Config settings in ASP.NET Core Overview

Config settings in ASP.NET Core Overview

Asp.Net Core Configuration Access configuration settings from appsetting.json in Startup Access configuration settings from custom configuration file in Startup Access config settings from appsetting.json in Controller using DI Access config settings using custom class Access config settings directly from class library

Access configuration settings from custom configuration files

In the previous post we saw on how to read configuration settings from the appsettings.json file. While this holds good for most of the cases, there might be situations where we will need our custom configuration file, when we use our own configuration file, we need to specify the file in the Startup and add the file to the ConfigurationBuilder.

In the below case we have a custom configuration file mysettings.json, and we will read the configuration settings from our config file.

Access configuration settings from appsetting.json

We saw about the various configuration options provided by .Net Core in the previous post. In this post we shall see on how to use the configuration file option to store and retrieve key-value configuration settings.

Traditionally we are used to store configuration settings in environmental variables or config files like .INI files, web.config files etc. Asp.Net core provides a default JSON based configuration file called appsettings.json file. In this post we shall see on how to read configuration settings from the appsettings.json file in the application startup.

Asp.Net Core Configuration

Configuration settings is an important part of any large application. We will have to store and use various config settings like connection string, file path etc in an application. In the older version of Asp.Net Applications configuration settings were stored in web.config files which is an XML file. The System.Configuration namespace was used to read key-value pairs from XML configuration file web.config.

Asp.Net Core provides various options to store and retrieve configuration settings. Following are some of the options provided by Asp.Net Core to store and retrieve configuration settings.