一起谈.NET技术，Flex 数据访问 WebService （上）

[WebMethod]
public DataTable GetDataTable()
{
DataTable dt = new DataTable( " Employees " );
dt.Columns.Add( " id " , typeof ( int ));
dt.Columns.Add( " name " , typeof ( string ));
dt.Columns.Add( " age " , typeof ( int ));

DataRow dr = dt.NewRow();
dr[ " id " ] = 1 ;
dr[ " name " ] = " Shawn " ;
dr[ " age " ] = 25 ;
dt.Rows.Add(dr);

dr = dt.NewRow();
dr[ " id " ] = 2 ;
dr[ " name " ] = " Jack " ;
dr[ " age " ] = 23 ;
dt.Rows.Add(dr);

return dt;
}

<? xml version="1.0" encoding="utf-8" ?>
< mx:Application xmlns:mx ="http://www.adobe.com/2006/mxml" layout ="absolute" >
< mx:Script >
<![CDATA[
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.controls.Alert;
private function onResult(event:ResultEvent):void
{
}
private function onFault(event:FaultEvent):void
{
Alert.show("调+event.message);
}
private function GetDataTable():void
{
this.MyService.GetDataTable.send();
}
]]>
</ mx:Script >
< mx:Panel width ="400" >
< mx:DataGrid id ="gvEmployee" dataProvider ="{this.MyService.GetDataTable.lastResult.Tables.Employees.Rows}" width ="100%" >
< mx:columns >
< mx:DataGridColumn headerText ="ID" dataField ="id" />
< mx:DataGridColumn headerText ="Name" dataField ="name" />
< mx:DataGridColumn headerText ="Age" dataField ="age" />
</ mx:columns >
</ mx:DataGrid >
< mx:ControlBar >
< mx:Button label ="Get DataTable" click ="GetDataTable()" />
</ mx:ControlBar >
</ mx:Panel >
< mx:WebService id ="MyService" wsdl ="http://localhost:4081/Flex.asmx?WSDL" useProxy ="false" result ="onResult(event)" fault ="onFault(event)" >
< mx:operation name ="GetDataTable" />
</ mx:WebService >
</ mx:Application >  

[WebMethod]
public List < Employee > GetEmployeeList()
{
return new List < Employee >
{
new Employee
{
id = 1 ,
name = " Shawn " ,
age = 25
},
new Employee
{
id = 2 ,
name = " Jack " ,
age = 23
}
};
}

<? xml version="1.0" encoding="utf-8" ?>
< mx:Application xmlns:mx ="http://www.adobe.com/2006/mxml" layout ="absolute" >
< mx:Script >
<![CDATA[
import mx.collections.ArrayCollection;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.controls.Alert;
private function onResult(event:ResultEvent):void
{
var arr:ArrayCollection = this.MyService.GetEmployeeList.lastResult as ArrayCollection;
gvEmployee.dataProvider=arr;
}

private function onFault(event:FaultEvent):void
{
Alert.show("调+event.message);
}

private function GetEmployeeList():void
{
this.MyService.GetEmployeeList.send();
}
]]>
</ mx:Script >

< mx:Panel width ="400" >
< mx:DataGrid id ="gvEmployee" width ="100%" >
< mx:columns >
< mx:DataGridColumn headerText ="ID" dataField ="id" />
< mx:DataGridColumn headerText ="Name" dataField ="name" />
< mx:DataGridColumn headerText ="Age" dataField ="age" />
</ mx:columns >
</ mx:DataGrid >
< mx:ControlBar >
< mx:Button label ="Get List" click ="GetEmployeeList()" />
</ mx:ControlBar >
</ mx:Panel >
< mx:WebService id ="MyService" wsdl ="http://localhost:4081/Flex.asmx?WSDL" useProxy ="false" result ="onResult(event)" fault ="onFault(event)" >
< mx:operation name ="GetEmployeeList" />
</ mx:WebService >
</ mx:Application >