/// <summary> /// 将数据实体对应的记录从数据库表中删除。 /// </summary> /// <example> /// <para>下面的代码演示了Delete()方法的用法</para> /// <code> /// //Contract类需要继承自BaseEntity,并且需要放在以*.Entity.dll结尾的程序集中 /// Contract contract = new Contract(); /// /// //对主键字段进行赋值 /// contract.ContractGUID = Request.QueryString["ContractGUID"]; /// /// int count = contract.Delete(); /// //删除成功后,count等于1 /// </code> /// </example> /// <exception cref="InvalidOperationException">类没有定义主键,即没有任何一个属性被标记为PrimaryKey=true,则抛出此异常</exception> /// <exception cref="InvalidProgramException">如果数据实体类型的定义不符合规范,就会抛出此异常</exception> /// <returns>返回ADO.NET的原始结果</returns> public virtual int Delete() { CPQuery query = GetCPQuery(4, new object[] { this }); if (_funcBefore != null) { if (_funcBefore(query) == false) { return(-1); } } return(query.ExecuteNonQuery()); }
/// <summary> /// 更新数据实体对应的记录。 /// </summary> /// <example> /// <para>下面的代码演示了Update()方法的用法</para> /// <code> /// //Contract类需要继承自BaseEntity,并且需要放在以*.Entity.dll结尾的程序集中 /// Contract contract = new Contract(); /// /// //为类的主键赋值 /// contract.ContractGUID = Reuqest.QueryString["ContractGUID"]; /// /// //为类的其他字段赋值 /// //contract.ContractName = Request.Form["ContractName"]; /// //... /// /// int count = contract.Update(); /// //更新成功后,count等于1 /// </code> /// </example> /// <exception cref="InvalidProgramException">如果数据实体类型的定义不符合规范,就会抛出此异常</exception> /// <exception cref="InvalidOperationException">类没有定义主键,即没有任何一个属性被标记为PrimaryKey=true,则抛出此异常</exception> /// <returns>返回ADO.NET的原始结果</returns> public virtual int Update() { CPQuery query = GetCPQuery(7, new object[] { this, bakObject }); if (query == null) { return(0); } if (_funcBefore != null) { if (_funcBefore(query) == false) { return(-1); } } return(query.ExecuteNonQuery()); }
/// <summary> /// 将数据实体插到对应的数据库表中。 /// </summary> /// <example> /// <para>下面的代码演示了Insert()方法的用法</para> /// <code> /// //Contract类需要继承自BaseEntity,并且需要放在以*.Entity.dll结尾的程序集中 /// Contract contract = new Contract(); /// /// contract.ContractGUID = Guid.NewGuid(); /// contract.ContractName = "..."; /// //...其他字段 /// /// int count = contract.Insert(); /// //插入成功后,count等于1 /// </code> /// </example> /// <exception cref="InvalidOperationException">1.如果没有对实体类的任何一个字段赋值,就进行Insert()操作,则会抛出此异常2.类没有定义主键,即没有任何一个属性被标记为PrimaryKey=true,则抛出此异常</exception> /// <exception cref="InvalidProgramException">如果数据实体类型的定义不符合规范,就会抛出此异常</exception> /// <returns>返回ADO.NET的原始结果</returns> public virtual int Insert() { CPQuery query = GetCPQuery(3, new object[] { this }); if (query == null) { throw new InvalidOperationException("传入对象不能生成有效的SQL语句。"); } if (_funcBefore != null) { if (_funcBefore(query) == false) { return(-1); } } return(query.ExecuteNonQuery()); }
/// <summary> /// 用并发检测的方式,更新数据实体对应的记录。 /// </summary> /// <example> /// <para>下面的代码演示了并发检测模式下,Update()方法的用法</para> /// <code> /// <![CDATA[ /// //Contract类需要继承自BaseEntity,并且需要放在以*.Entity.dll结尾的程序集中 /// /// public void Load(){ /// /// //在页面加载时,查询数据库信息,时间戳字段需要通过CAST转换为长整型,绑定到界面中 /// Contract contract = CPQuery.From("SELECT ContractGUID, CAST(ContractVersion AS BigInt) ContractVersion .... FROM cb_Contract WHERE ...").ToSingle<Contract>(); /// /// //其他数据绑定代码 /// //... /// } /// /// public void Update(string dataXML, long contractVersion){ /// //将AppFrom的xml直接转换为实体对象 /// Contract contract = XmlDataEntity.ConvertXmlToSingle<CbContract>(dataXML) /// /// //构造用于并发检测的原对象 /// Contract origContract = new Contract(); /// origContract.ContractGUID = contract.ContractGUID; //并发检测时,原对象的主键是必须提供的 /// contract.ContractVersion = contractVersion.Int64ToTimeStamp(); //界面中长整型的时间戳字段可以通过Int64ToTimeStamp扩展方法转换为byte[]数组 /// /// try{ /// //根据时间戳字段,进行并发检测 /// int count = contract.Update(origContract, ConcurrencyMode.TimeStamp); /// //如果更新成功,则count为1 /// /// //根据原始值,进行并发检测 /// //count = contract.Update(origContract, ConcurrencyMode.OriginalValue); /// } /// catch(OptimisticConcurrencyException ex){ /// //并发检测失败,将会抛出OptimisticConcurrencyException异常 /// } /// } /// ]]> /// </code> /// </example> /// <param name="original">用于并发检测的原始对象</param> /// <param name="concurrencyMode">并发检测模式</param> /// <exception cref="InvalidProgramException">如果数据实体类型的定义不符合规范,就会抛出此异常</exception> /// <exception cref="InvalidOperationException">类没有定义主键,即没有任何一个属性被标记为PrimaryKey=true,则抛出此异常</exception> /// <exception cref="ArgumentException">用于并发检测的原始对象不能是当前对象</exception> /// <exception cref="Hack.Fast.Extensions.Exception.OptimisticConcurrencyException">并发检测失败时,则会抛出此异常</exception> /// <returns>返回ADO.NET的原始结果</returns> public virtual int Update(BaseEntity original, ConcurrencyMode concurrencyMode) { if (original == null) { throw new ArgumentNullException("original"); } if (concurrencyMode == ConcurrencyMode.OriginalValue && object.ReferenceEquals(this, original)) { throw new ArgumentException("用于并发检测的原始对象不能是当前对象。"); } int flag = concurrencyMode == ConcurrencyMode.TimeStamp ? 8 : 9; CPQuery query = GetCPQuery(flag, new object[] { this, original, bakObject }); if (query == null) { return(0); } if (_funcBefore != null) { if (_funcBefore(query) == false) { return(-1); } } int effectRows = query.ExecuteNonQuery(); if (effectRows == 0) { throw new Hack.Fast.Extensions.OptimisticConcurrencyException( "并发操作失败,本次操作没有更新任何记录,请确认当前数据行没有被其他用户更新或删除。"); } return(effectRows); }
/// <summary> /// 用并发检测的方式,将数据实体对应的记录从数据库表中删除。 /// </summary> /// <example> /// <para>下面的代码演示了并发检测模式下,Delete()方法的用法</para> /// <code> /// <![CDATA[ /// //Contract类需要继承自BaseEntity,并且需要放在以*.Entity.dll结尾的程序集中 /// /// public void Load(){ /// /// //在页面加载时,查询数据库信息,时间戳字段需要通过CAST转换为长整型,绑定到界面中 /// Contract contract = CPQuery.From("SELECT ContractGUID, CAST(ContractVersion AS BigInt) ContractVersion .... FROM cb_Contract WHERE ...").ToSingle<Contract>(); /// /// //其他数据绑定代码 /// //... /// } /// /// //删除通道,前端需要传递合同GUID,时间戳字段 /// public void Delete(Guid contractGUID, long contractVersion){ /// /// //删除动作,需要构建一个实体对象 /// Contract contract = new Contract(); /// contract.ContractGUID = contractGUID; //主键必须赋值,这是删除语句的首要条件 /// contract.ContractVersion = contractVersion.Int64ToTimeStamp(); //界面中长整型的时间戳字段可以通过Int64ToTimeStamp扩展方法转换为byte[]数组 /// /// try{ /// //根据时间戳字段,进行并发检测 /// int count = contract.Delete(ConcurrencyMode.TimeStamp); /// //如果删除成功,则count为1 /// /// //根据原始值,进行并发检测 /// //count = contract.Delete(oldContract, ConcurrencyMode.OriginalValue); /// } /// catch(OptimisticConcurrencyException ex){ /// //并发检测失败,将会抛出OptimisticConcurrencyException异常 /// } /// } /// ]]> /// </code> /// </example> /// <exception cref="InvalidProgramException">如果数据实体类型的定义不符合规范,就会抛出此异常</exception> /// <exception cref="InvalidOperationException">类没有定义主键,即没有任何一个属性被标记为PrimaryKey=true,则抛出此异常</exception> /// <exception cref="Hack.Fast.Extensions.Exception.OptimisticConcurrencyException">并发检测失败时,则会抛出此异常</exception> /// <param name="concurrencyMode">并发检测模式</param> /// <returns>返回ADO.NET的原始结果</returns> public virtual int Delete(ConcurrencyMode concurrencyMode) { int flag = concurrencyMode == ConcurrencyMode.TimeStamp ? 5 : 6; CPQuery query = GetCPQuery(flag, new object[] { this }); if (_funcBefore != null) { if (_funcBefore(query) == false) { return(-1); } } int effectRows = query.ExecuteNonQuery(); if (effectRows == 0) { throw new Hack.Fast.Extensions.OptimisticConcurrencyException( "并发操作失败,本次操作没有删除任何记录,请确认当前数据行没有被其他用户更新或删除。"); } return(effectRows); }