In ASP.NET Core, How Can We Retrieve AppSettings Values From A .json File Using C#?

To read AppSettings values from a .json file in ASP.NET Core, you can follow these steps:

  1. Create an appsettings.json file in the root directory of your project, if it does not exist already. This file will contain the AppSettings values.
  2. Populate the appsettings.json file with the desired AppSettings values. For example:
{
  "AppSettings": {
    "Setting1": "Value1",
    "Setting2": "Value2"
  }
}
  1. In your ASP.NET Core application, open the Startup.cs file.
  2. Inside the ConfigureServices method, add the following code to read the AppSettings values:
// Add support for reading AppSettings from the configuration file
var configuration = new ConfigurationBuilder()
    .AddJsonFile("appsettings.json")
    .Build();

// Get the AppSettings section from the configuration
var appSettingsSection = configuration.GetSection("AppSettings");

// Register the AppSettings object for DI (Dependency Injection)
services.Configure<AppSettings>(appSettingsSection);
  1. Create a strongly typed class AppSettings to represent the AppSettings values. For example:
public class AppSettings
{
    public string Setting1 { get; set; }
    public string Setting2 { get; set; }
}
  1. In your controller or service, inject the IOptions<AppSettings> to access the AppSettings values. For example:
private readonly AppSettings _appSettings;

public MyController(IOptions<AppSettings> appSettings)
{
    _appSettings = appSettings.Value;
}

public IActionResult MyAction()
{
    // Access the AppSettings values
    var setting1Value = _appSettings.Setting1;
    var setting2Value = _appSettings.Setting2;

    //...
}

Now, you can read the AppSettings values from the appsettings.json file in your ASP.NET Core application using the AppSettings object.

About the Author Rex

I'm a passionate tech blogger with an insatiable love for programming! From my early days tinkering with code, I've delved into web dev, mobile apps, and AI. Sharing insights and tutorials with the world is my joy, connecting me to a global community of like-minded tech enthusiasts. Python holds a special place in my heart, but I embrace all challenges. Constantly learning, I attend tech conferences, contribute to open-source projects, and engage in code review sessions. My ultimate goal is to inspire the next generation of developers and contribute positively to the ever-evolving tech landscape. Let's code together!