Tagged articles - ASP.NET Core

Found 34 articles tagged with ASP.NET Core

Using dispatcher class to resolve CQRS commands and queries in ASP.NET Core
Injecting dispatcher class instead of multiple commands and queries in controller constructor
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Recently I wrote an article about Automatic CQRS handler registration in ASP.NET Core with reflection in order to reduce number of lines for registering command and query to IOC container in ASP.NET Core. However, this solution does reduce lines for service registration in the startup, you still need to add all command and query handlers as parameters to the controller constructor...read more
Automatic CQRS handler registration in ASP.NET Core with reflection
Registering all query and command handlers in your CQRS implementation in ASP.NET Core
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Command Query Responsibility Segregation (CQRS) pattern is one of my favorite way of handling the Web API requests for a simple reason that is clearly separates reading and writing. Quite often at some stage of the project you will hit the performance bottlenecks which are most probably cause by the way you are reading ow writing your data...read more
Localization of the DTOs in a separate assembly in ASP.NET Core
Localizing validation messages in ASP.NET Core WebAPI
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Since REST services do not have the UI, there is not much space for the localization. Data is sent and retrieved and most of the decisions is made based on the status code of the response...read more
Displaying Azure DevOps build number in Swagger UI for ASP.NET Core
How to add and show Azure DevOps build number in ASP.NET Core project and Swagger UI
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Swagger is a great way to document you REST API endpoints and reduce the need for communication, item spent and the cost for supporting the consumers of you APIs. Apart from providing the info about the endpoints, models, validation it can also display the data of the product...read more
Why you should not use Authorize attributes to protect your API endpoints
Protecting ASP.NET Core WebAPI without using Authorize attribute
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Authentication is an essential component of pretty much any REST API. Most of the resources you expose through REST API services, unless they are protected inside intranet, need to be protected by some kind of authentication...read more
DTO comments from external assembly in Swagger documentation in ASP.NET Core
Involving contract classes documentation from separate assemblies to Swagger
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Contracts, models or DTOs, call them how ever you want, are your connection with the outside world from your REST API. Consumers of your API depend on them and they know what to expect or what your API endpoints expect in communication...read more
Partial update with PATCH using DTOs and AutoMapper in REST WebApi
How to partially update an entity in REST WebApi services with ASP.NET Core
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Implementing partial updates on the REST API is probably the trickiest method to implement. Unlike PUT HTTP method where you pass the whole DTO when you are updating an entity, PATCH method is intended to update only one or few properties of the entity you want to apply change to...read more
Filtering and paging collection result in ASP.NET Core Web API
Paging response data in ASP.NET Core WebApi projects
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Paging a REST API response is equally important as filtering the data returned through REST API endpoints and they quite often come together. Just like filtering, paging limits the amount of data returned from the endpoint, saving both client and server side resources...read more
The best option to use for a return type in ASP.NET Core WebAPI controller
Choosing the proper return type for WebApi controller actions
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Starting from .NET Core version 2.1, there are so far three types of WebApi responses that controller actions can return. All three types had it's own pros and cons but all are lacking in options to satisfy both REST and the high level of testability. The available response types in ASP.NET Core including recently released 2.2 version are ...read more
Registering multiple implementations of the same interface in ASP.NET Core
Multiple implementations of an interface in .NET Core Dependency Injection
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Starting from it's initial release ASP .NET Core comes with built in dependency injection (DI) to help implement Inversion Of Control design pattern. This is not something new in .NET and apart from built-in DI in .NET Core, there are other libraries which provide same and in some cases even more advanced dependency injection implementation...read more
Setting up Kestrel port in configuration file in ASP.NET Core
Reading port from configuration file in Program class Main method
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When running ASP.NET Core application as self-hosted using Kestrel, it will by default use port 5000 for listening for requests. This should not be a big issue since you can always proxy requests to port 5000. Problem occurs when you might want to have multiple applications on one host, or you simply cannot use port 5000 for security or any other reasons.Luckily, default port for ASP.NET Core application running on Kestrel can be easily changed, but in order to make it easily configurable there are few changes you need to make in your code in order to access IHostingEnvironment and IConfiguration implementation instances combined. ...read more
Using DisplayName attribute for model validation output in ASP.NET MVC Core
Returning DisplayName attribute value in model validation response in MVC Core
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Model validation is an important part of request life-cycle and pipeline in MVC Core regardless whether you are building Web API project or ASP.NET MVC web application. Both project templates rely on the common ASP.NET Core platform therefore validation is pretty much the same in both type of projects. Because Web API and micro services are more popular nowadays, I am going to use Web API sample project to demonstrate how to modify validation response in MVC Web API Core project. ...read more
Dependency injection with custom MVC filter attributes in ASP.NET Core
Using dependency injection with custom ExceptionFilterAttribute in ASP.NET Core
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Apart from adding your own middleware to the ASP.NET MVC Core application pipeline, you can control the response using custom MVC filter attributes and selectively apply them to either whole controller or controller actions. One of the commonly used MVC filter in ASP.NET Core is ExceptionFilterAttribute for handling error response in Wep API applications. It is easy to implement and I also wrote an article about Error handling in ASP.NET Core Web API few months ago...read more
Adding healthchecks just got a lot easier in ASP.NET Core 2.2
Setting up and using healthcheck endpoints in ASP.NET Core 2.2
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Health checks or health probes are the crucial part for orchestrating micro services. If you are using Kubernetes for orchestrating containerized application instances or you just have multiple ServiceApps or VMS behind the load balancer, you need to define health checks in order for the orchestrator or load balancer to know to which instance to send the traffic and to which not...read more
Extending Serilog with additional values to log
Adding additional information to log in .NET Core application with Serilog
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If you are building .NET Core application your choice for logger library is most likely Serilog. It is really powerful and easy to use library which allows you easy logging in all levels in your application. One of the best features it has is easy extending of the data you want to have in your logs...read more

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