Solved

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

Posted on 2012-03-12
3
495 Views
Last Modified: 2012-03-12
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;
            }

        }
    }
}

Open in new window


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();
        }
    }

}

Open in new window


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?
0
Comment
Question by:programmerist
  • 2
3 Comments
 
LVL 3

Expert Comment

by:zofcentr
ID: 37709042
Is missing assembly file inside BIN directory of calling assembly (this one which is dynamically loading assemblies).
As you do not add references then normally it is not copied during build operation.
Check whether file exists and has correct version.

Other solution is to register it in GAC.
0
 

Author Comment

by:programmerist
ID: 37709261
do you have any professional answer? with code and technical help
0
 
LVL 3

Accepted Solution

by:
zofcentr earned 500 total points
ID: 37709519
I am not sure whether you comment was ironic and rude or not?
But I will try one more time.
Code of what ? It does not look that there is problem wit hcode.
I can not deliver code except some scripts to register assembly in GAC see under this link.

http://msdn.microsoft.com/en-us/library/ex0ss12c%28v=vs.80%29.aspx

Script for copying file I think is not needed ?
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

ASP.Net to Oracle Connectivity Recently I had to develop an ASP.NET application connecting to an Oracle database.As I am doing it first time ,I had to solve several problems. This article will help to such developers  to develop an ASP.NET client…
Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
Delivering innovative fully-managed cloud services for mission-critical applications requires expertise in multiple areas plus vision and commitment. Meet a few of the people behind the quality services of Concerto.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

947 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now