using System.Collections.Generic;
using System.Linq;
using Simple.Data;namespace INetFang.Helper
{/// <summary>/// Simple Data操作通用类 作者:Fang/// http://simplefx.org/simpledata/docs/index.html/// </summary>/// <typeparam name="T">Table Model</typeparam>public class SimpleManager<T>{private readonly dynamic _db = DataBaseHelper.Open();private string TableName { get; set; }public SimpleManager(){TableName = typeof (T).Name;}/// <summary>/// 表的名称/// </summary>/// <param name="tableName"></param>public SimpleManager(string tableName){TableName = tableName;}public dynamic Db(){return _db[TableName];}#region Exists/// <summary>/// 判断是否存在/// </summary>/// <param name="column"></param>/// <param name="value"></param>/// <returns></returns>public bool Exists(string column, dynamic value){return Db().Exists(Db()[column] == value);}/// <summary>/// 例子:/// var e1 = new SimpleExpression(Db()["Id"], 5, SimpleExpressionType.Equal);/// var e2 = new SimpleExpression(Db()["Url"], "2", SimpleExpressionType.Equal);/// bool exi = Exists(e1 && e2)/// /// bool exi = Exists(Db()["Id"]==5 && Db()["Url"]==2)/// </summary>/// <param name="criteria">表达式</param>/// <returns></returns>public bool Exists(SimpleExpression criteria){return Db().Exists(criteria);}#endregion#region Insert/// <summary>/// 增加/// </summary>/// <param name="model">实体对象</param>/// <returns></returns>public T Insert(T model){return Db().Insert(model);}/// <summary>/// 批量增加/// </summary>/// <param name="models">实体对象集合</param>/// <returns></returns>public List<T> Insert(List<T> models){return Db().Insert(models).ToList<T>();}#endregion#region Update/// <summary>/// 根据主键修改/// </summary>/// <param name="model">实体对象</param>/// <returns>bool值,判断是否操作成功</returns>public bool Update(T model){return Db().Update(model) > 0;}#endregion#region Delete/// <summary>/// 删除/// </summary>/// <param name="id">Id</param>/// <returns>bool值,判断是否操作成功</returns>public bool Delete(dynamic id){return Db().DeleteById(id) > 0;}/// <summary>/// 批量删除/// </summary>/// <param name="ids">Id集合</param>/// <returns>bool值,判断是否操作成功</returns>public bool DeleteBatch(dynamic ids){return Db().DeleteById(ids) > 0;}public bool DeleteBatch(string idstring){returnDb().DeleteById(idstring.Split(',').Where(str => !string.IsNullOrEmpty(str)).Cast<dynamic>().ToArray()) >0;}/// <summary>/// 删除全部/// </summary>/// <returns>bool值,判断是否操作成功</returns>public bool DeleteAll(){return Db().DeleteAll() > 0;}#endregion#region Find/// <summary>/// 获取最大值/// </summary>/// <param name="column">列名</param>/// <returns></returns>public int GetMaxBy(string column){return Db().Select(Db()[column].Max()).ToScalarOrDefault();}/// <summary>/// 记录数量/// </summary>/// <returns></returns>public int GetCount(){return Db().GetCount();}public dynamic GetCount(SimpleExpression strWhere){return Db().GetCount(strWhere);}/// <summary>/// 查询全部/// </summary>/// <returns>实体类对象集合</returns>public List<T> FindAll(){return Db().All().ToList<T>();}/// <summary>/// 通过Id查询/// </summary>/// <param name="id">主键Id</param>/// <returns>实体类对象集合</returns>public List<T> FindAllById(dynamic id){return Db().FindAllById(id);}/// <summary>/// 通过Id查询/// </summary>/// <param name="id">主键Id</param>/// <returns>实体类对象</returns>public T FindById(dynamic id){return Db().FindAllById(id).FirstOrDefault();}/// <summary>/// 通过表达式查询/// </summary>/// <param name="criteria">表达式</param>/// <returns>实体类对象集合</returns>public List<T> FindAll(SimpleExpression criteria){return Db().FindAll(criteria).ToList<T>();}public List<T> FindAll(SimpleExpression criteria, string filedOrder){return Db().FindAll(criteria).OrderBy(Db()[filedOrder]).ToList<T>();}/// <summary>/// 获得前几行数据/// </summary>public List<T> FindAll(int top, SimpleExpression criteria, string filedOrder){return Db().FindAll(criteria).OrderBy(Db()[filedOrder]).Take(top).ToList<List<T>>();}/// <summary>/// 通过通过表达式查询查询/// </summary>/// <param name="criteria">表达式</param>/// <returns>实体类对象</returns>public T Find(SimpleExpression criteria){return Db().FindAll(criteria).FirstOrDefault();}/// <summary>/// 分页/// </summary>/// <param name="pageIndex">第几页</param>/// <param name="pageCount">每页总数</param>/// <param name="criteria">条件表达式</param>/// <param name="orderby"></param>/// <returns></returns>public List<T> FindAll(int pageIndex, int pageCount, SimpleExpression criteria, string orderby){return Db().FindAll(criteria).OrderBy(Db()[orderby]).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList<T>();}public List<T> FindAll(int pageIndex, int pageCount, SimpleExpression criteria, string orderby, out Promise<int> count){return Db().FindAll(criteria).OrderBy(Db()[orderby]).WithTotalCount(out count).Skip((pageIndex - 1) * pageCount).Take(pageCount).ToList<T>();}#endregion/*//事务案例* using (var transaction = database.BeginTransaction()){transaction.Users.Insert(Name: "Steve", Age: 50);transaction.Commit();}*/}
}