ImageList.ImageCollection (Clase)
Actualización: noviembre 2007
Espacio de nombres: System.Windows.FormsEnsamblado: System.Windows.Forms (en System.Windows.Forms.dll)
Se utiliza para administrar las imágenes de ImageList mediante programación y proporciona métodos para agregar y quitar objetos de imagen.
El ejemplo de código siguiente muestra cómo seleccionar, quitar y mostrar imágenes de la propiedad Images de la clase ImageList, que es un tipo ImageList.ImageCollection.
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()); } } }
Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile para Smartphone, Windows Mobile para Pocket PC
.NET Framework y .NET Compact Framework no admiten todas las versiones de cada plataforma. Para obtener una lista de las versiones compatibles, vea Requisitos de sistema de .NET Framework.
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