Customize ASP.Net JSON Serialization to Localize Data

Localization of UI is one of the key points in a global application and there are numerous solutions for it. In some cases you may want to localize data. As for the localization of data, it is more custom requirement and there is no so common options for it. In this case we localized the Summary property of WeatherForecast entity. To apply a more custom logic you can modify LocalizedPropertyAttribute attribute or LocalizeAttribute method of the AppEntityDataContract.

It is important to store localization values in a fast place like an inmemory dictionary.

Customize ASP.Net JSON Serialization to Apply Column Based Security

SecurePropertyAttribute can be used to appy column based security. If current user is not in the one of desired roles, the property returns maskedValue. ApplyColumnSecurity is used to check roles and set value of the property. As in the previous case, we used json serialization modifiers in the Program.cs.

builder.Services.AddOptions<Microsoft.AspNetCore.Mvc.JsonOptions>().Configure<AppEntityDataContract>((options, dataContract) =>
{
    options.JsonSerializerOptions.TypeInfoResolver = new DefaultJsonTypeInfoResolver()
    {
        Modifiers = 
        {
            dataContract.LocalizeAttribute,
            dataContract.ApplyColumnSecurity
        }
    };
});

Run Demo

1. Press F5.
2. Call GetWeatherForecast.
3. Check Summary field. Since you have not logged in yet and declare the property as secure, expect to see null.
4. Call Login.
5. Call GetWeatherForecast.
6. Check Summary field. Expect to see localized value instead set inside the action.
7. Call GetMyCustomEntity.
8. Check Value field. Since you have logged in as customer, expect to see 0.
9. Call LoginAsAdmin.
10. Call GetMyCustomEntity.
11. Check Value field. Expect to see a random integer value.