Environment Variable Dotnet

Repository Nuget: https://www.nuget.org/packages/braspin_environment_variable_dotnet

Install Nuget Package

dotnet add package braspin_environment_variable_dotnet --version 0.1.10

Example class lauchSettings.json

{
    "environmentVariables": {
        "VARIABLE_BOOLEAN": "true",
        "VARIABLE_LONG": "10",
        "VARIABLE_STRING": "Test",
        "VARIABLE_DOUBLE": "1.15",
        "VARIABLE_ARRAY_STRING": "Item1,Item2"
    }
}

Example class AppSettings.cs inheriting IEnvironmentVariable

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_BOOLEAN", true)]
    public bool Boolean { get; set; } = false;

    [EnvironmentVariable("VARIABLE_LONG", 10000000)]
    public long Long { get; set; }

    [EnvironmentVariable("VARIABLE_STRING", "Title")]
    public string? String { get; set; }

    [EnvironmentVariable("VARIABLE_DOUBLE", 5.1)]
    public double Double { get; set; }

    [EnvironmentVariable("VARIABLE_ARRAY_STRING", ',', new string[]("Item1", "Item2"))]
    public string[] StringArray { get; set; }
}

Add Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddEnvironmentVariable<AppSettings>();
    //...
}

Using in yours Controllers

//...

private readonly AppSettings _config;

public WeatherForecastController(AppSettings config)
{
    _config = config;
}

Annotation Types

Boolean variable without default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_BOOLEAN")]
    public bool Boolean { get; set; };
}

Boolean variable with default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_BOOLEAN", true)]
    public bool Boolean { get; set; };
}

Long variable without default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_LONG")]
    public long Long { get; set; };
}

Long variable with default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_LONG", 100)]
    public long Long { get; set; };
}

Long variable with default, min and max value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_LONG", 100, 0, 200)]
    public long Double { get; set; };
}

Double variable without default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_DOUBLE")]
    public double Double { get; set; };
}

Double variable with default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_DOUBLE", 10.1)]
    public double Double { get; set; };
}

Double variable with default, min and max value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_DOUBLE", 10.1, 0, 20)]
    public double Double { get; set; };
}

String variable without default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_STRING")]
    public string String { get; set; };
}

String variable with default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_STRING", "Title")]
    public string String { get; set; };
}

String Array variable without default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_STRING_ARRAY")]
    public string[] StringArray { get; set; };
}

String Array variable comma separator

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_STRING_ARRAY", ',')]
    public string[] StringArray { get; set; };
}

String Array variable comma separator and with default value

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_STRING_ARRAY", ',', new string[]("Item1", "Item2"))]
    public string[] StringArray { get; set; };
}

String variable with default value and enums values

public class AppSettings : IEnvironmentVariable
{
    [EnvironmentVariable("VARIABLE_LOG_LEVEL", "Info", new string[]{"Trace", "Debug", "Info", "Warning", "Error"})]
    public string LogLevel { get; set; };
}