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using System;
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using System.Collections;
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using BP.DA;
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namespace BP.En
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{
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/// <summary>
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/// 属性列表
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/// </summary>
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public class EntityOIDAttr
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{
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/// <summary>
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/// OID
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/// </summary>
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public const string OID = "OID";
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}
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/// <summary>
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/// 属性列表
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/// </summary>
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public class EntityOIDMyFileAttr : EntityOIDAttr
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{
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/// <summary>
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/// MyFileName
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/// </summary>
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public const string MyFileName = "MyFileName";
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/// <summary>
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/// MyFilePath
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/// </summary>
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public const string MyFilePath = "MyFilePath";
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/// <summary>
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/// MyFileExt
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/// </summary>
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public const string MyFileExt = "MyFileExt";
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}
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/// <summary>
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/// OID实体,只有一个实体这个实体只有一个主键属性。
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/// </summary>
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abstract public class EntityOID : Entity
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{
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#region 属性
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/// <summary>
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/// 是否是自动增长列
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/// </summary>
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public virtual bool IsInnKey
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{
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get
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{
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return false;
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}
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}
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/// <summary>
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/// 主键
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/// </summary>
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public override string PK
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{
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get
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{
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return "OID";
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}
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}
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/// <summary>
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/// OID, 如果是空的就返回 0 .
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/// </summary>
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public int OID
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{
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get
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{
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return this.GetValIntByKey(EntityOIDAttr.OID);
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}
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set
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{
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this.SetValByKey(EntityOIDAttr.OID, value);
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}
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}
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#endregion
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#region 构造函数
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/// <summary>
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/// 构造一个空实例
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/// </summary>
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protected EntityOID()
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{
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}
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/// <summary>
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/// 根据OID构造实体
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/// </summary>
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/// <param name="oid">oid</param>
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protected EntityOID(int oid)
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{
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this.SetValByKey(EntityOIDAttr.OID, oid);
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this.Retrieve();
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}
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#endregion
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#region override 方法
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public override int DirectInsert()
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{
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this.OID = DBAccess.GenerOID();
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return base.DirectInsert();
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}
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public void InsertAsNew()
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{
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this.OID = 0;
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this.Insert();
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}
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public override bool IsExits
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{
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get
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{
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if (this.OID == 0)
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return false;
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try
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{
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// 生成数据库判断语句。
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string selectSQL = "SELECT " + this.PKField + " FROM " + this.EnMap.PhysicsTable + " WHERE OID=" + this.HisDBVarStr + "v";
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Paras ens = new Paras();
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ens.Add("v", this.OID);
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// 从数据库里面查询，判断有没有。
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switch (this.EnMap.EnDBUrl.DBUrlType)
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{
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case DBUrlType.AppCenterDSN:
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return DBAccess.IsExits(selectSQL, ens);
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default:
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throw new Exception("没有设计到。" + this.EnMap.EnDBUrl.DBType);
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}
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}
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catch (Exception ex)
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{
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this.CheckPhysicsTable();
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throw ex;
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}
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/* DEL BY PENG 2008-04-27
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// 生成数据库判断语句。
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string selectSQL="SELECT "+this.PKField + " FROM "+ this.EnMap.PhysicsTable + " WHERE " ;
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switch(this.EnMap.EnDBUrl.DBType )
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{
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case DBType.MSSQL:
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selectSQL +=SqlBuilder.GetKeyConditionOfMS(this);
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break;
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case DBType.Access:
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selectSQL +=SqlBuilder.GetKeyConditionOfOLE(this);
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break;
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case DBType.Oracle:
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selectSQL +=SqlBuilder.GetKeyConditionOfOracle(this);
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break;
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default:
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throw new Exception("没有设计到。"+this.EnMap.EnDBUrl.DBType);
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}
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// 从数据库里面查询，判断有没有。
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switch(this.EnMap.EnDBUrl.DBUrlType )
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{
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case DBUrlType.AppCenterDSN:
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return DBAccess.IsExits( selectSQL) ;
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case DBUrlType.DBAccessOfMSSQL:
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return DBAccessOfMSSQL.IsExits( selectSQL) ;
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case DBUrlType.DBAccessOfOLE:
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return DBAccessOfOLE.IsExits( selectSQL) ;
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case DBUrlType.DBAccessOfOracle:
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return DBAccessOfOracle.IsExits( selectSQL) ;
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default:
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throw new Exception("没有设计到。"+this.EnMap.EnDBUrl.DBType);
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}
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*/
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}
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}
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/// <summary>
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/// 删除之前的操作。
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/// </summary>
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/// <returns></returns>
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protected override bool beforeDelete()
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{
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if (base.beforeDelete() == false)
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return false;
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try
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{
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if (this.OID < 0)
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throw new Exception("@实体[" + this.EnDesc + "]没有被实例化，不能Delete().");
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return true;
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}
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catch (Exception ex)
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{
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throw new Exception("@[" + this.EnDesc + "].beforeDelete err:" + ex.Message);
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}
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}
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protected override bool beforeUpdateInsertAction()
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{
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return base.beforeUpdateInsertAction();
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}
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/// <summary>
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/// beforeInsert 之前的操作。
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/// </summary>
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/// <returns></returns>
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protected override bool beforeInsert()
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{
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if (this.OID == -999)
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return base.beforeInsert();
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if (this.OID > 0)
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throw new Exception("@[" + this.ToString() + " - " + this.EnDesc + "], 实体已经被实例化 OID=[" + this.OID + "]，不能Insert.");
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if (this.IsInnKey)
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this.OID = -1;
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else
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this.OID = DBAccess.GenerOID();
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return base.beforeInsert();
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}
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/// <summary>
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/// beforeUpdate
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/// </summary>
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/// <returns></returns>
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protected override bool beforeUpdate()
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{
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if (base.beforeUpdate() == false)
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return false;
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/*
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if (this.OID <= 0 )
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throw new Exception("@实体["+this.EnDesc+"]没有被实例化，不能Update().");
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*/
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return true;
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}
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protected virtual string SerialKey
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{
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get
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{
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return "OID";
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}
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}
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#endregion
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#region public 方法
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/// <summary>
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/// 作为一个新的实体保存。
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/// </summary>
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public void SaveAsNew()
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{
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try
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{
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this.OID = DBAccess.GenerOIDByKey32(this.SerialKey);
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this.RunSQL(SqlBuilder.Insert(this));
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}
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catch (System.Exception ex)
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{
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this.CheckPhysicsTable();
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throw ex;
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}
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}
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/// <summary>
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/// 按照指定的OID Insert.
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/// </summary>
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public void InsertAsOID(int oid)
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{
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this.SetValByKey("OID", oid);
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try
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{
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this.RunSQL(SqlBuilder.Insert(this));
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}
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catch (Exception ex)
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{
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this.CheckPhysicsTable();
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throw ex;
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}
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}
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public void InsertAsOID(Int64 oid)
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{
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try
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{
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//先设置一个标记值，为的是不让其在[beforeInsert]产生oid.
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this.SetValByKey("OID", -999);
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//调用方法.
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this.beforeInsert();
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//设置主键.
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this.SetValByKey("OID", oid);
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this.RunSQL(SqlBuilder.Insert(this));
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this.afterInsert();
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}
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catch (Exception ex)
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{
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this.CheckPhysicsTable();
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throw ex;
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}
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}
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/// <summary>
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/// 按照指定的OID 保存
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/// </summary>
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/// <param name="oid"></param>
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public void SaveAsOID(int oid)
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{
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this.SetValByKey("OID", oid);
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if (this.Update() == 0)
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this.InsertAsOID(oid);
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// this.SetValByKey("OID",oid);
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// if (this.IsExits==false)
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// this.InsertAsOID(oid);
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//this.Update();
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}
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#endregion
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}
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|
abstract public class EntitiesOID : Entities
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{
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/// <summary>
|
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/// 构造
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/// </summary>
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public EntitiesOID()
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{
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}
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#region 查询方法, 专用于与语言有关的实体
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/// <summary>
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/// 查询出来, 所有中文的实例 .
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/// </summary>
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public void RetrieveAllCNEntities()
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{
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this.RetrieveByLanguageNo("CH");
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}
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/// <summary>
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/// 按语言查询。
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/// </summary>
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public void RetrieveByLanguageNo(string LanguageNo)
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{
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QueryObject qo = new QueryObject(this);
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qo.AddWhere("LanguageNo", LanguageNo);
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qo.DoQuery();
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}
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#endregion
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}
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}
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