SilverLight学习笔记--Silverlight中WebService通讯

本文我们学习如何在Silverlight中使用WebService进行通讯。
新建项目Silverlight应用程序，命名为：SLWebService。
在服务器端我们需要做两项目工作:
1、在Web项目中新建一个类Person，我们将在WebService中返回它的实例化对象。Person类定义如下:

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace SLWebService.Web
{
public class Person
{
public string Name { get ; set ; }
public int Age { get ; set ; }
}
}

2、在Web项目中建立一个WebService,命名为MySLWebService.asmx,它的主要任务就是返回一个Person类数组,代码如下:
 

1、建立用户界面.Page.xaml代码如下:

 

Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace SLWebService.Web
{
/// <summary>
/// MySLWebService 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolBoxItem(false)]
// 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
// [System.Web.Script.Services.ScriptService]
public class MySLWebService : System.Web.Services.WebService
{

[WebMethod]
public string HelloWorld()
{
return "Hello World";
}

[WebMethod]
public Person[] GetPeople()
{
List<Person> People = new List<Person>()
{
new Person{ Name="Jack",Age=12},
new Person{ Name="Tom",Age=22},
new Person{ Name="Simon",Age=32},
new Person{ Name="Richard",Age=26}
};

return People.ToArray();
}

}
}

在客户端我们需要做如下工作:

 

< UserControl x:Class = " SLWebService.Page "
xmlns = " http://schemas.microsoft.com/winfx/2006/xaml/presentation "
xmlns:x = " http://schemas.microsoft.com/winfx/2006/xaml "
Width = " 400 " Height = " 300 " >
< StackPanel Width = " 400 " Height = " 300 " Background = " Wheat " >
< TextBlock Text = " 通过WebService取得的数据如下 " TextAlignment = " Center " Foreground = " Red " FontSize = " 18 " ></ TextBlock >
< Button x:Name = " btnGetWebService " Width = " 200 " Height = " 30 " Content = " 获取数据

" Click = " btnGetWebService_Click " ></ Button >
< ListBox x:Name = " People " Width = " 300 " Height = " 200 " Margin = " 20 " >
< ListBox.ItemTemplate >
< DataTemplate >
< StackPanel Orientation = " Vertical " >
< StackPanel Orientation = " Horizontal " >
< TextBlock Text = " 姓名 " Width = " 100 " Foreground = " Blue " ></ TextBlock >
< TextBlock Text = " 年龄 " Width = " 100 " Foreground = " DarkBlue " ></ TextBlock >
</ StackPanel >
< StackPanel Orientation = " Horizontal " >
< TextBlock Text = " {Binding Name} " Foreground = " Red " Width = " 100 " ></ TextBlock >
< TextBlock Text = " {Binding Age} " Foreground = " Green " Width = " 100 " ></ TextBlock >
</ StackPanel >
</ StackPanel >
</ DataTemplate >
</ ListBox.ItemTemplate >
</ ListBox >
</ StackPanel >
</ UserControl >

界面如下:
 

2、在Silverlight项目中引用服务器端的WebService，命名为MyWebServiceRef。

引用后，程序如下图:

3、在客户端使用WebService，通过WebService从服务器端取得数据，在本地处理后显示在用房界面上。Page.xaml.cs代码如下:

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using SLWebService.MyWebServiceRef; // 加入对MyWebServiceRef的引用


namespace SLWebService
{
public partial class Page : UserControl
{
public Page()
{
InitializeComponent();
}

private void btnGetWebService_Click( object sender,RoutedEventArgs e)
{
// 使用WebService从服务器端得到数据并在本地端进行处理
MySLWebServiceSoapClient client = new MySLWebServiceSoapClient();
client.GetPeopleCompleted += new EventHandler < GetPeopleCompletedEventArgs > (client_GetPeopleCompleted);

client.GetPeopleAsync();
}

void client_GetPeopleCompleted( object sender,GetPeopleCompletedEventArgs e)
{
if (e.Error == null )
{
People.ItemsSource = e.Result; // 绑定结果到UI的List控件
}
}

}
}

效果如下图:

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本文程序在Silverlight2.0和VS2008环境中调试通过。本文参照了部分网络资料，希望能够抛砖引玉，大家共同学习。

http://www.cnblogs.com/wsdj-ITtech/archive/2009/08/28/1555525.html