HowTo

If you would like to (for example) make sure all the jpegs on your site are displayed including a copyright text or something like that, you could use the example I posted before. But it would be easier to write a custom httpHandler. Here’s a small howto:

Normally, if you would like a singleton implementation of a class, you would go about it a little bit like this:

public class BloggingAbout
{
    private static BloggingAbout bloggingAbout;
   
    private BloggingAbout()
    {
    }

This one is actually quite simple: Crystal Reports supports exporting to a PDF. Exporting can be done to disk, or to a stream. And a stream can be written to the Repsonse property of a page. And there you go 😉

You might want to be able to let your assembly show up in the Add Reference window in Visual Studio without the user having to browse for it. When you install your assembly in the GAC, it doesn’t automatically show up in the Add Reference window, because it doesn’t enumerate all assemblies in the GAC. Installing in the GAC only eliminates the need to copy assemblies localy when referencing them. Microsoft doesn’t recommend putting assemblies in the GAC by the way…

The following method returns the MD5 hash for any given string. For instance for a password. It might be of some assistance when you’re trying to validate user credentials but you don’t want to store the password readable in the database.

The AdRotator .NET provides can be used to show a different image each time a page is visited. You could write a webpage which does this for you, but it’s probably not very useful. Although you need to change the XML file when changing the images to be showed when you use an AdRotator, but that’s not the issue here.
Something .NET doesn’t deliver is a control to add your own text to an image when it is displayed on a webpage. And that’s exactly what we will be doing in this HowTo.

.NET does not give you possibilities to create animated GIFs through GDI+. At least 1.1 doesn’t, they might incorporate it in 2.0. But there are ways to make them! This solution is one I used myself, and I’m very pleased!