C# .NET - how to convert small image into big image (zoom)?

i am use some photos in my website..i has displying image on label (small images) if now i click that images then image will display zoom(big size compare from normal size)..is it possbile?

Enter your C# source code below and click submit to color code.

public Image PictureBoxZoom(Image img, Size size)
{
    Bitmap bm = new Bitmap(img, Convert.ToInt32(img.Width * size.Width), Convert.ToInt32(img.Height * size.Height));
    Graphics grap = Graphics.FromImage(bm);
    grap.InterpolationMode = InterpolationMode.HighQualityBicubic; 
    return bm;
}
In the code above, we create a new instance of the Bitmap class using the image passed to the function. This image is scaled to the specific size and is taken into a Graphics object where the image is prefiltered using InterpolationMode.HighQualityBicubic to ensure high quality transformed images. The function then returns the transformed image back to the caller.

 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
 public partial class Simple : System.Web.UI.Page
 {
     private SharpMap.Map myMap;
 
     protected void Page_Load(object sender, EventArgs e)
    {
         //Set up the map. We use the method in the App_Code folder for initializing the map
         myMap = MapHelper.InitializeMap(new System.Drawing.Size((int)imgMap.Width.Value,(int)i  mgMap.Height.Value));
       if (Page.IsPostBack)
        {
            //Page is post back. Restore center and zoom-values from viewstate
             myMap.Center = (SharpMap.Geometries.Point)ViewState["mapCenter"];
            myMap.Zoom = (double)ViewState["mapZoom"];
         }
        else
        {
            //This is the initial view of the map. Zoom to the extents of the map:
            //myMap.ZoomToExtents();
             //or center on 0,0 and zoom to full earth (360 degrees)
             //myMap.Center = new SharpMap.Geometries.Point(0,0);
            //myMap.Zoom = 360;
             //Create the map
            GenerateMap();
     }
 
    protected void imgMap_Click(object sender, ImageClickEventArgs e)
     {
         //Set center of the map to where the client clicked
        myMap.Center = myMap.ImageToWorld(new System.Drawing.Point(e.X, e.Y));
         //Set zoom value if any of the zoom tools were selected
         if (rblMapTools.SelectedValue == "0") //Zoom in
             myMap.Zoom = myMap.Zoom * 0.5;
          if (rblMapTools.SelectedValue == "1") //Zoom out
             myMap.Zoom = myMap.Zoom * 2;
         else if (rblMapTools.SelectedValue == "3") // Zoom Extent
             myMap.ZoomToExtents();
 
         //Create the map
         GenerateMap();
     }
 
     /// <summary>
     /// Creates the map, inserts it into the cache and sets the ImageButton Url
     /// </summary>
     private void GenerateMap()
     {
         //Save the current mapcenter and zoom in the viewstate
         ViewState.Add("mapCenter", myMap.Center);
         ViewState.Add("mapZoom", myMap.Zoom);
         //Render map
         System.Drawing.Image img = myMap.GetMap();
         string imgID = SharpMap.Web.Caching.InsertIntoCache(1, img);
         imgMap.ImageUrl = "getmap.aspx?ID=" + HttpUtility.UrlEncode(imgID);
     }
 
 

Hi

Try the code bellow to zoom an image on a label...

 [STAThread]
        static void Main()
        {
            Application.Run(new ImageZoom1());
        }
        protected override void OnPaint(PaintEventArgs e)
        {   ImageZoom();    }
     
         protected void ImageZoom()
        {
            Graphics g1 = Graphics.FromHwnd(this.label1.Handle);
            Graphics g2 = Graphics.FromHwnd(this.label2.Handle);
            Rectangle rec;
            Rectangle recPart;

            if (this.checkBox1.Checked)
            {
                if (im == null) ReadImage();
       
                rec = new Rectangle(0, 0, label1.Width, label1.Height);
                g1.DrawImage(im, rec);
              
                // Center part:
                recPart = new Rectangle(im.Width/4, im.Height/4, im.Width/2,
                    im.Height/2);
                if(this.radioButton1.Checked)  // Left-Top part
                    recPart = new Rectangle(0, 0, im.Width/2, im.Height/2);
                if(this.radioButton2.Checked)  // Right-Top part
                    recPart = new Rectangle(im.Width/2, 0, im.Width/2, im.Height/2);
                if(this.radioButton3.Checked)  // Left-Down part
                    recPart = new Rectangle(0, im.Height/2, im.Width/2, im.Height/2);
                if(this.radioButton4.Checked)  // Right-Down part
                    recPart = new Rectangle(im.Width/2, im.Height/2, im.Width/2,
                        im.Height/2);

                g2.DrawImage(im, rec, recPart, GraphicsUnit.Pixel);
            }
            else
            {
                Clear(g1);
                Clear(g2);
            }

            g1.Dispose();   g2.Dispose();    
        }

        protected void ReadImage()
        {
            string path = @"image.BMP";
            im = Image.FromFile(path);
           
        }

        protected void Clear(Graphics g)
        {
            g.Clear(this.BackColor);
            g.Dispose();      
            im = null;
            im2 = null;
         
        }
    }
}