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Flex与.NET互操作(七)：了解FluorineFx的环境配置（远程对象、网关、通道、目的地）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>
- 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}"/>
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 }
- 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:Script>
- 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:Script>
- 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
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