d-fens GmbH
Audit and Consulting of Information Systems and Business Processes
Beside the vision and the requirements you also have to have an idea how the WPF application should look like in the end. For that purpose we created a few mock ups during first exchange with the customer in the early stages of the project. In the same stage we also created a process diagram (BPMN) that shows all the […]
Before starting development we first had to set up a new WPF project. The projects target framework is .NET Framework 4.6.2 and we used Microsoft Visual Studio Community 2015 as […]
In the first half of 2017 we implemented a WPF project for one of our customers. The aim of the project was to develop a Surface Pro compatible desktop application for data collection in context of civil engineering. The application allows the user to create, save, edit and export protocols of specific buildings. Furthermore it’s possible to create a PDF […]
In a project of ours I stumbled across the topic on how to control the GPIO interface of a Raspberry Pi 3 using the Windows.Devices.Gpio namespace. The mentioned namespace contains a class called GpioController. This class enables you to establish connection to any pin on the Raspberry Pi. You have to use the static method GpioController.GetDefault() to get an instance […]
During developing a user control for a WPF UI I encountered a strange null reference exception in the XAML designer. Strange thing was, that when I started the application and switched to the control which contained the user control, everything worked fine. I could’ve just ignored this problem. However since it is very inconvenient writing XAML code without getting a […]
For our current WebApi project we decided to implement OAuth2 authentication with Azure Active Directory. As our API needs to support other authentication mechanisms like Basic and Negotiate beside OAuth2 we implemented multiple authentication filters that, where each filter is responsible for a specific authentication mechanism. One of these authentication filters, the BearerAuthenticationFilter, is responsible to handle requests that contain […]
For one of our customers we had to implement Cookie handling for authentication purposes. This means reading the session token out of the Set-Cookie header and send the session token in the Cookie header of every request. When using the HttpClient from System.Net.Http there are two possibilites to do that. Either by passing a HttpClientHandler with a CookieContainer to the […]
On Monday and Tuesday, the 21st and the 22nd of November, our company organized an event. A Hackathon. What’s a Hackathon? “A hackathon (also known as a hack day, hackfest or codefest) is a design sprint-like event in which computer programmers and others involved in software development, including graphic designers, interface designers, project managers, and others, often including subject-matter-experts, collaborate […]
The title of today’s post might sound a little bit provoking, as originally MEF and StructureMap are not meant for the same use cases. However, as there is a great deal of overlapping functionality in StructureMap over MEF (and chances are high one is using an IoC framework anyway), it makes sense to check if we can reduce our arsenal […]
Recently I started writing a PowerShell binary module in C# (mainly due to facilitate testing and move away from Pester limitations). In this post I will describe the format of […]
When integrating back end systems we very often would like our build server to run integration tests against our test evironments. The problem is that we do not want to […]
One of the cool features of PowerShell script based Cmdlets is the possibility to define default values for Cmdlet parameters. This is typically done like this: Whenever we invoke such a Cmdlet without specifying the Name parameter the PowerShell runtime will insert the value my default value into that parameter. C# based PSCmdlet provide a similar approach to this by […]
For years all our PowerShell modules we released were script modules (i.e. they were written in PowerShell). However, it is certainly possible to write PowerShell modules in C# as binary modules. Of course there are already plenty discussions whether one or the other approach is better. It really depends on the exact requirements. For us the limitations of Pester (especially […]
We started using strong names for some of our assemblies. Strong named assemblies are assemblies, that get digitally signed with a strong name key to ensure its uniqueness (i.e. in […]
If you have been working with C# and JSON you mmight probably resorted to Newtonsoft.Json, the defacto standard in .NET for handling JSON related data. However, when it comes to […]
Visual Studio supports the generation of data service clients (Service references) for OData services. A data service client is a .NET class that contains methods for accessing the OData service and gets generated based on the metadata provided by the OData service. The client acts as a proxy and translates the method calls into HTTP requests. Mike Wasson describes in […]
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