DataTable转换List List转换Datable

 

/// <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