList1.Draw(myGraphics,10,10,currentImage);
// Show the image in the PictureBox.
pictureBox1.Image = imageList1.Images[currentImage];
label3.Text = "Current image is " + currentImage ;
listBox1.SelectedIndex = currentImage;
label5.Text = "Image is " + listBox1.Text ;
}
}
// Remove the image.
private void button2_Click (object sender, System.EventArgs e)
{
imageList1.Images.RemoveAt(listBox1.SelectedIndex);
listBox1.Items.Remove(listBox1.SelectedItem);
}
// Clear all images.
private void button3_Click (object sender, System.EventArgs e)
{
imageList1.Images.Clear();
listBox1.Items.Clear();
}
// Find an image.
private void button4_Click (object sender, System.EventArgs e)
{
openFileDialog1.Multiselect = true ;
if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (openFileDialog1.FileNames != null)
{
for(int i =0 ; i < openFileDialog1.FileNames.Length ; i++ )
{
addImage(openFileDialog1.FileNames[i]);
}
}
else
{
addImage(openFileDialog1.FileName);
}
}
}
private void addImage(string imageToLoad)
{
if (imageToLoad != "")
{
imageList1.Images.Add(Image.FromFile(imageToLoad));
listBox1.BeginUpdate();
listBox1.Items.Add(imageToLoad);
listBox1.EndUpdate();
}
}
[STAThread]
public static void Main(string[] args)
{
Application.Run(new Form1());
}
}
}
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
Private listBox1 As System.Windows.Forms.ListBox
Private label3 As System.Windows.Forms.Label
Private WithEvents button1 As System.Windows.Forms.Button
Private WithEvents button2 As System.Windows.Forms.Button
Private WithEvents button3 As System.Windows.Forms.Button
Private WithEvents button4 As System.Windows.Forms.Button
Private pictureBox1 As System.Windows.Forms.PictureBox
Private imageList1 As System.Windows.Forms.ImageList
Private openFileDialog1 As System.Windows.Forms.OpenFileDialog
Protected myGraphics As Graphics
Private panel1 As System.Windows.Forms.Panel
Private label5 As System.Windows.Forms.Label
Private currentImage As Integer = 0
Public Sub New()
imageList1 = New ImageList()
InitializeComponent()
' The default image size is 16 x 16, which sets up a larger
' image size.
imageList1.ImageSize = New Size(255, 255)
imageList1.TransparentColor = Color.White
' Assigns the graphics object to use in the draw options.
myGraphics = Graphics.FromHwnd(panel1.Handle)
End Sub
Private Sub InitializeComponent()
Me.listBox1 = New System.Windows.Forms.ListBox()
Me.label3 = New System.Windows.Forms.Label()
Me.button1 = New System.Windows.Forms.Button()
Me.button2 = New System.Windows.Forms.Button()
Me.button3 = New System.Windows.Forms.Button()
Me.button4 = New System.Windows.Forms.Button()
Me.pictureBox1 = New System.Windows.Forms.PictureBox()
Me.openFileDialog1 = New System.Windows.Forms.OpenFileDialog()
Me.panel1 = New System.Windows.Forms.Panel()
Me.label5 = New System.Windows.Forms.Label()
Me.SuspendLayout()
Me.listBox1.Location = New System.Drawing.Point(16, 16)
Me.listBox1.Size = New System.Drawing.Size(400, 95)
Me.listBox1.TabIndex = 0
Me.label3.Location = New System.Drawing.Point(24, 168)
Me.label3.Text = "label3"
Me.button1.Location = New System.Drawing.Point(96, 128)
Me.button1.Size = New System.Drawing.Size(104, 23)
Me.button1.Text = "Show Next Image"
Me.button2.Location = New System.Drawing.Point(208, 128)
Me.button2.Size = New System.Drawing.Size(104, 23)
Me.button2.Text = "Remove Image"
Me.button3.Location = New System.Drawing.Point(320, 128)
Me.button3.Text = "Clear List"
Me.button4.Location = New System.Drawing.Point(16, 128)
Me.button4.Text = "Open Image"
Me.pictureBox1.Location = New System.Drawing.Point(328, 232)
Me.pictureBox1.Size = New System.Drawing.Size(336, 192)
Me.imageList1.ImageSize = New System.Drawing.Size(16, 16)
Me.imageList1.TransparentColor = System.Drawing.Color.Transparent
Me.panel1.Location = New System.Drawing.Point(8, 240)
Me.panel1.Size = New System.Drawing.Size(296, 184)
Me.label5.Location = New System.Drawing.Point(168, 168)
Me.label5.Size = New System.Drawing.Size(312, 40)
Me.label5.Text = "label5"
Me.ClientSize = New System.Drawing.Size(672, 461)
Me.Controls.Add(label5)
Me.Controls.Add(panel1)
Me.Controls.Add(pictureBox1)
Me.Controls.Add(button4)
Me.Controls.Add(button3)
Me.Controls.Add(button2)
Me.Controls.Add(button1)
Me.Controls.Add(label3)
Me.Controls.Add(listBox1)
Me.ResumeLayout(False)
End Sub
' Display the image.
Private Sub button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button1.Click
If imageList1.Images.Empty <> True Then
If imageList1.Images.Count - 1 > currentImage Then
currentImage += 1
Else
currentImage = 0
End If
panel1.Refresh()
' Draw the image in the panel.
imageList1.Draw(myGraphics, 10, 10, currentImage)
' Show the image in the PictureBox.
pictureBox1.Image = imageList1.Images(currentImage)
label3.Text = "Current image is " + currentImage.ToString
listBox1.SelectedIndex = currentImage
label5.Text = "Image is " + listBox1.Text
End If
End Sub
' Remove the image.
Private Sub button2_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button2.Click
imageList1.Images.RemoveAt(listBox1.SelectedIndex)
listBox1.Items.Remove(listBox1.SelectedItem)
End Sub
' Clear all images.
Private Sub button3_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button3.Click
imageList1.Images.Clear()
listBox1.Items.Clear()
End Sub
' Find an image.
Private Sub button4_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button4.Click
openFileDialog1.Multiselect = True
If openFileDialog1.ShowDialog() = DialogResult.OK Then
If (openFileDialog1.FileNames IsNot Nothing) Then
Dim i As Integer
For i = 0 To openFileDialog1.FileNames.Length - 1
addImage(openFileDialog1.FileNames(i))
Next i
Else
addImage(openFileDialog1.FileName)
End If
End If
End Sub
Private Sub addImage(ByVal imageToLoad As String)
If imageToLoad <> "" Then
imageList1.Images.Add(Image.FromFile(imageToLoad))
listBox1.BeginUpdate()
listBox1.Items.Add(imageToLoad)
listBox1.EndUpdate()
End If
End Sub
<StaThread()> _
Public Shared Sub Main(ByVal args() As String)
Application.Run(New Form1())
End Sub
End Class
Hinweise
ImageList wird in der Regel von anderen Steuerelementen verwendet, z. B. das ListView, TreeViewoder ToolBar. Sie können Bitmaps oder Symbole dem ImageListHinzufügen von Bitmaps oder Symbolen hinzufügen, und die anderen Steuerelemente können die Bilder wie erforderlich verwenden.
ImageList verwendet einen Handle zum Verwalten der Liste der Bilder. Dies Handle wird erst erstellt, wenn bestimmte Vorgänge, z. B. das Abrufen oder Handle Aufrufen Draw, in der Bildliste ausgeführt werden. Wenn Sie andere Vorgänge ausführen, z. B. das Festlegen oder ColorDepth ImageSize Festlegen des Vorgangs, wird der Handle Vorgang neu erstellt. Daher sollten Sie diese Vorgänge ausführen, bevor Sie Dem ImageList. Darüber hinaus sollten Sie, wenn Sie mit Formularen arbeiten, die lokalisiert werden, immer eine ImageList und Bilder hinzufügen, wenn die Language-Eigenschaft eines Formulars auf "Standard" festgelegt ist. Wenn Sie die Sprache des Formulars ändern, bevor Sie Bilder hinzufügen, werden die Anwendungsressourcendateien beschädigt.
Konstruktoren
ImageList() |
Initialisiert eine neue Instanz der ImageList-Klasse mit Standardwerten für ColorDepth, ImageSize und TransparentColor. |
ImageList(IContainer) |
Initialisiert eine neue Instanz der ImageList-Klasse und ordnet diese einem Container zu. |
Eigenschaften
CanRaiseEvents |
Ruft einen Wert ab, der angibt, ob die Komponente ein Ereignis auslösen kann. (Geerbt von Component) |
ColorDepth |
Ruft die Farbtiefe der Bildliste ab. |
Container |
Ruft die IContainer ab, die in der Component enthalten ist. (Geerbt von Component) |
DesignMode |
Ruft einen Wert ab, der angibt, ob sich Component gegenwärtig im Entwurfsmodus befindet. (Geerbt von Component) |
Events |
Ruft die Liste der Ereignishandler ab, die dieser Component angefügt sind. (Geerbt von Component) |
Handle |
Ruft das Handle des Bildlistenobjekts ab. |
HandleCreated |
Ruft einen Wert ab, der angibt, ob das zugrunde liegende Win32-Handle erstellt wurde. |
Images |
Ruft die ImageList.ImageCollection für diese Bildliste ab. |
ImageSize |
Ruft die Größe der Bilder in der Bildliste ab oder legt diese fest. |
ImageStream |
Ruft den der Bildliste zugeordneten ImageListStreamer ab. |
Site |
Ruft den ISite von Component ab oder legt ihn fest. (Geerbt von Component) |
Tag |
Ruft ein Objekt ab, das zusätzliche Daten über die ImageList enthält, oder legt dieses fest. |
TransparentColor |
Ruft die als transparent zu behandelnde Farbe ab oder legt diese fest. |
Methoden
CreateObjRef(Type) |
Erstellt ein Objekt mit allen relevanten Informationen, die zum Generieren eines Proxys für die Kommunikation mit einem Remoteobjekt erforderlich sind. (Geerbt von MarshalByRefObject) |
Dispose() |
Gibt alle vom Component verwendeten Ressourcen frei. (Geerbt von Component) |
Dispose(Boolean) |
Gibt die von Component verwendeten nicht verwalteten Ressourcen und optional die verwalteten Ressourcen frei. (Geerbt von Component) |
Draw(Graphics, Int32, Int32, Int32) |
Zeichnet das durch den angegebenen Index bestimmte Bild an der angegebenen Position in der festgelegten Graphics. |
Draw(Graphics, Int32, Int32, Int32, Int32, Int32) |
Zeichnet das durch den angegebenen Index festgelegte Bild im angegebenen Graphics an der angegebenen Position und in der angegebenen Größe. |
Draw(Graphics, Point, Int32) |
Zeichnet das durch den angegebenen Index bestimmte Bild an der angegebenen Position in der festgelegten Graphics. |
Equals(Object) |
Bestimmt, ob das angegebene Objekt gleich dem aktuellen Objekt ist. (Geerbt von Object) |
GetHashCode() |
Fungiert als Standardhashfunktion. (Geerbt von Object) |
GetLifetimeService() |
Veraltet.
Ruft das aktuelle Lebensdauerdienstobjekt ab, das die Lebensdauerrichtlinien für diese Instanz steuert. (Geerbt von MarshalByRefObject) |
GetService(Type) |
Gibt ein Objekt zurück, das einen von der Component oder von deren Container bereitgestellten Dienst darstellt. (Geerbt von Component) |
GetType() |
Ruft den Type der aktuellen Instanz ab. (Geerbt von Object) |
InitializeLifetimeService() |
Veraltet.
Ruft ein Lebensdauerdienstobjekt zur Steuerung der Lebensdauerrichtlinie für diese Instanz ab. (Geerbt von MarshalByRefObject) |
MemberwiseClone() |
Erstellt eine flache Kopie des aktuellen Object. (Geerbt von Object) |
MemberwiseClone(Boolean) |
Erstellt eine flache Kopie des aktuellen MarshalByRefObject-Objekts. (Geerbt von MarshalByRefObject) |
ToString() |
Gibt eine Zeichenfolge zurück, die das aktuelle ImageList-Objekt darstellt. |
Ereignisse
Disposed |
Tritt auf, wenn die Komponente von einem Aufruf der Dispose()-Methode verworfen wird. (Geerbt von Component) |
RecreateHandle |
Tritt beim Neuerstellen des Handle ein. |