Attribute Util : Attribute « XML « C# / C Sharp

1. C# / C Sharp
2. XML
3. Attribute

Attribute Util

 

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Linq;

internal class AttributedTypesUtility
{
    internal static List<Type> GetTypesWithAttribute(Type attributeType)
    {
        var typesWithAttribute = new List<Type>();
        Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();

        foreach (Assembly assembly in assemblies)
        {
            IEnumerable<Type> typesWithAttributeInAssembly = GetTypesWithAttributeInAssembly(assembly, attributeType);
            typesWithAttribute.AddRange(typesWithAttributeInAssembly);
        }

        return typesWithAttribute;
    }

    private static IEnumerable<Type> GetTypesWithAttributeInAssembly(Assembly assembly, Type attributeType)
    {
        Type[] types = assembly.GetTypes();
        return types.Where(type => TypeHasAttribute(type, attributeType)).ToList();
    }

    private static bool TypeHasAttribute(Type type, Type attributeType)
    {
        bool typeHasAttribute = false;
        object[] attributes = GetAttributes(type);

        foreach (object attribute in attributes)
        {
            if (attributeType.IsAssignableFrom(attribute.GetType()))
                typeHasAttribute = true;
        }

        return typeHasAttribute;
    }

    private static object[] GetAttributes(Type type)
    {
        return type.GetCustomAttributes(true); ;
    }

    internal static Attribute GetAttribute(Type type, Type attributeType)
    {
        Attribute attribute = null;

        object[] attributes = type.GetCustomAttributes(true);
        foreach (object attributeInType in attributes)
        {
            if (attributeType.IsAssignableFrom(attributeInType.GetType()))
                attribute = (Attribute)attributeInType;
        }

        return attribute;
    }
}

   
  

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