How to use appsettings json in asp net core 6 program cs file

Introduction

ASP.NET is a popular language used for building web applications. In this article, we will discuss how to use appsettings.json in an ASP.NET Core 6 program's cs file. The appsettings.json file is used to store configuration settings for an application.

Step 1: Create appsettings.json File

The first step is to create an appsettings.json file in your ASP.NET Core 6 project. This file will contain the configuration settings for your application. Here is an example of how the appsettings.json file may look like:

{
  "AppSettings": {
    "": "Server=myServerAddress;=myDataBase;User Id=myUsername;Password=myPassword;",
    "ApiKey": "your-api-key"
  }
}

Step 2: Access Configuration Settings in Program.cs

To access the configuration settings in the appsettings.json file, you need to modify the Program.cs file in your ASP.NET Core 6 project. Here is an example of how you can access the configuration settings:

using Microsoft.Extensions.Configuration;

public class Program
{
    public static void Main([] args)
    {
        var configuration = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json")
            .();

        var connectionString = configuration.GetSection("AppSettings:ConnectionString").Value;
        var apiKey = configuration.GetSection("AppSettings:ApiKey").Value;

        // Use the configuration settings in your application
        // ...
    }
}

In the above example, we use the ConfigurationBuilder class to build a configuration object. We then use the GetSection to retrieve the values of the configuration settings.

Step 3: Use Configuration Settings in Your Application

Once you have retrieved the configuration settings, you can use them in your application. For example, you can use the connection string to to a database or use the API key to make API calls. Here is an example of how you can use the configuration settings:

using System.Data.SqlClient;

public class MyDatabase
{
    private readonly string _connectionString;

    public MyDatabase(string connectionString)
    {
        _connectionString = connectionString;
    }

    public void Connect()
    {
        using (var connection = new SqlConnection(_connectionString))
        {
            // Connect to the database
            // ...
        }
    }
}

In the above example, we create a class MyDatabase that takes the connection string as a in its constructor. We can then use this connection string to connect to the database.

Conclusion

In this article, we discussed how to use appsettings.json in an ASP.NET Core 6 program's cs file. We learned how to create the appsettings.json file, access the configuration settings in the Program.cs file, and use the configuration settings in our application. By following steps, you can easily manage and use configuration settings in your ASP.NET Core 6 application.

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