DataTable转换List List转换Datable

 DataTable与List<T>相互转换

Expression构建DataTable to Entity 映射委托

优化DataTable 转 ListList 

winfrom DataSet和实体类的相互转换

/// <summary>
        /// List 转 DataTable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="entitys"></param>
        /// <returns></returns>
        public static 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;
        }

调用测试：

  List<WorkRateData> list = new WorkRate().WorkAll("05,06", "2013-01-01", "2013-01-31");//获取泛型数据
  DataTable dt = ListToDataTable<WorkRateData>(list);//泛型转Datatable

 

C# DataTable 转 List(大家进来讨论讨论)