Question

I have a Visual Studio 2005 site which has been up a running for a while. I have an image (.JPG) on this site that I think I need to apply some JavaScript to or something?

Essentially I have 25 images for the month of December and instead of going into the site daily to change this image to another one I was hoping to be able to complete this by code automatically.

I have some .NET skills but I think that I might needs to use JavaScript to complete this task. Can anyone point me in the right direction or provide me with some sample code that could help?

Answer 1

I think the simplest way would be to rename all images to things like “December1.jpg”, “December2.jpg”, “December3.jpg” etc. Then server-side you would have this:

<img src="/path/to/images/December<%=DateTime.Now.Day%>.jpg"/>

This would just add the day of the month to your image name. There are fancier ways to do it, but for a one-time-deal, you can’t get much simpler than this.

EDIT:
You might also throw in an “if exists” for your images so that on the 26th you don’t end up with a 404 image. Something like this:

Change your image to add an id and default it to hidden:

<img id="dayImage" runat="server" Visibility="false" src="/path/to/images/December<%=DateTime.Now.Day%>.jpg"/>

Then on the code behind:

if (File.Exists(@"C:\path\to\images\December" + DateTime.Now.Day + ".jpg"))
{
    //this will show the image if it exists on the disk
    dayImage.Visibility = true;
}

For more on that go here: http://www.dotnetperls.com/file-exists