ImageList.ImageCollection Classe

  • Référence

Définition

Espace de noms:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Encapsule la collection d’objets Image dans un ImageList.

public: ref class ImageList::ImageCollection sealed : System::Collections::IList
public sealed class ImageList.ImageCollection : System.Collections.IList
type ImageList.ImageCollection = class
    interface IList
    interface ICollection
    interface IEnumerable
Public NotInheritable Class ImageList.ImageCollection
Implements IList
Héritage
Object
ImageList.ImageCollection
Implémente
ICollection IEnumerable IList

Exemples

L’exemple de code suivant montre comment sélectionner, supprimer et afficher des images à partir de la Images propriété de la ImageList classe , qui est un ImageList.ImageCollection type .

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

Remarques

Il est utilisé pour gérer les images dans le ImageList par programmation, en fournissant des méthodes pour ajouter et supprimer des objets image.

Propriétés

Count

Obtient le nombre d'images actuellement dans la liste.
Empty

Obtient une valeur indiquant si ImageList possède des images.
IsReadOnly

Obtient une valeur indiquant si la liste est en lecture seule.
Item[Int32]

Obtient ou définit Image à l'index spécifié dans la collection.
Item[String]

Obtient Image avec la clé spécifiée de la collection.
Keys

Obtient la collection de clés associée aux images dans ImageList.ImageCollection.

Méthodes

Add(Icon)

Ajoute l'icône spécifiée à ImageList.
Add(Image)

Ajoute l'image spécifiée à ImageList.
Add(Image, Color)

Ajoute l'image spécifiée à ImageList, en utilisant la couleur spécifiée pour générer le masque.
Add(String, Icon)

Ajoute une icône avec la clé spécifiée à la fin de la collection.
Add(String, Image)

Ajoute une image avec la clé spécifiée à la fin de la collection.
AddRange(Image[])

Ajoute un tableau d'images à la collection.
AddStrip(Image)

Ajoute une bande d'image pour l'image spécifiée à ImageList.
Clear()

Supprime toutes les images et les masques de ImageList.
Contains(Image)

Non pris en charge. La méthode Contains(Object) indique si un objet spécifié est contenu dans la liste.
ContainsKey(String)

Détermine si la collection contient une image avec la clé spécifiée.
Equals(Object)

Détermine si l'objet spécifié est égal à l'objet actuel.

(Hérité de Object)
GetEnumerator()

Retourne un énumérateur qui peut être utilisé pour itérer au sein de la collection d'éléments.
GetHashCode()

Fait office de fonction de hachage par défaut.

(Hérité de Object)
GetType()

Obtient le Type de l'instance actuelle.

(Hérité de Object)
IndexOf(Image)

Non pris en charge. La méthode IndexOf(Object) retourne l'index d'un objet spécifié dans la liste.
IndexOfKey(String)

Détermine l'index de la première occurrence d'une image avec la clé spécifiée dans la collection.
MemberwiseClone()

Crée une copie superficielle du Object actuel.

(Hérité de Object)
Remove(Image)

Non pris en charge. La méthode Remove(Object) supprime un objet spécifié de la liste.
RemoveAt(Int32)

Supprime une image de la liste.
RemoveByKey(String)

Supprime l'image avec la clé spécifiée de la collection.
SetKeyName(Int32, String)

Définit la clé d'une image de la collection.
ToString()

Retourne une chaîne qui représente l'objet actuel.

(Hérité de Object)

Implémentations d’interfaces explicites

ICollection.CopyTo(Array, Int32)

Copie les éléments de cette collection dans un tableau unidimensionnel compatible, commençant à l'index spécifié du tableau cible.
ICollection.IsSynchronized

Obtient une valeur indiquant si l’accès à la collection est synchronisé (thread-safe).
ICollection.SyncRoot

Obtient un objet qui peut être utilisé pour synchroniser l’accès à la collection.
IList.Add(Object)

Ajoute l'image spécifiée à ImageList.
IList.Contains(Object)

Cette API prend en charge l'infrastructure du produit et n'est pas destinée à être utilisée directement à partir de votre code.

Implémente la méthode Contains(Object). Lève une exception NotSupportedException dans tous les cas.
IList.IndexOf(Object)

Cette API prend en charge l'infrastructure du produit et n'est pas destinée à être utilisée directement à partir de votre code.

Implémente la méthode IndexOf(Object). Lève une exception NotSupportedException dans tous les cas.
IList.Insert(Int32, Object)

Implémente la méthode Insert(Int32, Object). Lève une exception NotSupportedException dans tous les cas.
IList.IsFixedSize

Obtient une valeur indiquant si ImageList.ImageCollection est de taille fixe.
IList.Item[Int32]

Obtient ou définit une image dans une ImageList.ImageCollection existante.
IList.Remove(Object)

Implémente la tâche Remove(Object). Lève une exception NotSupportedException dans tous les cas.

Méthodes d’extension

Cast<TResult>(IEnumerable)

Effectue un cast des éléments d'un IEnumerable vers le type spécifié.
OfType<TResult>(IEnumerable)

Filtre les éléments d'un IEnumerable en fonction du type spécifié.
AsParallel(IEnumerable)

Active la parallélisation d'une requête.
AsQueryable(IEnumerable)

Convertit un IEnumerable en IQueryable.

S’applique à