c# - How to read AppSettings values from a .json file in ASP.NET Core

C# - How to read AppSettings values from a .json file in ASP.NET Core

In ASP.NET Core, you can read AppSettings values from a JSON configuration file using the Configuration API. Here's how you can do it:

  1. Create or modify your appsettings.json file:
{ "AppSettings": { "Key1": "Value1", "Key2": "Value2" } }
  1. Read AppSettings values in your ASP.NET Core application:
using Microsoft.Extensions.Configuration; namespace YourNamespace { public class YourClass { private readonly IConfiguration _configuration; public YourClass(IConfiguration configuration) { _configuration = configuration; } public void ReadAppSettings() { // Read a single value string value1 = _configuration["AppSettings:Key1"]; string value2 = _configuration["AppSettings:Key2"]; // Or bind the whole section to a class var appSettingsSection = _configuration.GetSection("AppSettings").Get<AppSettings>(); // Use the values as needed Console.WriteLine($"Value1: {value1}, Value2: {value2}"); Console.WriteLine($"Value1: {appSettingsSection.Key1}, Value2: {appSettingsSection.Key2}"); } } public class AppSettings { public string Key1 { get; set; } public string Key2 { get; set; } } }
  1. Register the Configuration instance in your Startup.cs:
using Microsoft.Extensions.Configuration; public class Startup { public Startup(IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } public void ConfigureServices(IServiceCollection services) { // Register IConfiguration instance services.AddSingleton(Configuration); // Other service registrations... } public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { // Configure middleware... app.UseRouting(); // Other configurations... } }

This way, you can easily read AppSettings values from your JSON configuration file in ASP.NET Core.

Examples

  1. "C# ASP.NET Core read AppSettings from JSON file"

    • Description: This query is about accessing configuration settings stored in a JSON file within an ASP.NET Core application using C#.
    using Microsoft.Extensions.Configuration; public class AppSettingsReader { private readonly IConfiguration _configuration; public AppSettingsReader(IConfiguration configuration) { _configuration = configuration; } public string GetAppSetting(string key) { return _configuration[key]; } }

    This code snippet demonstrates a class that reads AppSettings values from a JSON file in ASP.NET Core. It uses the IConfiguration interface provided by ASP.NET Core for configuration management.

  2. "C# ASP.NET Core read settings from appsettings.json"

    • Description: This query aims to find information on how to retrieve configuration settings specifically from the appsettings.json file in an ASP.NET Core application.
    using Microsoft.Extensions.Configuration; using Microsoft.Extensions.Configuration.Json; public class AppSettingsReader { private readonly IConfiguration _configuration; public AppSettingsReader() { var builder = new ConfigurationBuilder() .AddJsonFile("appsettings.json"); _configuration = builder.Build(); } public string GetAppSetting(string key) { return _configuration[key]; } }

    This code shows a class that reads AppSettings values from the appsettings.json file in an ASP.NET Core application. It uses ConfigurationBuilder to build configuration settings from the JSON file.

  3. "C# ASP.NET Core read configuration values from JSON file"

    • Description: This query is looking for ways to access configuration settings stored in a JSON file within an ASP.NET Core environment using C#.
    using Microsoft.Extensions.Configuration; public class AppSettingsReader { private readonly IConfiguration _configuration; public AppSettingsReader() { var builder = new ConfigurationBuilder() .AddJsonFile("appsettings.json"); _configuration = builder.Build(); } public string GetAppSetting(string key) { return _configuration[key]; } }

    This code snippet presents a class that reads configuration values from a JSON file (appsettings.json) in an ASP.NET Core application. It utilizes the ConfigurationBuilder to load settings from the JSON file.

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