Table of contents

• Intro
• Create feature constant
• Create feature definition provider
• Expose api base on feature
• IFeatureChecker service

Intro

ABP Feature system is used to enable, disable or change the behavior of the application features on runtime.

Create feature constant

1public static class TodoFeatures
2{
3    public const string Todo = "Todo";
4    public const string MaxTodoPerUser = "MaxTodoPerUser";
5}

Create feature definition provider

1public class TodoFeatureDefinitionProvider : FeatureDefinitionProvider
2{
3    public override void Define(IFeatureDefinitionContext context)
4    {
5        var myGroup = context.AddGroup("MyTodoApp");
6
7        myGroup.AddFeature(
8            TodoFeatures.Todo,
9            defaultValue: "false",
10            displayName: L("Todo"),
11            valueType: new ToggleStringValueType()
12        );
13
14        myGroup.AddFeature(
15            TodoFeatures.MaxTodoPerUser,
16            defaultValue: "10",
17            displayName: L("MaxTodoPerUser"),
18            valueType: new FreeTextStringValueType(
19                            new NumericValueValidator(0, 1000000))
20        );
21    }
22
23    private static LocalizableString L(string name)
24    {
25        return LocalizableString.Create<TodosResource>(name);
26    }
27}

Expose api base on feature

You can use the RequiresFeature attribute to restrict access to the api endpoint.

1[RequiresFeature(TodoFeatures.Todo)]

IFeatureChecker service

you can use the FeatureChecker service to check if the feature is enabled or not and get the value of the feature.

1var maxTodoPerUser = await FeatureChecker.GetAsync<int>(TodoFeatures.MaxTodoPerUser);

For more info check the official docs : https://docs.abp.io/en/abp/latest/Features