Visual Entity 使用（二）创建一对多关系

1、将 Products 表拖放到设计器上

 

2、Visual Entity 将会自动生成下面的代码

DataContext 代码

publicpartialclass NorthwindDataContext : NHibernate.Linq.NHibernateContext
{
    
    public NorthwindDataContext(NHibernate.ISession session) : 
            base(session)
    {
    }
    
    public NorthwindDataContext() : 
            base(CreateSession())
    {
    }
    
    public System.Linq.IOrderedQueryable<Category> Categories
    {
        get
        {
            returnthis.Session.Linq<Category>();
        }
    }
    
    public System.Linq.IOrderedQueryable<Product> Products
    {
        get
        {
            returnthis.Session.Linq<Product>();
        }
    }
    
    publicstatic ISessionFactory CreateSessionFactory()
    {
        Configuration cfg;
        cfg =new Configuration();
        cfg.Configure();
        ISessionFactory factory;
        factory = cfg.BuildSessionFactory();
        return factory;
    }
    
    publicstatic ISession CreateSession()
    {
        ISession session;
        ISessionFactory factory;
        factory = CreateSessionFactory();
        session = factory.OpenSession();
        return session;
    }
}

Category 实体类代码

publicpartialclass Category
    {
        
        privateint _CategoryID;
        
        privatestring _CategoryName;
        
        privatestring _Description;
        
        privatebyte[] _Picture;
        
        private IList<Product> _Products;
        
        publicvirtualint CategoryID
        {
            get
            {
                returnthis._CategoryID;
            }
            set
            {
                this._CategoryID = value;
            }
        }
        
        publicvirtualstring CategoryName
        {
            get
            {
                returnthis._CategoryName;
            }
            set
            {
                this._CategoryName = value;
            }
        }
        
        publicvirtualstring Description
        {
            get
            {
                returnthis._Description;
            }
            set
            {
                this._Description = value;
            }
        }
        
        publicvirtualbyte[] Picture
        {
            get
            {
                returnthis._Picture;
            }
            set
            {
                this._Picture = value;
            }
        }
        
        publicvirtual IList<Product> Products
        {
            get
            {
                returnthis._Products;
            }
            set
            {
                this._Products = value;
            }
        }
    }

Product 实体类

publicpartialclass Product
    {
        
        privateint _ProductID;
        
        privatestring _ProductName;
        
        private System.Nullable<int> _SupplierID;
        
        private System.Nullable<int> _CategoryID;
        
        privatestring _QuantityPerUnit;
        
        private System.Nullable<float> _UnitPrice;
        
        private System.Nullable<short> _UnitsInStock;
        
        private System.Nullable<short> _UnitsOnOrder;
        
        private System.Nullable<short> _ReorderLevel;
        
        privatebool _Discontinued;
        
        private Category _Category;
        
        publicvirtualint ProductID
        {
            get
            {
                returnthis._ProductID;
            }
            set
            {
                this._ProductID = value;
            }
        }
        
        publicvirtualstring ProductName
        {
            get
            {
                returnthis._ProductName;
            }
            set
            {
                this._ProductName = value;
            }
        }
        
        publicvirtual System.Nullable<int> SupplierID
        {
            get
            {
                returnthis._SupplierID;
            }
            set
            {
                this._SupplierID = value;
            }
        }
        
        publicvirtual System.Nullable<int> CategoryID
        {
            get
            {
                returnthis._CategoryID;
            }
            set
            {
                this._CategoryID = value;
            }
        }
        
        publicvirtualstring QuantityPerUnit
        {
            get
            {
                returnthis._QuantityPerUnit;
            }
            set
            {
                this._QuantityPerUnit = value;
            }
        }
        
        publicvirtual System.Nullable<float> UnitPrice
        {
            get
            {
                returnthis._UnitPrice;
            }
            set
            {
                this._UnitPrice = value;
            }
        }
        
        publicvirtual System.Nullable<short> UnitsInStock
        {
            get
            {
                returnthis._UnitsInStock;
            }
            set
            {
                this._UnitsInStock = value;
            }
        }
        
        publicvirtual System.Nullable<short> UnitsOnOrder
        {
            get
            {
                returnthis._UnitsOnOrder;
            }
            set
            {
                this._UnitsOnOrder = value;
            }
        }
        
        publicvirtual System.Nullable<short> ReorderLevel
        {
            get
            {
                returnthis._ReorderLevel;
            }
            set
            {
                this._ReorderLevel = value;
            }
        }
        
        publicvirtualbool Discontinued
        {
            get
            {
                returnthis._Discontinued;
            }
            set
            {
                this._Discontinued = value;
            }
        }
        
        publicvirtual Category Category
        {
            get
            {
                returnthis._Category;
            }
            set
            {
                this._Category = value;
            }
        }
    }

运行下面的代码：

var dc =new NorthwindDataContext();
var categories = dc.Categories.ToList();
foreach (var category in categories)
{
    foreach (var product in category.Products)
    {
        Console.WriteLine(product.ProductName);
    }
    Console.WriteLine();
}

运行结果如下：