Gunnar Peipman's ASP.NET blog

.Net Framework 4.0 Beta 2 has new IsNullOrWhiteSpace() method for strings generalizes IsNullOrEmpty() method to incluse also other white space besides empty string. In this posting I will show you simple example that illustrates how to use IsNullOrWhiteSpace() method.

.Net Framework 4.0 Beta 2 introduces new class in System.Numerics namespace: Complex. Complex represents complex numbers and enables different arithmetic operations with complex numbers. In this posting I will show you how to use complex numbers in .Net Framework 4.0 applications.

Couple of days ago I got e-mail with good news: my ASP/ASP.NET MVP status continues! I am really glad because Microsoft finds my public activities good enough and it gives me certainty that I am moving the right way.

After restarting my virtual development machine IIS was not able to start anymore. I checked out if there is something reported to Event Viewer and I found the following error message – Error 12: The data is invalid. It turned out that during shutdown of my virtual machine IIS config file was ruined. Solution to my problem was very simple.

In one of my current projects I needed something that takes image uploaded by user and converts it to avatar image. There is requirement for avatar images: they must be 32x32 pixel squares. Here is my solution.

I used LINQ to solve the following problem: find all titles of objects at hierarchy level X when you know object ID in hierarchy level Y. I cannot imagine if there is some other solution that is same short and clear as one that LINQ provides. Take a look and decide by yourself.

I needed some elegant method to read registry values in my Live Writer Delicious bookmarks plug-in. RegistryKey has GetValue() method but it returns values as object. I wrote generic version of GetValue() as RegistryKey extension method. It returns you specified value from key and converts it to type you ask. If conversions are not successful then default value of given type will be used.

Bookmarks2LiveWriter is Windows Live Writer plug-in that is targeted to serious bloggers who also publish bookmarks postings. Bookmarks2LiveWriter lets you download bookmarks for given date range from Delicious and inserts them to current posting. Users can remove unwanted bookmarks and format bookmarks list before inserting it. Bookmarks2LiveWriter is released under GPL. Installer and source code are freely available to everybody.