Flex与.NET互操作(八)：使用FluorineFx网关实现远程访问-阿里云开发者社区

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         /// <summary>
7         /// 返回一个简单对象
8         /// </summary>
9         /// <returns></returns>
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         /// <summary>
22         /// 返回DataTable对象
23         /// </summary>
24         /// <returns></returns>
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         /// <summary>
52         /// 返回DataSet对象
53         /// </summary>
54         /// <returns></returns>
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<mx:RemoteObject>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

本文转自 beniao 51CTO博客，原文链接：http://blog.51cto.com/beniao/137934，如需转载请自行联系原作者

Flex与.NET互操作(八)：使用FluorineFx网关实现远程访问

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