• NHibernate 3.2 使用 Conformist 进行 CodeFirst 开发


    NHibernate 3.2 GA 正式版于 2011-07-30 发布,这一版本对 CodeFirst 的支持性更好了,因为它提供了 Conformist 取代之前第三方的 ConfOrm。

     

    NHibernate 3.2 下载地址:http://sourceforge.net/projects/nhibernate/files/NHibernate/

     

    下面将讲一下如何使用这一新成员进行数据库的基本操作。我使用的开发环境是:VS2010 + NHibernate 3.2 + MVC 3,下面是项目目录图:

     

     

     

    项目只要引用 “Iesi.Collections.dll” 和 “NHibernate.dll” 两个类库文件即可。 

     

     NHibernateCfg 代码:

    注意,“MsSql2005Dialect” 表示使用SQL 2005数据库,数据库名为“DiPiPiDB”。

     Code Snippet

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Web;
    5.  
    6. using NHibernate.Cfg;
    7. using NHibernate.Dialect;
    8. using NHibernate.Driver;
    9. using NHibernate.Mapping.ByCode;
    10.  
    11. namespace DiPiPi.Mvc3.Orm
    12. {
    13.     public static class NHibernateCfg
    14.     {
    15.         private const string _ConnectionString =
    16.         @"Data Source=localhost;Initial Catalog=DiPiPiDB;Integrated Security=True;Pooling=False";
    17.  
    18.         public static Configuration GetConfiguration()
    19.         {
    20.  
    21.             var configure = new Configuration();
    22.  
    23.             configure.SessionFactoryName("DiPiPiDB");
    24.             
    25.            
    26.             configure.DataBaseIntegration(db =>
    27.             {
    28.                 db.Dialect<MsSql2005Dialect>();
    29.                 db.Driver<SqlClientDriver>();
    30.                 db.ConnectionString = _ConnectionString;
    31.             });
    32.  
    33.             

     

     

     ISessionManager 代码:

     

     Code Snippet

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Text;
    5.  
    6. using NHibernate;
    7.  
    8. namespace DiPiPi.Mvc3.Orm
    9. {
    10.     public interface ISessionManager
    11.     {
    12.         ISessionFactory GetSession();
    13.  
    14.         void CreateDataTable();
    15.  
    16.         void DropDataTable();
    17.     }

     

    SessionManager 代码:

     Code Snippet

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Web;
    5.  
    6. using NHibernate;
    7. using NHibernate.Cfg;
    8. using NHibernate.Cfg.MappingSchema;
    9. using NHibernate.Tool.hbm2ddl;
    10. using NHibernate.Mapping.ByCode;
    11.  
    12. namespace DiPiPi.Mvc3.Orm
    13. {
    14.     /// <summary>
    15.     /// 使用 NHibernate 操作数据库的Session
    16.     /// </summary>
    17.     public class SessionManager : ISessionManager
    18.     {
    19.         private Configuration conf = null;
    20.         private ISessionFactory sessionFactory = null;
    21.         private ModelMapper mapper = null;
    22.  
    23.         public SessionManager()
    24.         {
    25.             mapper = new ModelMapper();
    26.             conf = NHibernateCfg.GetConfiguration();
    27.  
    28.             LoadOrmMapping();
    29.  
    30.         }
    31.  
    32.         public Configuration GetConfiguration()
    33.         {
    34.  
    35.             return conf;
    36.  
    37.         }
    38.  
    39.         private void LoadOrmMapping()
    40.         {
    41.  
    42.             //在Configuration中添加HbmMapping
    43.             AddMapping<UserInfoMap>();
    44.  
    45.             var hbmMapping = mapper.CompileMappingForAllExplicitlyAddedEntities();
    46.             conf.AddMapping(hbmMapping);
    47.  
    48.             //Console.WriteLine(hbmMapping.AsString());
    49.  
    50.         }
    51.  
    52.  
    53.         private void AddMapping<TModel>() where TModel : IConformistHoldersProvidernew()
    54.         {
    55.  
    56.             mapper.AddMapping<TModel>();
    57.  
    58.         }
    59.  
    60.  
    61.  
    62.         public ISessionFactory GetSession()
    63.         {
    64.  
    65.             //配置数据库
    66.             SchemaMetadataUpdater.QuoteTableAndColumns(conf);
    67.  
    68.             //建立SessionFactory
    69.             sessionFactory = conf.BuildSessionFactory();
    70.  
    71.             return sessionFactory;
    72.         }
    73.  
    74.  
    75.  
    76.         public void CreateDataTable()
    77.         {
    78.  
    79.             //配置数据库
    80.             SchemaMetadataUpdater.QuoteTableAndColumns(conf);
    81.             //创建数据库
    82.             new SchemaExport(conf).Create(falsetrue);
    83.         }
    84.  
    85.         public void DropDataTable()
    86.         {
    87.  
    88.             //配置数据库
    89.             SchemaMetadataUpdater.QuoteTableAndColumns(conf);
    90.             //删除数据库
    91.             new SchemaExport(conf).Drop(falsetrue);
    92.         }
    93.  
    94.         public ISession OpenSession()
    95.         {
    96.             if (sessionFactory != null)
    97.             {
    98.                 return sessionFactory.OpenSession();
    99.             }
    100.             else
    101.             {
    102.                 return null;
    103.             }
    104.         }
    105.  
    106.         public void CloseSession()
    107.         {
    108.             if (sessionFactory != null)
    109.             {
    110.                 sessionFactory.Close();
    111.             }
    112.  
    113.         }
    114.  
    115.  
    116.     }
    117. }

     

     UserInfo 实体类代码:

      Code Snippet

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Web;
    5.  
    6. namespace DiPiPi.Mvc3.Orm
    7. {
    8.     public class UserInfo
    9.     {
    10.         public virtual int UserId { getset; }
    11.  
    12.         public virtual string UserName { getset; }
    13.  
    14.     }
    15. }

     

     UserInfoMap 实体映射类代码:

     注意,这里开始使用 Conformist 了,“Generators.Identity”表示主键为整型自增,如果是“Generators.Guid” 表示采用Guid方式,还有其他方式,大家可以去研究。

      Code Snippet

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Web;
    5.  
    6. using NHibernate.Mapping.ByCode;
    7. using NHibernate.Mapping.ByCode.Conformist;
    8.  
    9. namespace DiPiPi.Mvc3.Orm
    10. {
    11.     /// <summary>
    12.     /// http://taven.cnblogs.com
    13.     /// 
      李锡远的博客
    14.     /// 
      实体映射类
    15.     /// </summary>
    16.     public class UserInfoMap : ClassMapping<UserInfo>
    17.     {
    18.         public UserInfoMap()
    19.         {
    20.             Id(entity => entity.UserId, map =>
    21.                 {
    22.                     map.Column("UserInfoID");
    23.                     map.Generator(Generators.Identity);
    24.                 });
    25.  
    26.             Property(entity => entity.UserName, map => map.Length(150));
    27.  

     

     UserInfoRepository 数据库读取的仓储类代码:(这个类包含了数据库的 增、删、改 常用方法)

     Code Snippet

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Web;
    5.  
    6. using NHibernate.Criterion;
    7.  
    8. namespace DiPiPi.Mvc3.Orm
    9. {
    10.     public class UserInfoRepository
    11.     {
    12.         private ISessionManager sessionManage;
    13.  
    14.         public UserInfoRepository(ISessionManager _sessionManage)
    15.         {
    16.             sessionManage = _sessionManage;
    17.         }
    18.  
    19.         public List<UserInfo> FindAll()
    20.         {
    21.             using (var session = sessionManage.GetSession().OpenSession())
    22.             {
    23.                 var query = session.QueryOver<UserInfo>()
    24.                 .OrderBy(p => p.UserId).Asc
    25.                 .List();
    26.  
    27.                 return query.ToList();
    28.             }
    29.         }
    30.  
    31.         public List<UserInfo> Find(ICriterion condition)
    32.         {
    33.             using (var session = sessionManage.GetSession().OpenSession())
    34.             {
    35.                 var query = session.QueryOver<UserInfo>()
    36.                 .Where(condition)
    37.                 .OrderBy(p => p.UserId).Asc
    38.                 .List();
    39.  
    40.                 return query.ToList();
    41.             }
    42.         }
    43.  
    44.         public List<UserInfo> FindbyExample(UserInfo entity)
    45.         {
    46.             using (var session = sessionManage.GetSession().OpenSession())
    47.             {
    48.                 var query = session.CreateCriteria<UserInfo>().Add(Example.Create(entity)).List<UserInfo>();
    49.  
    50.                 return query.ToList();
    51.             }
    52.         }
    53.  
    54.         public void Save(UserInfo model)
    55.         {
    56.             using (var session = sessionManage.GetSession().OpenSession())
    57.             {
    58.                 using (var trans = session.BeginTransaction())
    59.                 {
    60.                     
    61.                     session.Save(model);
    62.                     trans.Commit();
    63.                 }
    64.             }
    65.         }
    66.  
    67.         public void Modify(UserInfo model)
    68.         {
    69.             using (var session = sessionManage.GetSession().OpenSession())
    70.             {
    71.                 using (var trans = session.BeginTransaction())
    72.                 {
    73.                     session.Update(model);
    74.                     trans.Commit();
    75.                 }
    76.             }
    77.         }
    78.  
    79.         public void Remove(UserInfo entity)
    80.         {
    81.             using (var session = sessionManage.GetSession().OpenSession())
    82.             {
    83.                 using (var trans = session.BeginTransaction())
    84.                 {
    85.                     session.Delete(entity);
    86.  
    87.                     trans.Commit();
    88.                 }
    89.             }
    90.         }
    91.  
    92.         public void RemoveByID(int Id)
    93.         {
    94.             using (var session = sessionManage.GetSession().OpenSession())
    95.             {
    96.                 using (var trans = session.BeginTransaction())
    97.                 {
    98.                     session.CreateQuery("delete UserInfo where UserId = :userId").SetInt32("userId", Id).ExecuteUpdate();
    99.  
    100.                     trans.Commit();
    101.                 }
    102.             }
    103.         }
    104.  
    105.         public void Removes(String userName

     

     

     将实体代码写好后,执行下面代码可直接创建数据库的表:

     Code Snippet

    1. ISessionManager session = new SessionManager();
    2.  
    3. session.CreateDataTable();

     

    执行下面代码可插入数据:

     Code Snippet

    1. ISessionManager session = new SessionManager();
    2. UserInfoRepository userinfoR = new UserInfoRepository(session);
    3. for (var i = 0; i < 10; i++)
    4. {
    5.     UserInfo u = new UserInfo();
    6.     u.UserName = "
      远哥"
      +i;
    7.  
    8.     userinfoR.Save(u);
    9. }

     

    执行下面代码可读取数据:

    Code Snippet
    1. ISessionManager session = new SessionManager();
    2.  
    3. UserInfoRepository userinfoR = new UserInfoRepository(session);
    4. List<UserInfo> list = userinfoR.FindAll();

     

     

    项目源码打包下载:https://files.cnblogs.com/taven/DiPiPiDemo.rar

     

     

    作者:Taven.李锡远
    出处:http://taven.cnblogs.com/
    本文版权归作者和博客园共有,欢迎转载。但必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
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  • 原文地址:https://www.cnblogs.com/sunjie9606/p/2145248.html
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