C#将DataTable转换成单个T实体和List<T>集合

        /// 获得单个实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static T Entity<T>(DataTable dt)
        {
            if (dt == null || dt.Rows.Count == 0)
            {
                return default(T);
            }
            T entity = default(T);
            foreach (DataRow dr in dt.Rows)
            {
                entity = Activator.CreateInstance<T>();
                PropertyInfo[] pis = entity.GetType().GetProperties();
                foreach (PropertyInfo pi in pis)
                {
                    if (dt.Columns.Contains(pi.Name))
                    {
                        if (!pi.CanWrite)
                        {
                            continue;
                        }
                        if (dr[pi.Name] != DBNull.Value)
                        {
                            Type t = pi.PropertyType;
                            //if (t.FullName == "System.Guid")
                            //{
                            //    pi.SetValue(entity, Guid.Parse(dr[pi.Name].ToString()), null);
                            //}
                            //else
                            //{
                            pi.SetValue(entity, dr[pi.Name], null);
                            //}
                        }
                    }
                }
            }
            return entity;
        }
        /// <summary>
        /// 获得集合实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static List<T> EntityList<T>(DataTable dt)
        {
            if (dt == null || dt.Rows.Count == 0)
            {
                return null;
            }
            List<T> list = new List<T>();
            T entity = default(T);
            foreach (DataRow dr in dt.Rows)
            {
                entity = Activator.CreateInstance<T>();
                PropertyInfo[] pis = entity.GetType().GetProperties();
                foreach (PropertyInfo pi in pis)
                {
                    if (dt.Columns.Contains(pi.Name))
                    {
                        if (!pi.CanWrite)
                        {
                            continue;
                        }
                        if (dr[pi.Name] != DBNull.Value)
                        {
                            Type t = pi.PropertyType;
                            if (t.FullName == "System.Guid")
                            {
                                pi.SetValue(entity, Guid.Parse(dr[pi.Name].ToString()), null);
                            }
                            else
                            {
                                pi.SetValue(entity, dr[pi.Name], null);
                            }
                        }
                    }
                }
                list.Add(entity);
            }
            return list;
        }