[태그:] .net

string SecretName = ConfigurationManager.AppSettings["SecretName"]

<appSettings>    
  <!--Application Settings-->
  <add key="SecretName" value="Name" />
  <add key="SecretKey" value="p@ssWord!" />    
</appSettings>

public class SecretOptions
{    
    [Option("SecretName")]
    public string secretName { get; set; }
               
    [Option("SecretKey")]
    public string secretKey { get; set; }             
}

public interface IOptions<T>
{
    T Value { get; }
}

public class Options<T> : IOptions<T>
{
    private readonly T model;
    private readonly List<string> AppSettingNames;
    
    public Options()
    {      
        AppSettingNames = ConfigurationManager.AppSettings.AllKeys.ToList();           

        T instance = Activator.CreateInstance<T>();

        model = (T)SetConfig(instance.GetType());
    }

    private object SetConfig(Type type)
    {
        object instance = Activator.CreateInstance(type);

        var instanceProperties = instance.GetType().GetProperties();

        foreach (var property in instanceProperties)
        {
            //If it is a hierarchical option class, it is searched recursively.
            if (property.GetCustomAttribute<OptionObjectIgnoreAttribute>() != null)
            {
                property.SetValue(instance, SetConfig(property.PropertyType));
            }

            //If an attribute does not have an 'OptionAttribute', the value is searched by the attribute's original name. 
            //but if there is, the value is searched by the set name at 'OptionAttribute'
            var name = AppSettingNames.FirstOrDefault(m => property.GetCustomAttribute<OptionAttribute>() == null ?
                                                            property.Name.Equals(m, StringComparison.InvariantCultureIgnoreCase) :
                                                            property.GetCustomAttribute<OptionAttribute>().keyName.Any(n => n.Equals(m, StringComparison.InvariantCultureIgnoreCase)));

            var value = ConfigurationManager.AppSettings.Get(name);

            if (!value.Equals(String.Empty))
            {
                property.SetValue(instance, Convert.ChangeType(value, property.PropertyType));
            }
        }

        return instance;
    }

    public T Value
    {
        get
        {
            return model;
        }
    }
}

var container = new Container();

container.RegisterMvcControllers(Assembly.GetExecutingAssembly());

//Injection form Web.config settings to Option Model  
container.Register<IOptions<SecretOptions>, Options<SecretOptions>>(SimpleInjector.Lifestyle.Singleton);

DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));