关于远程访问在本系列文章中陆续的写了不少示例了，本文没有准备深入的去探讨，为了巩固FluorineFx网关的学习和使用。于此，本文将使用FluorineFx网关来提供数据服务等多项功能来介绍通过FluorineFx实现远程访问的相关知识点。
     FluorineFx提供的远程访问包括有很多方面的知道点,本文只介绍其中的三个知识点:访问远程对象返回对象,返回DataTable,返回DataSet对象.FluorineFx安装包里自带有相关的示例程序,要学习更多可直接参考这些示例程序.
     在实现访问前我们同样来做一些准备工作，建立好远程对象，如下：
 1 namespace Fluorine.ServiceLibrary
 2 {
 3     public class Book
 4     {
 5         public int Id { get; set; }
 6         public string Name { get; set; }
 7         public string Author { get; set; }
 8         public double Price { get; set; }
 9     }
10 }
 
     下面是提供Flex访问的远程对象：

 1 namespace Fluorine.ServiceLibrary
 2 {
 3     [RemotingService]
 4     public class FluorineService
 5     {
 6         /// 
 7         /// 返回一个简单对象
 8         /// 
 9         /// 
10         public Book GetBook()
11         {
12             return new Book
13             {
14                 Id = 1,
15                 Name = "《三国演义》",
16                 Author = "罗贯中",
17                 Price = 100
18             };
19         }
20 
21         /// 
22         /// 返回DataTable对象
23         /// 
24         /// 
25         [DataTableType("Fluorine.ServiceLibrary.Book")]
26         public DataTable GetDataTable()
27         {
28             DataTable dt = new DataTable("Book");
29             dt.Columns.Add("Id", typeof(int));
30             dt.Columns.Add("Name", typeof(string));
31             dt.Columns.Add("Author", typeof(string));
32             dt.Columns.Add("Price", typeof(double));
33 
34             DataRow dr = dt.NewRow();
35             dr["Id"] = 1;
36             dr["Name"] = "《三国演义》";
37             dr["Author"] = "罗贯中";
38             dr["Price"] = 52.30;
39             dt.Rows.Add(dr);
40 
41             dr = dt.NewRow();
42             dr["Id"] = 2;
43             dr["Name"] = "《西游记》";
44             dr["Author"] = "吴承恩";
45             dr["Price"] = 39.91;
46             dt.Rows.Add(dr);
47 
48             return dt;
49         }
50 
51         /// 
52         /// 返回DataSet对象
53         /// 
54         /// 
55         [DataSetType("Fluorine.ServiceLibrary.Book")]
56         public DataSet GetDataSet()
57         {
58             DataSet ds = new DataSet("DS");
59             DataTable dt = ds.Tables.Add("Books");
60             dt.Columns.Add("Id", typeof(int));
61             dt.Columns.Add("Name", typeof(string));
62             dt.Columns.Add("Author", typeof(string));
63             dt.Columns.Add("Price", typeof(double));
64 
65             DataRow dr = dt.NewRow();
66             dr["Id"] = 1;
67             dr["Name"] = "《三国演义》";
68             dr["Author"] = "罗贯中";
69             dr["Price"] = 52.30;
70             dt.Rows.Add(dr);
71 
72             dr = dt.NewRow();
73             dr["Id"] = 2;
74             dr["Name"] = "《西游记》";
75             dr["Author"] = "吴承恩";
76             dr["Price"] = 39.91;
77             dt.Rows.Add(dr);
78 
79             return ds;
80         }
81 
82     }
83 }
 
     上面代码片段中分别提供了返回一个对象，DataTable,DataSet对象的方法。这里只需要记住两个关键标识就行，它门是：DataTableType和DataSetType.  下面通过Flex的非可视化组件来访问远程对象，OK，下面我们来看看具体怎么来调用。 
1  < mx:RemoteObject id = " ro "  destination = " fluorine "   >
2      source = " Fluorine.ServiceLibrary.FluorineService "
3      fault = " onFaultHandler(event) "
4       < mx:method name = " GetBook "  result = " onGetBookHandler(event) " />
5       < mx:method name = " GetDataTable "  result = " onGetDataTableHandler(event) " />
6       < mx:method name = " GetDataSet "  result = " onGetDataSetHandler(event) " />
7  mx:RemoteObject >
 
一、返回对象示例
1  [Binable]
 2  private  var book:BookVO;
 3      
 4  private  function onGetBookHandler(evt:ResultEvent):void
 5  {
 6      book = evt.result  as  BookVO;
 7  }
 
     通过点击按扭调用远程方法GetBook()完成方法的调用，直接可以将返回结果绑定到界面元素上。
1  < mx:Button label = " Book "  click = " ro.GetBook() " />
2  < mx:TextInput width = " 302 "  text = " {boo.Name+book.Author+book.Price} " />
 
二、返回DataTable对象
     返回DataTable和DataSet，将结果绑定到DataGrid上显示，先看看DataGrid的定义：
1  < mx:DataGrid  x ="10"  y ="10"  width ="543"  height ="147"  dataProvider ="{books}" >
2       < mx:columns >
3               < mx:DataGridColumn  headerText ="编号"  dataField ="Id" />
4               < mx:DataGridColumn  headerText ="书名"  dataField ="Name" />
5               < mx:DataGridColumn  headerText ="作者"  dataField ="Author" />
6               < mx:DataGridColumn  headerText ="价格"  dataField ="Price" />
7       mx:columns >
8  mx:DataGrid >
 
     DataGrid的数据源为定义的一个ArrayCollection对象，详细如下：
1  [Binable]
 2  private var books:ArrayCollection;
 
1  private  function onGetDataTableHandler(evt:ResultEvent):void
 2  {
 3      books = evt.result  as  ArrayCollection;
 4  }
 
 三、返回DataSet对象
1  private  function onGetDataSetHandler(evt:ResultEvent):void
 2  {
 3      books = evt.result  as  ArrayCollection;
 4  }
 
     如上便完成了通过FluorineFx网关来实现远程访问，下面是完整的Flex端代码，实现很简单这里就不作详细讲解：
 1  xml version="1.0" encoding="utf-8" ?>
 2  < mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"  layout ="absolute" >
 3       < mx:. >
 4           [CDATA[
  5              import mx.controls.Alert;
  6              import mx.rpc.events.ResultEvent;
  7              import mx.rpc.events.FaultEvent;
  8              import mx.collections.ArrayCollection;
  9              [Binable]
 10              private var books:ArrayCollection;
 11              [Binable]
 12              private var book:BookVO;
 13              
 14              private function onGetBookHandler(evt:ResultEvent):void
 15              {
 16                  book=evt.result as BookVO;
 17              }
 18              
 19              private function onGetDataTableHandler(evt:ResultEvent):void
 20              {
 21                  books=evt.result as ArrayCollection;
 22              }
 23              
 24              private function onGetDataSetHandler(evt:ResultEvent):void
 25              {
 26                  books=evt.result as ArrayCollection;
 27              }
 28              
 29              private function onFaultHandler(evt:FaultEvent):void
 30              {
 31                  Alert.show(evt.fault.faultDetail);
 32              }
 33          ]] >
34       mx:. >
35       < mx:Panel  x ="42"  y ="56"  width ="578"  height ="226"  layout ="absolute"  fontSize ="12" >
36       < mx:DataGrid  x ="10"  y ="10"  width ="543"  height ="147"  dataProvider ="{books}" >
37           < mx:columns >
38                   < mx:DataGridColumn  headerText ="编号"  dataField ="Id" />
39                   < mx:DataGridColumn  headerText ="书名"  dataField ="Name" />
40                   < mx:DataGridColumn  headerText ="作者"  dataField ="Author" />
41                   < mx:DataGridColumn  headerText ="价格"  dataField ="Price" />
42           mx:columns >
43       mx:DataGrid >
44       < mx:ControlBar >
45           < mx:Button  label ="DataTable"  click ="getDataTable()" />
46           < mx:Button  label ="DataSet"  click ="getDataSet()" />
47           < mx:Button  label ="Book"  click ="ro.GetBook()" />
48           < mx:TextInput  width ="302"  text ="{boo.Name+book.Author+book.Price}" />
49       mx:ControlBar >
50       mx:Panel >
51       < mx:RemoteObject  id ="ro"  destination ="fluorine"   >
52          source="Fluorine.ServiceLibrary.FluorineService"
 53          fault="onFaultHandler(event)"
 54           < mx:method  name ="GetBook"  result ="onGetBookHandler(event)" />
55           < mx:method  name ="GetDataTable"  result ="onGetDataTableHandler(event)" />
56           < mx:method  name ="GetDataSet"  result ="onGetDataSetHandler(event)" />
57       mx:RemoteObject >
58  mx:Application >
59