Visual Studio 2010 Beta 2 downloads
Here are some download links to Visual Studio 2010 Beta 2 and related technologies.
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Using ASP.NET and Jcrop to crop images online
Cropping images in ASP.NET is easy task to do if you use right tools. In this posting I will introduce how to crop images using Jcrop and System.Drawing namespace classes. What we are building is simple and user-friendly image cropping interface that also demonstrates some simple features of Jcrop. Believe me, your users will love it!
Read more.Net Framework 4.0: VB.NET supports automatic properties
Next version of .Net Framework brings some new features also to VB.NET. One of those new features is support for
Read moreWriting cache based repositories for web application prototyping
When I started building in-house demo application I thought about how to solve temporary data layer so I don’t have to use real database and object mappings for it. Playing with new object model and new components I move way faster if I don’t have any additional ballast that I can avoid. So I wrote simple cache based repository mechanism I can use to imitate real repositories that I will write in the future.
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Enumerating file system objects in C#
In my last posting I introduced new ReadLines() method and new overloads for WriteAllLines() method of File class. But there are more new stuff in System.IO namespace. In .Net Framework 4.0 Directory and DirectoryInfo class are able to enumerate files, directories and file system entries. In this posting I will show you these new features.
Read more.Net Framework 4.0: System.IO.File supports now IEnumerable
.Net Framework 4.0 adds also some new and cool features to file system objects. File class has now ReadLines() methods that returns IEnumerable. WriteAllLines() methods has two overload methods that accept IEnumerable instead of strings array that was also supported in previous versions of .Net Framework. This posting introduces ReadLines() and WriteAllLines() methods and gives you some ideas how to use these methods in your applications.
Read moreString.IsNullOrWhiteSpace() method in C#
.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.
Read moreComplex numbers with C#
.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.
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IIS won’t start – Error 13: The data is invalid.
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.
Read moreCreating squared avatar images
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 32×32 pixel squares. Here is my solution.
Read moreUsing LINQ to query object hierarchies
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.
Read moreGetValue() extension method for RegistryKey class
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.
Read moreOptional arguments and named parameters in C#
C# 4.0 supports optional method arguments. Related to this is support for named parameters in function calls. For us it makes easier to use methods which have long argument list. It also introduces some new dangers which may lead us to messy and hard to understand code. In this code I will show how to use optional arguments and give some hints how to avoid messy code.
Read moreDeveloping Delicious applications
I am developing a little piece of software that interacts with Delicious through HTTP API. Using Delicious API puts you
Read moreDisplaying custom HTML in WebBrowser control
I am using WebBrowser control to show preview of automatically generated HTML. Users can select options and preview pane reflects those changes automatically. WebBrowser control has some problems that have been here for years already. Here is my example about how to show custom HTML in WebBrowser control.
Read moreCreating vCard with image in .Net
vCard is popular format for exchanging contacts. Besides e-mail clients also modern mobile phones are able to read and send
Read moreDocumenting source code
Source code documenting is very important task. Code documentation servers as persisted communication between developers who are using same code. Undocumented or poorly documented code may be hard to understand to other developers who have then waste their valuable time to struggling through the code they don’t understand well. In this posting I introduce you some code documenting tips.
Read moreModeling people and organizations: Party generalization
Classes for people and organizations are often modeled incorrectly in object models. These faults cause heavy implementation problems. In this posting I will analyze some legacy models, introduce class Party as generalization of people and organizations and provide some implementation details. Information here is based on my own experience, like always.
Read moreVisual Studio 2010: Database projects
Visual Studio 2008 introduced us database projects. These projects are also present in Visual Studio 2010. I noticed some differences already when building my photo gallery application. Let’s see how these projects work under Visual Studio 2010.
Read moreAgile Principles, Patterns, and Practices in C#
Agile Principles, Patterns, and Practices in C# by Robert C. Martin and Micah Martin describes how to write software using C#. Book covers also most important design patterns and object-oriented development principles. There are very good, close to reality examples for every topic and that makes this book pretty easy to read and understand.
Read moreBlogging Heroes: Interviews with 30 of the World’s Top Bloggers
Blogging Heroes: Interviews with 30 of the World’s Top Bloggers by Michael A. Banks is book that every blogger should read. It is not another book that is just somehow covering popular topic and makes easy money to author. I think this is serious book, really.
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