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Centroid - .NET

This document includes information specific to .NET in Centroid. Refer to the Centroid document for general information, including information the JSON configuration file.

Installation

The Centroid .NET package is hosted at Nuget. Install Centroid using Package Manager Console with Install-Package Centroid.

Config Class with .NET

In .NET, the Centroid.Config class exposes the following:

  • Static FromFile method
  • Constructor
  • ForEnvironment instance method
  • ContainsKey instance method

Note: The examples given in the following sections are based on the JSON configuration file examples in the Centroid document.

FromFile Method

Using the static Config.FromFile(filename) method, you can create an instance of Config from a JSON file, as in the example below.

// FromFile.cs
dynamic config = Config.FromFile("config.json");
var server = config.Database.ServerAddress; // => "my-server.local"

Config Constructor

To load a string instead of a file, create an instance of Config by passing a JSON string to the Config constructor, as in the following example.

// FromString.cs
var json = @"{ ""Database"": { ""Server"": ""my-server.local"" } }";
dynamic config = new Config(json);
var server = config.Database.ServerAddress; // => "my-server.local"

ForEnvironment Instance Method

In the Config instance, you can use the ForEnvironment instance method to retrieve the configuration values for an environment.

If you specify an environment in ForEnvironment, Centroid will merge the requested environment's configuration values with the values in all. Refer to Examples in the Centroid document for information on creating an environment-based JSON configuration file.

To maintain environment awareness, this call adds an environment configuration value, unless your JSON contains an environment (case-insensitive) property already.

With the following example, Centroid will merge the configuration for prod with the configuration for all; the result is then available from a new instance of Config.

// ForEnvironment.cs
var config = Config.FromFile("config.json").ForEnvironment("Prod");
var environment = config.environment; // => "Prod"
var server = config.Database.Server; // => "sql-prod.local"
var solutionPath = config.Solutions.Main; // => "path/to/Main.sln"

ContainsKey Instance Method

In a Config instance, you can use the ContainsKey method to determine if a key exists. This method uses the same case and underscore rules as is used for value lookups.

var json = @"{ ""Database"": { ""Server"": ""my-server.local"" } }";
dynamic config = new Config(json);
config.ContainsKey("database"); // => true
config.ContainsKey("does_not_exist"); // => false