本文实例讲述了C#实现动态加载dll的方法。分享给大家供大家参考。具体实现方法如下：

using System;

using System.Collections.Generic;

using System.Text;

using System.Reflection;

using System.IO;

namespace Alif.CommonAPI.DynamicLoadAssembly

{

    public class AssemblyDynamicLoader<T>

    {

        private AppDomain appDomain;
        private DynamicRemoteLoadAssembly<T> remoteLoader;
        public T InvokeMethod(string assemblyName, string assemblyPath, string assemblyConfigFilePath, string fullClassName, string methodName, params object[] args)

        {

            AppDomainSetup setup = new AppDomainSetup();

            setup.ApplicationName = "ApplicationLoader";

            setup.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory + @"bin\";

            //setup.PrivateBinPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "private");

            setup.CachePath = setup.ApplicationBase;

            setup.ShadowCopyFiles = "true";

            if (assemblyConfigFilePath != string.Empty)

            {

                setup.ConfigurationFile = AppDomain.CurrentDomain.BaseDirectory + assemblyConfigFilePath;

            }

            setup.ShadowCopyDirectories = setup.ApplicationBase;

            setup.LoaderOptimization = LoaderOptimization.SingleDomain;
            this.appDomain = AppDomain.CreateDomain("ApplicationLoaderDomain", null, setup);

            String name = Assembly.GetExecutingAssembly().GetName().FullName;
            this.remoteLoader = (DynamicRemoteLoadAssembly<T>)this.appDomain.CreateInstanceAndUnwrap(name, typeof(DynamicRemoteLoadAssembly<T>).FullName);
            assemblyName = AppDomain.CurrentDomain.BaseDirectory + assemblyPath + assemblyName;
            return this.remoteLoader.InvokeMethod(assemblyName, fullClassName, methodName, args);

        }
        /// <summary>

        /// 

        /// </summary>

        public void Unload()

        {

            try

            {

                AppDomain.Unload(this.appDomain);

                this.appDomain = null;

            }

            catch (CannotUnloadAppDomainException ex)

            {
            }

        }

    }

}

using System;

using System.Collections.Generic;

using System.Text;

using System.Reflection;

using System.Globalization;

namespace Alif.CommonAPI.DynamicLoadAssembly

{

    public class DynamicRemoteLoadAssembly<T> : MarshalByRefObject

    {

        private Assembly assembly = null;
        public T InvokeMethod(string assemblyPath, string fullClassName, string methodName, params object[] args)

        {

            this.assembly = null;

            T result = default(T);

            try

            {

                this.assembly = Assembly.LoadFile(assemblyPath);

                Type pgmType = null;

                if (this.assembly != null)

                {

                    pgmType = this.assembly.GetType(fullClassName, true, true);

                }

                else

                {

                    pgmType = Type.GetType(fullClassName, true, true);

                }

                BindingFlags defaultBinding = BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.IgnoreCase | BindingFlags.InvokeMethod | BindingFlags.Static;

                CultureInfo cultureInfo = new CultureInfo("es-ES", false);

                try

                {

                    MethodInfo methisInfo = assembly.GetType(fullClassName, true, true).GetMethod(methodName);
                    if (methisInfo == null)

                    {

                        new Exception("EMethod　does　not　exist!");

                    }
                    if (methisInfo.IsStatic)

                    {

                        if (methisInfo.GetParameters().Length == 0)

                        {

                            if (methisInfo.ReturnType == typeof(void))

                            {

                                pgmType.InvokeMember(methodName, defaultBinding, null, null, null, cultureInfo);

                            }

                            else

                            {

                                result = (T)pgmType.InvokeMember(methodName, defaultBinding, null, null, null, cultureInfo);

                            }

                        }

                        else

                        {

                            if (methisInfo.ReturnType == typeof(void))

                            {

                                pgmType.InvokeMember(methodName, defaultBinding, null, null, args, cultureInfo);

                            }
                            else

                            {

                                result = (T)pgmType.InvokeMember(methodName, defaultBinding, null, null, args, cultureInfo);

                            }

                        }

                    }

                    else

                    {
                        if (methisInfo.GetParameters().Length == 0)

                        {

                            object pgmClass = Activator.CreateInstance(pgmType);

                            if (methisInfo.ReturnType == typeof(void))

                            {

                                pgmType.InvokeMember(methodName, defaultBinding, null, pgmClass, null, cultureInfo);

                            }

                            else

                            {

                                result = (T)pgmType.InvokeMember(methodName, defaultBinding, null, pgmClass, null, cultureInfo);

                            }

                        }

                        else

                        {

                            object pgmClass = Activator.CreateInstance(pgmType);

                            if (methisInfo.ReturnType == typeof(void))

                            {

                                pgmType.InvokeMember(methodName, defaultBinding, null, pgmClass, args, cultureInfo);

                            }

                            else

                            {

                                result = (T)pgmType.InvokeMember(methodName, defaultBinding, null, pgmClass, args, cultureInfo);

                            }

                        }

                    }

                }

                catch (Exception e)

                {

                    result = (T)pgmType.InvokeMember(methodName, defaultBinding, null, null, null, cultureInfo);

                }

                return result;

            }

            catch (Exception ee)

            {

                return result;

            }

        }

    }

}

希望本文所述对大家的C#程序设计有所帮助。