Retrieve a list of Types from an external assembly, implementing a given T type (class or interface). - CSharp System.Reflection

CSharp examples for System.Reflection:Assembly

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Description

Retrieve a list of Types from an external assembly, implementing a given T type (class or interface).

Demo Code


using System.Reflection;
using System.Linq;
using System.IO;//w w  w.ja  va2 s .co  m
using System.Collections.Generic;
using System;

public class Main{
        /// <summary>
        /// Retrieve a list of <c>Type</c>s from an external assembly, implementing a given <c>T</c> type (class or interface).
        /// </summary>
        /// <typeparam name="T">Type to be searched.</typeparam>
        /// <param name="assemblyFileName">Path and filename to the assembly.</param>
        /// <returns>A list of <c>Type</c> implementing <typeparamref name="T"/>.</returns>
        public static List<Type> GetTypesByInterface<T>(string assemblyFileName)
        {
            if (assemblyFileName.EndsWith(".dll", StringComparison.OrdinalIgnoreCase))
            {
                assemblyFileName = Path.GetFileNameWithoutExtension(assemblyFileName);
            }
            var assembly = Assembly.Load(new AssemblyName(assemblyFileName));
            var typeInfo = typeof(T).GetTypeInfo();

            return assembly.ExportedTypes
                .Where(t => t.GetTypeInfo().IsAssignableFrom(typeInfo))
                .ToList();
        }
}

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