| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 | DAL.AddConnStr("xxgk", "Data Source=192.168.1.21;Initial Catalog=信息公开;user id=sa;password=Pass@word", null, "mssql");var dal = DAL.Create("xxgk");DAL.AddConnStr("xxgk2", "Data Source=XXGK.db;Version=3;", null, "sqlite");File.Delete("XXGK.db");//DAL.ShowSQL = false;var etf = new EntityTransform();etf.SrcConn = "xxgk";etf.DesConn = "xxgk2";etf.AllowInsertIdentity = true;etf.TableNames.Remove("PubInfoLog");//etf.OnTransformTable += (s, e) => { if (e.Arg.Name == "")e.Arg = null; };var rs = etf.Transform();Console.WriteLine("共转移：{0}", rs); |
其实你也可以自己实现，XCode内部代码如下：
| 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | using System;using System.Collections.Generic;using NewLife;using NewLife.Collections;using NewLife.Log;#if !NET4using NewLife.Reflection;#endifusing XCode.DataAccessLayer;namespace XCode.Transform{ /// <summary>实体转换</summary> public class EntityTransform { #region 属性 private String _SrcConn; /// <summary>源</summary> public String SrcConn { get { return _SrcConn; } set { _SrcConn = value; } } private String _DesConn; /// <summary>目的</summary> public String DesConn { get { return _DesConn; } set { _DesConn = value; } } private ICollection<String> _TableNames; /// <summary>要导数据的表，为空表示全部</summary> public ICollection<String> TableNames { get { if (_TableNames == null) { _TableNames = new HashSet<String>(StringComparer.OrdinalIgnoreCase); if (!String.IsNullOrEmpty(SrcConn)) { foreach (var item in DAL.Create(SrcConn).Tables) { _TableNames.Add(item.Name); } } } return _TableNames; } set { _TableNames = value; } } private Int32 _BatchSize = 1000; /// <summary>每批处理多少行数据，默认1000</summary> public Int32 BatchSize { get { return _BatchSize; } set { _BatchSize = value; } } private Boolean _AllowInsertIdentity; /// <summary>是否允许插入自增列</summary> public Boolean AllowInsertIdentity { get { return _AllowInsertIdentity; } set { _AllowInsertIdentity = value; } } #endregion #region 方法 /// <summary>把一个链接的数据全部导入到另一个链接</summary> /// <returns></returns> public Int32 Transform() { var dal = DAL.Create(SrcConn); var tables = dal.Tables; tables.RemoveAll(t => t.IsView); var tns = TableNames; if (tns != null && tns.Count > 0) tables.RemoveAll(t => !tns.Contains(t.Name) && !tns.Contains(t.Alias)); var total = 0; foreach (var item in tables) { if (OnTransformTable != null) { var e = new EventArgs<IDataTable>(item); OnTransformTable(this, e); if (e.Arg == null) continue; } total += TransformTable(dal.CreateOperate(item.Name)); } return total; } /// <summary>把一个表的数据全部导入到另一个表</summary> /// <param name="eop">实体操作者。</param> /// <param name="getData">用于获取数据的委托</param> /// <returns></returns> public Int32 TransformTable(IEntityOperate eop, Func<Int32, Int32, IEntityList> getData = null) { var name = eop.TableName; var count = eop.Count; if (getData == null) getData = (start, max) => eop.FindAll(null, null, null, start, max); // 在目标链接上启用事务保护 eop.ConnName = DesConn; eop.BeginTransaction(); try { XTrace.WriteLine("{0} 共 {1}", name, count); // 允许插入自增 var oldII = eop.AllowInsertIdentity; if (AllowInsertIdentity) eop.AllowInsertIdentity = true; // 关闭SQL日志 var oldShowSql = DAL.ShowSQL; DAL.ShowSQL = false; var total = 0; var index = 0; while (true) { eop.ConnName = SrcConn; var list = getData(index, BatchSize); if (list == null || list.Count < 1) break; index += list.Count; // 处理事件，外部可以修改实体数据 if (OnTransformEntity != null) { var e = new EventArgs<IEntity>(null); foreach (var entity in list) { e.Arg = entity; OnTransformEntity(this, e); } } eop.ConnName = DesConn; var rs = list.Insert(true); XTrace.WriteLine("{0} 导入 {1}/{2} {3:p}", name, index, count, (Double)index / count); total += rs; } DAL.ShowSQL = oldShowSql; // 关闭插入自增 if (AllowInsertIdentity) eop.AllowInsertIdentity = oldII; // 在目标链接上启用事务保护 eop.ConnName = DesConn; eop.Commit(); return total; } catch (Exception ex) { XTrace.WriteLine("{0} 错误 {1}", name, ex.Message); // 在目标链接上启用事务保护 eop.ConnName = DesConn; eop.Rollback(); throw; } } #endregion #region 事件 /// <summary>转换表时触发。如果参数被置空，表示不转换该表</summary> public event EventHandler<EventArgs<IDataTable>> OnTransformTable; ///// <summary>转换实体时触发</summary> //public event EventHandler<EventArgs<IEntity>> OnTransformEntity; /// <summary>转换实体时触发</summary> public event EventHandler<EventArgs<IEntity>> OnTransformEntity; #endregion }} |