Mar 14, 2006 2 min read ASP.NET

Implement PICS and P3P in ASP.NET headers

PICS (Platform for Internet Content Selection) and P3P (Platform for Privacy Preferences) are two really nice things to be aware of when developing web applications. If your website targets children, maybe you sell toys...

Mar 14, 2006 1 min read ASP.NET , Server-side

Remove HTML tags from a string

A lot of websites allow users to input text and submit it to the site. This could be forums, blogs, content management systems etc. Imaging if the user writes HTML into these form fields? It could be perfectly harmless...

Mar 13, 2006 3 min read ASP.NET

Create beautiful thumbnails from gif images in ASP.NET

There are a lot of tutorials on the web about making thumbnails in ASP.NET. I’ve used some my self over the years. They all show how easy it is, but they all lack some fundamental functionality: Create good thumbnails...

Mar 8, 2006 2 min read ASP.NET

Convert HTML tags to lower-case for XHTML compliance

The XHTML definition demands all tags to be lower-cased. Your page will not validate otherwise and will therefore not be valid XHTML. If you write all your XHTML by yourself, it shouldn’t be an issue. You simply write...

Mar 6, 2006 1 min read ASP.NET

Force x number of rows in a GridView

Today I had to find a way to force x number of rows on a GridView. The problem is that if the GridView.PageSize is larger than the number of rows you are data binding, the GridView itself gets smaller in the height. You...

Feb 27, 2006 2 min read ASP.NET , Client-side

The old confirm button trick

You have probably at some point clicked the wrong input button on a web page, and something bad happened. You deleted the wrong user, submitted to the wrong newsletter or something similar. Wouldn't it have been nice if...

Feb 20, 2006 1 min read ASP.NET

Override the html form in ASP.NET for URL rewriting

If you are using URL rewriting, the ASP.NET HTML form tag doesn't support it. You have to override the form tag in order to make it work. It was a bug in ASP.NET 1.x and still haven't been fixed in 2.0. Here is the class...

Feb 17, 2006 1 min read ASP.NET

Client Callback and Page.IsPostBack

I just spend ½ hour trying to find out, why my client callbacks where executing code inside the if (!Page.IsPostBack) region of my Page_Load method. It turns out, the Page class in .NET 2.0 has now got a new property...

Feb 15, 2006 3 min read ASP.NET

Export a DataTable to XML and CSV

If you have a DataTable or DataView you want to export to XML or CSV, I will show you have to do just that. The CSV format is also compliant with Excel, which in my opinion makes it the best suited format for...

Feb 12, 2006 2 min read ASP.NET

Remove whitespace from stylesheets and JavaScript files

There is a lot of whitespace in both stylesheets and JavaScript files. This is because of indented text and line breaks to name a few. They are typically also filled with comments to make them more maintainable. Believe...