Audit and Consulting of Information Systems and Business Processes
* GitHub Ronald Rink http://github.com/dfch
* GitHiub d-fens http://github.com/dfensgmbh
In a project for one of our customers we used Microsoft OneDrive for data synchronisation. The data gets collected on a tablet and the folder containing the data will be synchronized with OneDrive. On the other side there is a Windows Server that needs to move the data from OneDrive to a network drive. To […]
In one of our current projects we had to access a Microsoft Access Database (.mdb) with PowerShell. I first tried to access the .mdb using the Invoke-SqlCmd Cmdlet from our PowerShell module biz.dfch.PS.System.Data. Unfortunately connecting to the Access database with the Invoke-SqlCmd Cmdlet does not work as it uses SqlClient from the C#/.NET namespace System.Data […]
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 […]
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 […]
During development of a PowerShell binary module I had to do deal with two different credential types (System.Management.Automation.PSCredential and System.Net.NetworkCredential) and came across a behaviour I wanted to write down. The PowerShell binary module I developed contains several Cmdlets. One of them defines a parameter of type System.Management.Automation.PSCredential. Inside the Cmdlet we need to have […]
We at d-fens use Microsoft Code Contracts every day. And certainly with every great tool there are some things that might benefit from some improvement – and code contracts are no exception. There is one particular annoying thing in that the error message for Contract.Result exceptions strips the generic parameters from it. This in essence […]
Inspired by Transient Fault Handling we created a quick helper class to faciliate the automatic retry of various operation that may fail in today’s interconnected environments. Large parts of our Appclusive framework deal with fetching from and pushing information to various backend systems. As they all can (and eventuall will) fail we needed a flexible […]
Recently I wanted to create SignalR hubs for client notification based on a list of internal queues. As SignalR is creating Hubs based on their type names I had to find an approach for dynamically defining classes based on the given queue list. In this blog post I show a way on how to do […]
Ever since we are using StructureMap we are also using this as a cheap replacement for Managed Extensibility Framework (MEF), as it allows us to scan arbitrary assembly paths for additional types to inject. As we are also dealing with configuration sections where we specify which plugins or types we want to use in a […]
While creating a process with Windows Workflow Foundation we wanted to communicate between a workflow activity and the workflow application. For this we decided to use Bookmarks and a TrackingParticipant. The idea was that the Activity should create a bookmark to be consumed by a TrackingParticipant which would process something and then pass control back […]
