用法：
其实你也可以自己实现，XCode内部代码如下：
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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：
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using
System;
using
System.Collections.Generic;
using
NewLife;
using
NewLife.Collections;
using
NewLife.Log;
#if !NET4
using
NewLife.Reflection;
#endif
using
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
}
}
|
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