Introduction to nhib.pdf and upgraded demo

In Article 1ArticleThere are a few issues as the first Nhibernate getting started demo! I want to write some additional knowledge today! Read:Introduction and demo of nhib.pdf

The following are the upgrades of our project:

Let's take a look.ProgramStructure:

Question 1: About the hibernate. cfg. xml configuration file.

The file name must be hibernate. cfg. xml. . Nhib.pdf automatically finds the file in the project output. You must set the property of this file to always copy.

Problem 2: Configure nhib.pdf in webconfig instead of using hibernate. cfg. xml.

Configuring Nhibernate in webconfig is another configuration method. The format is as follows:

Code

  <? XML version = "1.0" encoding = "UTF-8"  ?>  
  <  Configuration  >  
  <! --  Add this element  -->  
  <  Configsections  >  
  < Section
  Name  = "Hibernate-configuration"  
Type  = "Nhibernate. cfg. configurationsectionhandler, nhibler"  
  />  
  </  Configsections  >  

  <! --  Add this element  --> 
  <  Hibernate-Configuration  Xmlns  = "Urn: nhibernate-configuration-2.2"  >  
  <  Session-factory  >  
  <  Property  Name  = "Dialect"  > Nhib.pdf. dialect. mssql2005dialect  </  Property  >  
  <  Property  Name  = "Connection. provider"  >  Nhib.pdf. Connection. driverconnectionprovider  </  Property  >  
  < Property  Name  = "Connection. connection_string"  >  
Server = (local); initial catalog = hktemp; Integrated Security = sspi
  </  Property  >  
  <  Mapping  Assembly  = "Nhibernatedemo"     /> 
  </  Session-factory  >  
  </  Hibernate-Configuration  >  

  <! --  Leave the system. web section unchanged  -->  
  <  System. Web  > 
...
  </  System. Web  >  
  </  Configuration  >  
 

Explanation: nhibect distinguishes us through dialect by using Microsoft SQL Server 2005 database and connects to the database through the specified connection string.

Question 3: sessionfactory is for a database, so we can implement a nhibernatehelper in single-instance mode. See the following:Code[This is the official implementation of nhibernatehelper]

Code

  Public     Sealed     Class  Nhibernatehelper
{
  Private     Const     String  Currentsessionkey  =    "  Nhibernate. currentsession  "  ;
  Private     Static     Readonly  Isessionfactory sessionfactory;

  Static  Nhibernatehelper ()
{
Configuration cfg  =     New Configuration ();

Sessionfactory  =     New  Configuration (). Configure (). buildsessionfactory ();
}

  Public     Static  Isession getcurrentsession ()
{
Httpcontext Context  =  Httpcontext. Current;
Isession currentsession  =  Context. items [currentsessionkey] As  Isession;

  If  (Currentsession  =     Null  )
{
Currentsession  =  Sessionfactory. opensession ();
Context. items [currentsessionkey]  =  Currentsession;
}

  Return  Currentsession;
}

 Public     Static     Void  Closesession ()
{
Httpcontext Context  =  Httpcontext. Current;
Isession currentsession  =  Context. items [currentsessionkey]  As  Isession;

  If  (Currentsession  =    Null  )
{
  //  No current session  
    Return  ;
}

Currentsession. Close ();
Context. Items. Remove (currentsessionkey );
}

  Public     Static     Void Closesessionfactory ()
{
  If  (Sessionfactory  ! =     Null  )
{
Sessionfactory. Close ();
}
}
}
 

The above does not report an error in nhibernatehelper: You have correctly configured Nhibernate in webconfig or added the hibernate. cfg. xml configuration file. Note that the file name must be]

After this implementation, our calling code becomes much simpler. Let's take a look at the code.

 

  Isession session=Nhibernatehelper. getcurrentsession ();
//... User Initialization
Session. Save (User );
Session. Delete (User );
Session. Update (User );
 

 

 

The above is a simple upgrade of this demo!

 

Source code download: NhibernateDemo-2.0.zip