Csharp/CSharp Tutorial/GUI Windows Forms/ImageList

Add Image in an ImageList to a Button

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; using System.Collections; public class ImageLists : Form {

 ImageList imgList;
 Label lbl;
 LinkLabel lnk;
 Button btn;
 public ImageLists()
 {
      Size = new Size(300,300);
   imgList = new ImageList();
   Image img;
   String[] arFiles = {"1.ico","2.ico","3.ico"};

   for (int i = 0; i < arFiles.Length; i++)
   {
     img = Image.FromFile(arFiles[i]);
     imgList.Images.Add(img);
   }
   imgList.ImageSize = new Size(32, 32);

   lbl = new Label();
      lbl.Parent = this;
      lbl.Text = "Label";
      lbl.Location = new Point(0,0);
      lbl.Size = new Size(lbl.PreferredWidth + imgList.ImageSize.Width, 
     imgList.ImageSize.Height + 10);
      lbl.BorderStyle = BorderStyle.Fixed3D;
   lbl.ImageList = imgList;
   lbl.ImageIndex = 0;
   lbl.ImageAlign = ContentAlignment.MiddleRight;
      int yDelta = lbl.Height + 10;
    
      lnk = new LinkLabel();
      lnk.Parent = this;
      lnk.Text = "LinkLabel";
      lnk.Size = new Size(lnk.PreferredWidth + imgList.ImageSize.Width, 
     imgList.ImageSize.Height + 10);
      lnk.Location = new Point(0, yDelta);
   lnk.ImageList = imgList;
   lnk.ImageIndex = 0;
   lnk.ImageAlign = ContentAlignment.MiddleRight;
   btn = new Button();
   btn.Parent = this;
   btn.ImageList = imgList;
   btn.ImageIndex = imgList.Images.Count - 1;
   btn.Location = new Point(0, 2 * yDelta);
   btn.Size = new Size(3 * imgList.ImageSize.Width, 
             2 * imgList.ImageSize.Height);

   lbl.ImageIndex = 1;
   lnk.ImageIndex = 0;
   btn.ImageIndex = 2;
 }
 static void Main() 
 {
     Application.Run(new ImageLists());
 }

}</source>

Replace an Image with another Image in an ImageList

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; using System.Collections; public class ImageListImageReplace : Form {

 ImageList imgList;
 Button btn;
 public ImageListImageReplace()
 {
      Size = new Size(300,300);
   imgList = new ImageList();
   Image img;
   String[] arFiles = {"1.ico","2.ico","3.ico"};

   for (int i = 0; i < arFiles.Length; i++)
   {
     img = Image.FromFile(arFiles[i]);
     imgList.Images.Add(img);
   }
   imgList.ImageSize = new Size(32, 32);
   img = Image.FromFile("4.ico");
   imgList.Images[imgList.Images.Count - 1] = img;
   btn = new Button();
   btn.Parent = this;
   btn.ImageList = imgList;
   btn.ImageIndex = imgList.Images.Count - 1;
   btn.Location = new Point(0, 20);
   btn.Size = new Size(3 * imgList.ImageSize.Width, 
             2 * imgList.ImageSize.Height);
   btn.ImageIndex = 2;
 }
 static void Main() 
 {
     Application.Run(new ImageListImageReplace());
 }

}</source>