获取指定名称DLL

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  private static Dictionary<string, IStatisticsService> LoadRealizationPlugins(string dllSearchPattern)
        {
            string path = AppDomain.CurrentDomain.BaseDirectory;
            Type tType = typeof(IStatisticsService);
            //获取当前运行目录下的所有dll
            string[] dlls = Directory.GetFiles(path+"bin/", dllSearchPattern + "*.dll", SearchOption.TopDirectoryOnly);
            Dictionary<string, IStatisticsService> results = new Dictionary<string, IStatisticsService>();
            IStatisticsService instance = null;
            foreach (var itemPath in dlls)
            {                
                //获取文件名称,以便查询是否按照[Plugins]开头的规则
                string fileName = Path.GetFileName(itemPath);
                try
                {
                    Assembly assem = Assembly.LoadFrom(itemPath);
                    Type[] types = assem.GetTypes();
                    foreach (var t in types)
                    {
                        //判断基类是否为T,如果是则创建插件
                        if (t.BaseType == tType || t.GetInterface(tType.Name, false) != null)
                        {
                            instance = (IStatisticsService)assem.CreateInstance(t.FullName);
                            if (instance == null)
                            {
                                continue;
                            }
                            if (!results.ContainsKey(instance.ControlName))
                            {
                                results.Add(instance.ControlName, instance);
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                   LogError("添加StatisticsCommonHandler.LoadRealizationPlugins异常: " + itemPath + " 异常:" + ex.Message, ex);
                }
            }
            return results;
        }