发表新帖
发表新帖

What ORM can I use for Access 2007 - 2010? I'm after WPF binding to the tables etc

前端 未结
关注
4 992
抹茶落季
抹茶落季 2020-12-17 02:37

I\'ve a legacy database that all sites have, it describes specific content in a number of catagory/subcatagory/child item format. Until now, adding/editing the content is ei

4条回答
  • 情深已故
    情深已故 (楼主)
    2020-12-17 02:58

    Hate to resurrect an old thread but I recently did a WPF project using PetaPoco, a micro-ORM, with MS Access so I thought I'd share my implementation.

    To add MS Access support to PetaPoco, you just need to add a couple of bits of code:

    First add an AccessDatabaseType class. All of the DataBaseType classes are at the end of the PetaPoco.cs file. Just add the new class after SqlServerDatabaseType.

    class AccessDatabaseType : DatabaseType
{
    public override object ExecuteInsert(Database db, IDbCommand cmd, string PrimaryKeyName)
    {               
        db.ExecuteNonQueryHelper(cmd);
        return db.ExecuteScalar("SELECT @@@IDENTITY AS NewID;");
    }

}



    Next, modify PetaPoco.Internal.DatabaseType.Resolve() to support the AccessDatabaseType. (This code assumes you are using the Jet OLEDB provider)
    


    public static DatabaseType Resolve(string TypeName, string ProviderName)
{
    //...

    if (ProviderName.IndexOf("Oledb", StringComparison.InvariantCultureIgnoreCase) >= 0)
        return Singleton.Instance;  

    // Assume SQL Server
    return Singleton.Instance;
}

    


    Finally, to instantiate PetaPoco use this:
    


    Db = New PetaPoco.Database("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\db.mdb", "System.Data.Oledb")

    


    


    Limitations:
    


      

    • PetaPoco assumes your primary keys are autonumber/identity fields. If you have a PK that's not an autonumber or you have a composite PK, you'll need to implement your own insert & save logic.
      • 

    • I didn't need paging in my application so I didn't implement it.
      • 

    
    
    
             
    
                                                        
    
            
            
    
              
                
                0
              
                   
                
               讨论(0)
              
                                                  
              
              
    
                          
             
       
          
              
    
                                       
    

    

                
    
                         
          
                              			
        
        
        
    
          
    
            
            
    
              
              
    
            
    


                                 
              
    
            
    
                          
    

        
         
    
                
                
    
                  
                
    
                
    
                   看不清?
                
    
              
    
                                  
    
                    
   
                 
             
              
    提交回复
    
            
    
          
    
        
    
      
       
      
    
    
    
          
 
     
 
    
        
    热议问题