首先看下Flex数据分页查询需要的应用效果

实际功能包括对Customer进行条件和Flex数据分页查询，客户相关国家数据查询。

l        服务端功能处理  
u     根据逻辑定义相关数据操作实体类  
    [Table("Customers")]  
    interface ICustomer  
    {  
        [ID]  
        string CustomerID { get; set; }  
        [Column]  
        string CompanyName { get; set; }  
        [Column]  
       string ContactName { get; set; }  
        [Column]  
        string ContactTitle { get; set; }  
        [Column]  
        string Address { get; set; }  
        [Column]  
        string City { get; set; }  
       [Column]  
        string Region { get; set; }  
        [Column]  
       string PostalCode { get; set; }  
        [Column]  
        string Country { get; set; }  
        [Column]  
        string Phone { get; set; }  
       [Column]  
        string Fax { get; set; }  
    }  
    [Table("Customers",DISTINCT=true)]  
    interface ICountry  
    {  
        [Column("Country")]  
        string Name { get; set; }  
}  
u     定义逻辑方法  
   [Service]  
    public class CustomerService  
    {  
        public IList List(string matchCompanyName,string country, [Output]DataPage datapage)  
        {  
            Expression exp = new Expression();  
            if (!string.IsNullOrEmpty(matchCompanyName))  
                exp &= Customer.contactName.Match(matchCompanyName);  
            if (!string.IsNullOrEmpty(country))  
                exp &= Customer.country == country;  
            datapage.RecordCount = exp.Count();  
            return exp.List(new Region(datapage.PageIndex,datapage.PageSize));  
        }  
        public IList ListCountry()  
        {  
            Expression exp = new Expression();  
            return exp.List();  
        }  
}  
l        Flex功能处理  
u     定义AS逻辑代理方法  
    import Core.Utility;  
    /**  
    * Action Script调用方法生成工具1.0  生成时间:2009-7-27 21:39:39  
    */  
   public dynamic class CustomerService_List  
    {  
       public var Callback:Function;  
       public var matchCompanyName:Object;  
       public var country:Object;  
      public var PageIndex:Object;  
       public var PageSize:Object;  
      public var RecordCount:Object;  
       public var PageCount:Object;  
       public var OrderField:Object;  
       public function Execute(method:String="get"):void  
       {  
           this._TimeSlice = new Date();  
           Utility.CallMethod("CustomerService_List",this,Callback,method);  
       }  
    }  
    import Core.Utility;  
    /**  
    * Action Script调用方法生成工具1.0  生成时间:2009-7-27 21:39:43  
    */  
    public dynamic class CustomerService_ListCountry  
    {  
       public var Callback:Function;  
       public function Execute(method:String="get"):void  
       {  
          this._TimeSlice = new Date();  
           Utility.CallMethod("CustomerService_ListCountry",this,Callback,method);  
       }  
    }  
u     在界面定义逻辑操作对象  
    
        
           [Bindable]  
           private var Customers:Object = new ArrayCollection();  
           [Bindable]  
           private var Countrys:Object = new ArrayCollection();  
           private var getCustomer = new CustomerService_List();  
           private var getCountry = new CustomerService_ListCountry();  
       ]]> 
    mx:Script> 
u     设置国家Combox数据源绑定  
 id="txtCountry"  dataProvider="{Countrys}"    
labelField="Name" editable="true" width="135"   
color="#000000">mx:ComboBox> 
u     设置客户查询数据源绑定  
     dataProvider="{Customers}" width="100%" height="100%"> 
        
            headerText="CustomerID" dataField="CustomerID"/> 
            headerText="CompanyName" dataField="CompanyName"/> 
            headerText="ContactName" dataField="ContactName"/> 
            headerText="ContactTitle" dataField="ContactTitle"/> 
            headerText="Address" dataField="Address"/> 
            headerText="City" dataField="City"/> 
            headerText="Region" dataField="Region"/> 
            headerText="PostalCode" dataField="PostalCode"/> 
            headerText="Country" dataField="Country"/> 
            headerText="Phone" dataField="Phone"/> 
            headerText="Fax" dataField="Fax"/> 
       mx:columns> 
    mx:DataGrid> 
u     在界面初始化事件中定义相关方法加调处理  
     
        
           getCountry.Callback= function(result:XML,err:Boolean){  
                Countrys= result.Data.Country;  
           };  
                 getCustomer.Callback = function(result:XML,err:Boolean){  
              Customers = result.Data.Customer;  
              if(getCustomer.FristSearch)  
             {  
                  dp.Open(getCustomer.PageSize ,result.Properties.datapage.RecordCount)  
              }  
           };  
           getCustomer.PageSize=10;  
           getCustomer.FristSearch = true;  
           getCountry.Execute();  
          getCustomer.Execute();  
       ]]> 
    mx:initialize> 
u     查询按钮相关功能处理  
        label="Search" icon="@Embed(source='Search.png')"> 
            
              
                 getCustomer.FristSearch = true;  
                  getCustomer.matchCompanyName = txtCompanyName.text;  
                  getCustomer.country = txtCountry.text;  
                  getCustomer.PageIndex =0;  
                  getCustomer.Execute();  
              ]]> 
           mx:click> 
    mx:Button> 

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