FeatureSelect is a flexible feature toggle library with ASP.NET Core integration.
Install via NuGet
Install-Package FeatureSelect
Create a feature source and use it get a feature. A "feature" takes two functions, one to execute if the feature is enabled, and one to execute if the feature is disabled.
var source = new ConfigurationFeatureSource(Configuration);
var feature = source.GetFeature("MyFeature");
var result = feature.Execute(() => "My feature is enabled", () => "My feature is disabled");In order to integrate with ASP.NET Core, register FeatureSelect in Program.cs using the AddFeatureSelect extension method.
var builder = WebApplication.CreateBuilder(args);
var config = builder.Configuration;
builder.Services.AddControllers();
builder.Services.AddFeatureSelect(config.GetSection("Features"));
var app = builder.Build();
app.UseRouting();
app.MapControllers();
app.Run();Now in your controllers you can use the [IfEnabled] and [IfDisabled] attributes to toggle on/off any controller or route.
[IfEnabled("Customers")]
public class CustomerController
{
[HttpGet("/customers")]
[IfEnabled("GetCustomers")]
public IActionResult Get()
{
...
}
}You can also inject an instance of FeatureSource.
public class MyController
{
[HttpGet("/my-feature")]
public string Get([FromServices] FeatureSource features)
{
return features
.GetFeature("MyFeature")
.Execute(() => "My feature is enabled", () => "My feature is disabled");
}
}In order to configure which features are enabled simple define them in appsettings.json, or you User Secrets or environment variables.
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"Features": {
"feature1": "enabled",
"feature2": "diabled",
"feature3": "enabled"
}
}