troubleshooting Question

how to use loaded DLLS assembly' methods which is referenced to another assembly?

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programmeristFlag for Afghanistan asked on
C#ASP.NETWCF
3 Comments1 Solution617 ViewsLast Modified:
i have 2 assemblies. i added classlib1 into classLib2 references. like that:
soru1
USAGE:

namespace ClassLibrary2
{
    public class Class1
    {
        public Class1()
        {

        }

        public int GetSum(int a , int b)
        {
            try
            {
                ClassLibrary1.Class1 ctx = new ClassLibrary1.Class1();
                return ctx.Sum(a, b);
            }
            catch
            {
                return -1;
            }

        }
    }
}

Also i want to load (class1lib and Class2Lib) another C# project dynamically by using AppDomain.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Reflection;
using System.Collections;
using System.Reflection.Emit;

namespace WcfService3
{
    public partial class Default : System.Web.UI.Page
    {
        public static ArrayList arryFiles { get; set; }
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            arryFiles = new ArrayList();
            List<byte[]> binaryList = new List<byte[]>();
            // string fileName = @"S:\Source\Yusuf.Karatoprak\plugin\ClassLibrary1.dll";
            DirSearch(@"S:\Source\Yusuf.Karatoprak\plugin");
            foreach (var filePath in arryFiles)
            {
                FileStream fileStream = File.OpenRead(filePath.ToString());
                byte[] buffer = new byte[fileStream.Length];
                fileStream.Read(buffer, 0, Convert.ToInt32(fileStream.Length));
                fileStream.Dispose();
                binaryList.Add(buffer);
                //Assembly[] assBefore = AppDomain.CurrentDomain.GetAssemblies();
              
                //AppDomain.CurrentDomain.Load(buffer);

                //Assembly[] assAfter = AppDomain.CurrentDomain.GetAssemblies();

                //Type t = Type.GetType("ClassLibrary1.Class1,ClassLibrary1");
            }

            new AssemblyLoader().LoadAndCall(binaryList);
        }
        static void DirSearch(string sDir)
        {
            try
            {
                foreach (string f in Directory.GetFiles(sDir, "*.dll"))
                {
                    if (!arryFiles.Contains(f))
                        arryFiles.Add(f);
                }
                foreach (string d in Directory.GetDirectories(sDir))
                {
                    if (d != null)
                    {
                        foreach (string f in Directory.GetFiles(d, "*.dll"))
                        {
                            if (!arryFiles.Contains(f))
                                arryFiles.Add(f);
                        }
                        DirSearch(d);
                    }
                    else
                        break;
                }

            }
            catch (System.Exception excpt)
            {
                throw new Exception(excpt.Message);

            }
        }
    }

    public class AssemblyLoader : MarshalByRefObject
    {
        public void LoadAndCall(List<byte[]> binaryList)
        {
            Assembly loadedAssembly=null;
            Assembly[] assBefore = AppDomain.CurrentDomain.GetAssemblies();
            foreach (byte[] binary in binaryList)
            {
                loadedAssembly = AppDomain.CurrentDomain.Load(binary);
                foreach (var assemblyName in loadedAssembly.GetReferencedAssemblies())
                    AppDomain.CurrentDomain.Load(assemblyName);
            }
            Assembly[] assAfter = AppDomain.CurrentDomain.GetAssemblies();
            object[] tt = { 3, 6 };
            Type type = loadedAssembly.GetType("ClassLibrary2.Class1");
            object loaded = loadedAssembly.CreateInstance("ClassLibrary2.Class1", true, BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance, null, new object[] { }, null, null);
           // object obj = Activator.CreateInstance(type);
            
          

            ObjectCreateMethod inv = new ObjectCreateMethod(type); //Specify Type
            Object obj = inv.CreateInstance();

            MethodInfo minfo = type.GetMethod("GetSum", BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance);
            int x = (int)minfo.Invoke(obj, new Object[] { 3, 6 });
            Console.WriteLine(x);
        }
    }

    public class ObjectCreateMethod
    {
        delegate object MethodInvoker();
        MethodInvoker methodHandler = null;

        public ObjectCreateMethod(Type type)
        {
            CreateMethod(type.GetConstructor(Type.EmptyTypes));
        }

        public ObjectCreateMethod(ConstructorInfo target)
        {
            CreateMethod(target);
        }

        void CreateMethod(ConstructorInfo target)
        {
            DynamicMethod dynamic = new DynamicMethod(string.Empty,
                        typeof(object),
                        new Type[0],
                        target.DeclaringType);
            ILGenerator il = dynamic.GetILGenerator();
            il.DeclareLocal(target.DeclaringType);
            il.Emit(OpCodes.Newobj, target);
            il.Emit(OpCodes.Stloc_0);
            il.Emit(OpCodes.Ldloc_0);
            il.Emit(OpCodes.Ret);

            methodHandler = (MethodInvoker)dynamic.CreateDelegate(typeof(MethodInvoker));
        }

        public object CreateInstance()
        {
            return methodHandler();
        }
    }

}

Why can not load and Exception error return to me:
GetSum method not working
innerexception not load classlib1
Look inner exception: Could not load file or assembly 'ClassLibrary1 But i loaded Classlib2 abd Classlib1 . class2 depends on classlib1 how to use classlib1 method i want to use GetSum(int a , int b) method after load assemblies?
ASKER CERTIFIED SOLUTION
zofcentr

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