ASP.NET Core, Blazor, .NET, Azure, SharePoint, IoT
Performance of algorithms is important topic if you want to write programs that work fast and doesn’t eat too much resources. In this example I will show you two implementations of famous Fibonacci numbers algorithm and let you compare how these two implementations perform. This posting will be also introduction to my next posting to keep it smaller and to keep focus on point.
Read more.Net Framework 4.0 has parallel computing extensions for LINQ. Previously it was possible to download parallel extensions for LINQ separately from CodePlex. Of course, you can still use these extensions if you have older version that 4.0. I wrote a little, simple and pretty pointless example that illustrates how parallel queries work in .Net Framework 4.0.
Read more.Net Framework 4.0 introduced a new class called Lazy
One quick posting. I wrote yesterday extension method for SharePoint that checks if view exists. I think it is far better for performance if I don’t live on try…catch to find out if view exists or not. Extension method that you have to put in static class is here.
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I wrote web part that uses Repeater control to create some repeating blocks of output. Each of these blocks has Button control in it. When I ran web part under SharePoint I got the following error: Invalid postback or callback argument. Event validation is enabled using in configuration or in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. Here is the solution.
Read moreWeb page that is not attacked by security team or developers and testers before going to live can be considered
Read moreI needed a little bit customized forms that look similar to standard ones for one SharePoint solution. I have list with many fields and it is very inconvenient for users to fill these fields if they are following one after another. As there is no simple solution for this I created my own custom solution.
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I am writing currently one simple web application that runs on usual hosting environment and also on Azure environment. Web application is already hosted in CodePlex and during next two months I will publish application binaries and also source code. I tested my application in Azure environment and here are some screenshots I made.
Read moreAfter reading the books Ship it! and The Pragmatic Programmer, I suggest you to read both of them, I got some proof that I am right and the fast way I sometimes like to move is not my personal bad behaviour but suggested way to develop software. Officially it is calledtracer bullet development. This method suggest you to write some code to make system work for customer so they can see how the system is planned. But this is not a usual prototyping procedure but involves some real coding work too.
Read moreI had to write some ASP.NET server controls for our current SharePoint portal project. We have very nice DIV-based layout and using standard components that generate table and a lot of JavaScript seems to me like an bad idea. I found out that server controls put container tags around their mark-up. I needed my own tags around output and I found a way how to achieve it.
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When changing tables in SQL Server Management Studio 2008 you may get the following error: Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. I was surprised when I saw this message first but there is very simple solution.
Read moreThe Pragmatic Programmer: From Journeyman to Master is good reading for all developers and good addition to Ship it! A Practical Guide to Successful Software Projects. The Pragmatic Programmer is about developers everyday work and provides solutions and ideas about how to solve problems we may face more than once.
Read moreI needed list item display view toolbar on one of the custom forms. It wasn’t very easy to find it from many files but I found it at last. Nice to be beginner anyway.
Read moreTests tell us if our software works as expected. But they tell us almost nothing about side effects of technical environment where system lives. We can face different problems when test users start testing system in their environment and we want to be ready to react fast to all problems. To get information about system’s work we need advanced logging.
Read moreSharePoint usually surprises me on the most busiest moments. I wrote web part that has some custom properties. These properties were simple ones and it was okay to show these properties in Miscellaneous section of web part property sheet. Although properties were defined nothing new showed up in property sheet.
Read moreOne of my readers asked for example about my image resizing routine. Here you can find example and also some notes about my code design solution.
Read moreASP.NET provides us with System.Drawing namespace where we can find classes we can use to manipulate with images. There are many people out there who mistakenly think thatImage.GetThumbnailImage is best choice for image resizing. You can easily create crappy images if you follow the code examples in previously pointed article. In this post I will show you how to resize images without negative side effects.
Read moreOne of ASP.NET MVC errors wasted one hour of my life today (of course, it is many times less than this season’s leader SharePoint) but this is still one hour. “The view ‘Index’ or its master could not be found. The following locations were searched” error raised suddenly and I was not able to get over it. Well, this time solution was simple.
Read moreLoggers are one of most popular examples about interfaces for sure. And there are a lot of implementations of loggers. Some implementations are simple and yet powerful, some implementations may be more complex. All we have to is to select implementation we need and integrate it to our application. It seems like good idea at first place but as soon as we need to switch from one implementation to another we discover nasty dependencies we have to change in all places where we are logging. Let’s see how to avoid these dependencies.
Read moreI’m sure you have seen classes that initialize a lot of objects in their constructor. These classes may be hard to test because of those object creations I mentioned. To get around this problem we use Extract and override factory method refactoring so we can extend these classes and override some factory methods.
Read moreSometimes you are not able to use Extract Interface refactoring because interface of parameter may be too large or there may be no interface at all. You just have class to pass in and you are not able to fake it or extend it to get class testable. In this case you have to use Adapt Parameter refactoring to create adapter that is seen through common some common class of interface.
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