NHibernate小项目解说
NHibernate小项目解说
完成了实体层 就该写中间层了，看了哪几篇文章后，对他们用的哪个EntityConrol感到非常好用，我也就几乎是照抄了一个，呵呵，拿来主意 吗，
添加一个 新建工程 guestbook.Dal
我把Sessionfactory 和 EntityControl分成了两个文件其主要代码为
usingSystem;
usingSystem.Reflection;
usingSystem.Data;
usingSystem.Data.SqlClient;
usingNHibernate;
usingNHibernate.Cfg;
usingNHibernate.Dialect;
usingNHibernate.Tool.hbm2ddl;
usingguestbook.data;
namespaceguestbook.Dal
{
///<summary>
///SessionFactory的摘要说明。
///</summary>
publicclassSessionFactory
{
privatestaticISessionFactorysessions;
privatestaticConfigurationcfg;
privatestaticDialectdialect;
publicSessionFactory()
{
//
//TODO:在此处添加构造函数逻辑
//
}
publicstaticISessionOpenSession()
{
if(sessions==null)
{
BuildSessionFactory();
}
returnsessions.OpenSession();
}
privatestaticvoidBuildSessionFactory()
{
ExportSchema(newstring[]{
"users.hbm.xml",
"guestbook.hbm.xml"
},true);
}
privatestaticvoidExportSchema(string[]files,boolexportschema)
{
cfg=newConfiguration();
for(inti=0;i<files.Length;i++)
{
cfg.AddResource("guestbook.data.hbm."+files[i],Assembly.Load("guestbook.data"));
}
dialect=Dialect.GetDialect();
if(exportschema)newSchemaExport(cfg).Create(true,true);
sessions=cfg.BuildSessionFactory();
}
}
}
usingSystem;
usingNHibernate;
usingguestbook.data;
namespaceguestbook.Dal
{
///<summary>
///EntityContorl的摘要说明。
///</summary>
publicclassEntityControl
{
privatestaticEntityControlentity;
publicstaticEntityControlCreateEntityControl()
{
if(entity==null)
{
entity=newEntityControl();
}
returnentity;
}
publicvoidaddEntity(Objectentity)
{
ISessions=SessionFactory.OpenSession();
ITransactiont=s.BeginTransaction();
try
{
s.Save(entity);
t.Commit();
}
catch(Exceptione)
{
t.Rollback();
throwe;
}
finally
{
s.Close();
}
}
publicvoidupdateEntity(Objectentity,Objectkey)
{
ISessions=SessionFactory.OpenSession();
ITransactiont=s.BeginTransaction();
try
{
s.Update(entity,key);
t.Commit();
}
catch(Exceptione)
{
t.Rollback();
throwe;
}
finally
{
s.Close();
}
}
publicvoidDelEntity(objectentity)
{
ISessions=SessionFactory.OpenSession();
ITransactiont=s.BeginTransaction();
try
{
s.Delete(entity);
t.Commit();
}
catch(Exceptione)
{
t.Rollback();
throwe;
}
finally
{
s.Close();
}
}
}
}
其中代码的意思 我就不说了，我在文章开头提供的两位仁兄的文章里已经说明的很清楚了，我只是借签过吗 ，其中我的EntityControl还没有完成，只是先提供了一插入、更新、删除的功能，
写一个应用类试试
usingSystem;
usingNHibernate;
usingguestbook.data;
namespaceguestbook.Dal
{
///<summary>
///usersdal的摘要说明。
///</summary>
publicclassusersdal
{
privateEntityControlcontrol;
publicusersdal()
{
control=EntityControl.CreateEntityControl();
}
publicvoidaddUser(usersuser)
{
control.addEntity(user);
}
publicvoidupdateUser(usersuser,intId)
{
control.updateEntity(user,user.id);
}
publicvoidDelUser(usersuser)
{
control.DelEntity(user);
}
添加一个 新建工程 guestbook.Dal
我把Sessionfactory 和 EntityControl分成了两个文件其主要代码为
usingSystem;usingSystem.Reflection;usingSystem.Data;usingSystem.Data.SqlClient;usingNHibernate;usingNHibernate.Cfg;usingNHibernate.Dialect;usingNHibernate.Tool.hbm2ddl;usingguestbook.data;namespaceguestbook.Dal{
///<summary>///SessionFactory的摘要说明。///</summary>publicclassSessionFactory{privatestaticISessionFactorysessions;privatestaticConfigurationcfg;privatestaticDialectdialect;publicSessionFactory(){////TODO:在此处添加构造函数逻辑//}publicstaticISessionOpenSession(){if(sessions==null){BuildSessionFactory();}returnsessions.OpenSession();}privatestaticvoidBuildSessionFactory(){ExportSchema(newstring[]{"users.hbm.xml","guestbook.hbm.xml"},true);}privatestaticvoidExportSchema(string[]files,boolexportschema){cfg=newConfiguration();for(inti=0;i<files.Length;i++){cfg.AddResource("guestbook.data.hbm."+files[i],Assembly.Load("guestbook.data"));}dialect=Dialect.GetDialect();if(exportschema)newSchemaExport(cfg).Create(true,true);sessions=cfg.BuildSessionFactory();}}}usingSystem;usingNHibernate;usingguestbook.data;namespaceguestbook.Dal{///<summary>///EntityContorl的摘要说明。///</summary>publicclassEntityControl{privatestaticEntityControlentity;publicstaticEntityControlCreateEntityControl(){if(entity==null){entity=newEntityControl();}returnentity;}publicvoidaddEntity(Objectentity){ISessions=SessionFactory.OpenSession();ITransactiont=s.BeginTransaction();try{s.Save(entity);t.Commit();}catch(Exceptione){t.Rollback();throwe;}finally{s.Close();}}publicvoidupdateEntity(Objectentity,Objectkey){ISessions=SessionFactory.OpenSession();ITransactiont=s.BeginTransaction();try{s.Update(entity,key);t.Commit();}catch(Exceptione){t.Rollback();throwe;}finally{s.Close();}}publicvoidDelEntity(objectentity){ISessions=SessionFactory.OpenSession();ITransactiont=s.BeginTransaction();try{s.Delete(entity);t.Commit();}catch(Exceptione){t.Rollback();throwe;}finally{s.Close();}}}}写一个应用类试试
usingSystem;usingNHibernate;usingguestbook.data;namespaceguestbook.Dal{///<summary>///usersdal的摘要说明。///</summary>publicclassusersdal{privateEntityControlcontrol;publicusersdal(){control=EntityControl.CreateEntityControl();}publicvoidaddUser(usersuser){control.addEntity(user);}publicvoidupdateUser(usersuser,intId){control.updateEntity(user,user.id);}publicvoidDelUser(usersuser){control.DelEntity(user);}