Code snippets

By On March 15, 2004 · Leave a Comment

There are so many great resources out there for people who are learning to do Web design and don’t know where to start. I’ve listed a few of my favorites in the links section and I will expand this list as I find the time and the sites.

I thought that I would put my own little bit of information out there for all you just trying to find that perfect way to generate a random image. It’s an asp.net page that will look at all the images in a file and then display a random picture. Pretty cool. This is the effect that is used on the homepage to rotate through a bunch of images.

Here’s the code

<%@ Page LANGUAGE=”C#” %>
<%@ Import Namespace=”System.IO” %>
<%@ Import Namespace=”System.Drawing” %>
<%@ Import Namespace=”System.Drawing.Imaging” %>
<html>
<head>
<title>Image Rotator</title>
<script language=”C#” runat=”server”>
public void Page_Load(object sender, System.EventArgs e) {
//TODO: if an specific image is passed in we should just show that image
string image = Request.QueryString["img"];
System.Drawing.Image img = null;
if(image ==null) {
//array of filenames
string[] filesjpg;
//get all the picture files in the same directory as rotate.aspx
filesjpg = Directory.GetFiles(Server.MapPath(“.”),”*.jpg”);
//get a new Random generator salted with the current second
Random r = new Random(DateTime.Now.Second);
//get an index into the filesjpg array a max = length of the file
int index = r.Next(filesjpg.Length);
//creamte a system.drawing.image object from the selected file
img = System.Drawing.Image.FromFile(filesjpg[index]);
}
else{
img = System.Drawing.Image.FromFile(Server.MapPath(image));
}
//save the object to the Response stream
img.Save(Response.OutputStream,img.RawFormat);
//Flush the output
Response.Flush();
//Clean Up
img.Dispose();
}
</script>
</head>
<body>
</body>
</html>
Tagged with:
 

Comments are closed.