将泛类型集合List类转换成DataTable

        /// <summary>        /// 将泛类型集合List类转换成DataTable        /// </summary>        /// <param name="list">泛类型集合</param>        /// <returns></returns>        public DataTable ListToDataTable<T>(List<T> entitys)        {            //检查实体集合不能为空            if (entitys == null || entitys.Count < 1)            {                throw new Exception("需转换的集合为空");            }            //取出第一个实体的所有Propertie            Type entityType = entitys[0].GetType();            PropertyInfo[] entityProperties = entityType.GetProperties();

            //生成DataTable的structure            //生产代码中，应将生成的DataTable结构Cache起来，此处略            DataTable dt = new DataTable();            for (int i = 0; i < entityProperties.Length; i++)            {                //dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType);                dt.Columns.Add(entityProperties[i].Name);            }            //将所有entity添加到DataTable中            foreach (object entity in entitys)            {                //检查所有的的实体都为同一类型                if (entity.GetType() != entityType)                {                    throw new Exception("要转换的集合元素类型不一致");                }                object[] entityValues = new object[entityProperties.Length];                for (int i = 0; i < entityProperties.Length; i++)                {                    entityValues[i] = entityProperties[i].GetValue(entity, null);                }                dt.Rows.Add(entityValues);            }            return dt;        }