List和DataTable互转

    /// <summary>
    /// List和DataTable互转
    /// </summary>
    static class ListUtility
    {

        /// <summary>
        /// 将List转换成DataTable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <returns></returns>
        public static DataTable ListToDataTable<T>(this IList<T> data, string strTableName = "")
        {
            try
            {
                PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
                DataTable dtReturn = new DataTable(strTableName);
                for (int i = 0; i < properties.Count; i++)
                {
                    PropertyDescriptor property = properties[i];
                    dtReturn.Columns.Add(property.Name, property.PropertyType);
                }
                object[] values = new object[properties.Count];
                foreach (T item in data)
                {
                    for (int i = 0; i < values.Length; i++)
                    {
                        values[i] = properties[i].GetValue(item);
                    }
                    dtReturn.Rows.Add(values);
                }
                return dtReturn;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }


        /// <summary>
        /// 获得集合实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static List<T> DataTableToList<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, dr[pi.Name].ToString(), null);
                            }
                            else
                            {
                                pi.SetValue(entity, dr[pi.Name], null);
                            }

                        }
                    }
                }
                list.Add(entity);
            }
            return list;
        }
    }