Divsion issue with Asp.NET Image Resizing

Question

User931330785 posted

I am wanting to resize images in the background. I do this because the images we have on our site are rather large and I did not want to resize each one because eventually there will be links to the original file for downloading.

For  some reason some images resize properly (http://www.ajnicholsfam.com/gallery/image.aspx?img=001.jpg) while others do not (http://www.ajnicholsfam.com/gallery/image.aspx?img=009.jpg).

I have attached the source below and from my output all my math is proper, yet for some reason asp does not seem to do it properly.

1    <%@Import Namespace="System.Drawing.Imaging" %>
2    <script language="<span" class="st">"c#" runat="server">
3    
4    public bool ThumbnailCallback(){return false;}
5    
6    protected void Page_Load(Object sender, EventArgs e)
7    {
8    	System.Drawing.Image.GetThumbnailImageAbort dummyCallBack = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
9    	System.Drawing.Image fullSizeImg = System.Drawing.Image.FromFile(Server.MapPath("/images/" + Request.QueryString["img"]));
10   	fullSizeImg.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipNone);
11   	fullSizeImg.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipNone);
12   	int width = 640;
13   	int height = (fullSizeImg.Height/(fullSizeImg.Width/width));
14   	if (Request.QueryString["w"] != null)
15   	{
16   		width = Convert.ToInt32(Request.QueryString["w"]);
17   		height = Convert.ToInt32(Request.QueryString["w"]);
18   	}
19   
20   	/*System.Drawing.Image thumbNailImg = fullSizeImg.GetThumbnailImage(width, height, dummyCallBack, IntPtr.Zero);*/
21   
22   	Response.Write(fullSizeImg.Height + "&lt;br>");
23   	Response.Write(fullSizeImg.Height + "/(" + fullSizeImg.Width + "/" + width + ")<br>");
24   	Response.Write((fullSizeImg.Height/(fullSizeImg.Width/width)) + "&lt;br>");
25   	Response.Write(fullSizeImg.Height/(fullSizeImg.Width/width) + "&lt;br>");
26   	Response.Write(width + "&lt;br>");
27   	Response.Write(height);
28   	/*fullSizeImg = thumbNailImg;*/
29   
30   	/*Response.ContentType = "image/Jpeg";
31   	fullSizeImg.Save(Response.OutputStream, ImageFormat.Jpeg);
32   	fullSizeImg.Dispose();*/
33   }
34   
35   </script>