在NHibernate里执行存储过程

NHibernate 是一个基于.Net的针对关系型数据库的对象持久化类库,来源于非常优秀的基于Java的Hibernate关系型持久化工具.
在NHibernate里怎么执行存储过程呢?下面有一个简单的例子,使用的MS SQLServer2000 NorthWind库里的CustOrderHist存储过程.
先建2个实体类:
1.CustOrderHist : Customer Historical Order Summary

     /// <summary>

     /// Customer Historical Order Summary Object Entity Class

     /// </summary>
    public class CustOrderHist

        private string productName;
        private int total;

 

 　　　　this.total = total;
     }       

  　　 /// <summary>
 　　  /// Product Name

　　　/// </summary>
        public string ProductName
        {            

　　　　get { return productName; }        

　　　}        

  　　/// <summary>
       /// Total Quantity
       /// </summary>
       public int Total
       {
            get { return total; }
　　 }

        /// <summary>        

  　　/// Return Product Name And Quantity
        /// </summary>
        /// <returns></returns>
        public override string ToString ( )
        {
           return "Product Name : " + productName + "; Quantity: " + total;
        }
    }

///   <summary>
         ///  Constructor
        ///   </summary>
        ///   <param name="productName"> Product Name </param>
         ///   <param name="total"> Total Quantity </param>
         public  CustOrderHist (  string  productName, int  total)
      {
             this .productName  =  productName;            

映射关系:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <sql-query name="GetCustomerOrderHistory">
　　<return-scalar column="ProductName" type="String" />
  　<return-scalar column="Total" type="int" />

　　　　exec CustOrderHist :Customer  

　</sql-query>
</hibernate-mapping>

2.Customer:Customer表的2个字段:CustomerID And CompanyName 提供选择CustomerID

　　  /// <summary>
    　/// Customer Object Entity Class
 　　/// </summary>

　　public class Customer
    {
        private string customerID;
　　　private string companyName;

　　　 /// <summary>
         /// Customer ID
   　　/// </summary>
        public string CustomerID
        {
            get { return customerID; }

            set { customerID = value; }
        }

        /// <summary>
        /// Company Name
        /// </summary>

　　　public string CompanyName
     　{
            get { return companyName; }
            set { companyName = value; }
    　}
    }

映射关系:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
 <class name="NHibernate.Study.Entity.Customer,Entity" table="Customers">

    <id name="CustomerID">
　　　　<column name="CustomerID" sql-type="string" length="5"/>
　　　　<generator class="assigned" />
    </id>
    <property name="CompanyName">
     　　<column name="CompanyName" sql-type="string" length="40"/>
    </property>
 </class>
</hibernate-mapping>

再来看看Data Object Access Class:

    public class BllExecPro : IDisposable
   {
　　　　private ISession session = null;

     　　public void Dispose ( )
    　　{
         　　session.Dispose( );
    　　}

       　public BllExecPro ( )        

　　　 {
            session = NHLibrary.NHFactory.OpenSession( );
         }

        public IList<Customer> getCustomerIDList ( )
        {
            return session.CreateQuery( "FROM Customer" )

                .SetMaxResults( 10 )
              .List<Customer>( );
     　}

     　public IList<CustOrderHist> getCustOrderHistList ( string customerID )
       {
           IQuery query = session.GetNamedQuery( "GetCustomerOrderHistory" )
              .SetString( "CustomerID" , customerID )
                .SetResultTransformer(

                    new NHibernate.Transform.AliasToBeanConstructorResultTransformer(

                    typeof( CustOrderHist ).GetConstructors( )[0] ) );

            return query.List<CustOrderHist>( );
        }
    }

页面 HTML:

<form id="form1" runat="server">
 <div>
     <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" DataTextField="CompanyName"
    　　DataValueField="CustomerID" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"  Width="238px">
 　</asp:DropDownList>
    <asp:GridView ID="GridView1" runat="server"></asp:GridView>    
 </div>    

</form>

Codebehind:

    protected void Page_Load ( object sender , EventArgs e )
    {
        if ( !IsPostBack )
        {
            bindDropDownList( );        }
    }
    private void bindDropDownList ( )

    {

        BllExecPro bllExecPro = new BllExecPro( );

        DropDownList1.DataSource = bllExecPro.getCustomerIDList( );
        DropDownList1.DataBind( );
        bindGridView( bllExecPro,DropDownList1.SelectedValue );
    }

    private void bindGridView (BllExecPro bllExecPro, string customerID )
    {
        if ( bllExecPro == null)

            bllExecPro = new BllExecPro( );
        GridView1.DataSource = bllExecPro.getCustOrderHistList( customerID );
        GridView1.DataBind( );
        bllExecPro.Dispose( );
    }

    protected void DropDownList1_SelectedIndexChanged ( object sender , EventArgs e )
    {
        bindGridView(null, DropDownList1.SelectedValue );
    }

浏览页面,通过SQL 事件探察器可以看到在执行 bllExecPro.getCustomerIDList( ) 时实际执行的SQL 语句是： 

select   top   10  customer0_.CustomerID  as  CustomerID3_, customer0_.CompanyName  as  CompanyN2_3_  from  Customers customer0_

在执行 bllExecPro.getCustOrderHistList( customerID ) 时实际执行的SQL语句是：

exec  sp_executesql N ' exec CustOrderHist @p0 ' , N ' @p0 nvarchar(5) ' ,  @p0   =  N ' 对应的customerID '

 

 

原文：http://space.itpub.net/?uid-12639172-action-viewspace-itemid-182250