使用Assembly生成带参数的泛型实例

public class DataAccess<T>
{
        protected static readonly string _path = ConfigurationSettings.AppSettings["WebDAL"];

        public static IDAL.ITreeTable<T> CreatTreeTable(string tableName, string idName, string parentIdName, string displayOrderName)
        {
            if (string.IsNullOrEmpty(tableName) || string.IsNullOrEmpty(idName) || string.IsNullOrEmpty(parentIdName))
                throw new Exception("tableName,idName,parentIdName,displayOrder必须设置.");

            string className = _path + ".TreeTable`1[[" + typeof(T).FullName + "," + typeof(T).Assembly.ToString() + "]]";
            Assembly assembly = Assembly.Load(_path);
            Type t = assembly.GetType(className);
            object[] args = new object[4];
            args[0] = tableName;
            args[1] = idName;
            args[2] = parentIdName;
            args[3] = displayOrderName;
            return (IDAL.ITreeTable<T>)Activator.CreateInstance(t, args);
        }
}