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Tag: C#

C#/.NET 1

[HOWTO] React to Unhandled Exceptions in UWP

While developing an UWP application I wanted to log unhandled exceptions. My coach mentioned that in WPF you can register a exception handler to handle unhandled exceptions globally. In UWP it works exactly the same way. Add Unhandled Exception Handler NOTE: This solution does not prevent your app from crashing and exiting. This solution only lets you react to unhandled […]

C#/.NET 3

WPF Series -5- Binding ComboBox or ListBox to Enum

In our WPF application we wanted to bind ComboBox and ListBox controls to enums. The WPF way to set up such a binding is described here. This solution works absolutely fine but it requires the definition of an ObjectDataProvider for every enum. This in turn leads to lower maintainability and the code is not reusable. Due to these disadvantages we […]

C#/.NET 3

WPF Series -4- MahApps.Metro and MahApps.Metro.Resources

To have a modern look and feel we decided to align our WPF application to Microsoft Metro style. To achieve this, we used the open source toolkit MahApps.Metro. MahApps.Metro is a toolkit for creating Metro / Modern UI styled WPF applications. The MahApps.Metro project was started back in 2011 by Paul Jenkins. The source is available on GitHub (see MahApps.Metro […]

C#/.NET 3

WPF Series -3- MVVM Pattern

As mentioned in the previous post of this series the WPF application we implemented follows the MVVM pattern. MVVM stands for Model-View-ViewModel. The MVVM patterns intent is to provide a clean separation of concerns between UI and the business logic. It can be used on all XAML platforms. About MVVM Pattern Microsoft describes the motivation for MVVM pattern as follows […]

C#/.NET 3

WPF Series -2- WPF Application Design

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 […]

C#/.NET 2

WPF Series – Introduction

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 […]

C#/.NET 0

Fix Null Reference Exception in XAML Designer

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 […]

C#/.NET 0

Manual JWT Validation against Azure Active Directory

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 […]

C#/.NET 0

Get NetworkCredential from PSCredential splits Username into Username and Domain

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 an object of type System.Net.NetworkCredential. […]

C#/.NET 0

Transient Error Handling with automatic Retries in C#

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 approach on how to retry […]

C#/.NET 0

Creating SignalR Hub Classes on the fly

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 this The Situation In our […]