using System;
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using System.Collections.Generic;
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using System.Linq.Expressions;
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namespace HH.WCS.Mobox3.Template.Util.Helper
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{
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/// <summary>
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/// 数据库连接帮助类
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/// </summary>
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public static class AdoSqlHelper<T> where T : class, new()
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{
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/// <summary>
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/// 根据条件查询一条数据
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/// </summary>
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/// <param name="condition">条件</param>
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/// <returns></returns>
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public static T QueryFirst(Expression<Func<T,bool>> condition)
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{
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var db = new SqlHelper<object>().GetInstance();
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// 返回数据
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return db.Queryable<T>().First(condition);
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}
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/// <summary>
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/// 根据条件查询多条数据
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/// </summary>
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/// <param name="condition"></param>
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public static List<T> QueryList(Expression<Func<T, bool>> condition)
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{
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var db = new SqlHelper<object>().GetInstance();
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// 返回数据
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return db.Queryable<T>().Where(condition).ToList();
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}
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/// <summary>
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/// 根据条件查询对应数据数量
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/// </summary>
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/// <param name="condition">条件</param>
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/// <returns></returns>
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public static int QueryCount(Expression<Func<T,bool>> condition)
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{
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var db = new SqlHelper<object>().GetInstance();
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// 返回数据
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return db.Queryable<T>().Count(condition);
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}
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/// <summary>
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/// 根据条件修改一条数据
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/// </summary>
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/// <param name="model">需要进行修改的对象</param>
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/// <param name="condition">修改条件</param>
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/// <returns></returns>
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public static bool UpdateFirst(T model, Expression<Func<T, object>> condition)
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{
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var db = new SqlHelper<object>().GetInstance();
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// 修改数据
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var executeCommand = db.Updateable(model).UpdateColumns(condition).ExecuteCommand();
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if (executeCommand > 0)
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{
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return true;
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}
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else
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return false;
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}
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/// <summary>
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/// 根据条件修改多条数据
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/// </summary>
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/// <param name="models"></param>
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/// <param name="condition"></param>
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/// <returns></returns>
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public static int UpdateList(List<T> models, Expression<Func<T, object>> condition)
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{
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var db = new SqlHelper<object>().GetInstance();
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// 修改数据
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return db.Updateable(models).UpdateColumns(condition).ExecuteCommand();
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}
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/// <summary>
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/// 新增一条数据
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/// </summary>
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/// <param name="model"></param>
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/// <returns></returns>
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public static bool AddFirst(T model)
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{
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var db = new SqlHelper<object>().GetInstance();
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var executeCommand = db.Insertable(model).ExecuteCommand();
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if (executeCommand > 0)
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return true;
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else
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return false;
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}
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/// <summary>
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/// 新增多条数据
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/// </summary>
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/// <param name="models"></param>
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/// <returns></returns>
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public static int AddList(List<T> models)
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{
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var db = new SqlHelper<object>().GetInstance();
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var executeCommand = db.Insertable(models).ExecuteCommand();
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return executeCommand;
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}
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/// <summary>
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/// 删除一条数据
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/// </summary>
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/// <param name="model">需要删除的对象</param>
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/// <returns></returns>
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public static bool DeleteFirst(T model)
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{
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var db = new SqlHelper<object>().GetInstance();
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var executeCommand = db.Deleteable(model).ExecuteCommand();
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if (executeCommand > 0)
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return true;
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else
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return false;
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}
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/// <summary>
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/// 删除多条数据
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/// </summary>
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/// <param name="models">需要删除的对象集合</param>
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/// <returns></returns>
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public static int DeleteList(List<T> models)
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{
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var db = new SqlHelper<object>().GetInstance();
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return db.Deleteable(models).ExecuteCommand();
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}
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/// <summary>
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/// 根据条件删除数据
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/// </summary>
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/// <param name="condition">条件</param>
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/// <returns></returns>
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public static int DeleteList(Expression<Func<T, bool>> condition)
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{
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var db = new SqlHelper<object>().GetInstance();
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return db.Deleteable<T>().Where(condition).ExecuteCommand();
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}
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/// <summary>
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/// 按照时间倒序查询
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/// </summary>
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/// <param name="condition"></param>
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/// <param name="orderBy"></param>
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/// <returns></returns>
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public static T QueryFirstByDecs(Expression<Func<T, bool>> condition, Expression<Func<T, object>> orderBy)
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{
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var db = new SqlHelper<object>().GetInstance();
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// 返回数据
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return db.Queryable<T>().OrderByDescending(orderBy).First(condition);
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}
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}
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}
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