C# DataTable、实体相互转换

    public static T GetEntity<T>(DataTable table) where T : new()
    {
        T entity = new T();
        foreach (DataRow row in table.Rows)
        {
            foreach (var item in entity.GetType().GetProperties())
            {
                if (row.Table.Columns.Contains(item.Name))
                {
                    if (DBNull.Value != row[item.Name])
                    {
                        item.SetValue(entity, Convert.ChangeType(row[item.Name], item.PropertyType), null);
                    }

                }
            }
        }

        return entity;
    }

    public static IList<T> GetEntities<T>(DataTable table) where T : new()
    {
        IList<T> entities = new List<T>();
        foreach (DataRow row in table.Rows)
        {
            T entity = new T();
            foreach (var item in entity.GetType().GetProperties())
            {
                item.SetValue(entity, Convert.ChangeType(row[item.Name], item.PropertyType), null);
            }
            entities.Add(entity);
        }
        return entities;
    }

　　　　 /// <summary>
        /// 实体类转换成DataTable
        /// </summary>
        /// <param name="modelList">实体类列表</param>
        /// <returns></returns>
        public DataTable GetDataTable(List<T> modelList)
        {
            if (modelList == null || modelList.Count == 0)
            {
                return null;
            }
            DataTable dt = CreateData(modelList[0]);

            foreach(T model in modelList)
            {
                DataRow dataRow = dt.NewRow();
                foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
                {
                    dataRow[propertyInfo.Name] = propertyInfo.GetValue(model, null);
                }
                dt.Rows.Add(dataRow);
            }
            return dt;
        }

        /// <summary>
        /// 根据实体类得到表结构
        /// </summary>
        /// <param name="model">实体类</param>
        /// <returns></returns>
        private DataTable CreateDataTable(T model)
        {
            DataTable dataTable = new DataTable(typeof (T).Name);
            foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
            {
                dataTable.Columns.Add(new DataColumn(propertyInfo.Name, propertyInfo.PropertyType));
            }
            return dataTable;
        }