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  • 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;
            }
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  • 原文地址:https://www.cnblogs.com/nepulgh/p/6702348.html
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