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silverlight和wcf通信是大家开发中用得相对较多的东西,我以Silverlight 通过 httpBinding 访问 IIS 宿主 WCF 来简单介绍一下。 Silverlight 通过 httpBiding方式 访问 IIS 宿主 WCF是我们在Silverlight与WCF通信中最为常见的,也是用的最多的,我们用个很简
silverlight和wcf通信是大家开发中用得相对较多的东西,我以Silverlight通过httpBinding访问IIS宿主WCF 来简单介绍一下。
Silverlight通过httpBiding方式访问IIS宿主WCF是我们在Silverlight与WCF通信中最为常见的,也是用的最多的,我们用个很简单的例子进行演示。
项目结构:
项目目结构简单说明:
程序集名称 | 需添加的引用 | 简要说明 |
LxContracts | System.Runtime.Serialization System.ServiceModel | 用于存放操作契约与数据契约 |
LxServices | LxContracts[项目] | 服务,操作契约的实现 |
WcfHost.web | LxContracts[项目] 和LxServices[项目] | 利用Svc文件发布服务的站点 |
SilverlightDemo | Silverlight程序,调用WCF服务 |
注意:建立Silverlight程序的时候,不需要承载网站,建立一个单一的Silverlight程序即可,这样做的原因是,把Silverlight和WCF服务不放到同一个站点下面,是为了演示跨域的问题。
代码实现:
类库LxContracts:(包括数据契约Student.cs和操作契约IStudent.cs)
Student.cs 代码
代码如下 | 复制代码 |
using<span> System; </span>using<span> System.Collections.Generic; </span>using<span> System.Linq; </span>using<span> System.Text; </span>using<span> System.ServiceModel; </span>using<span> System.Runtime.Serialization; </span>namespace<span> LxContracts { [DataContract] </span>public class<span> Student { </span>/// <summary> ///<span> 学生编号 </span>/// </summary> <span> [DataMember] </span>public int StuId { get; set<span>; } </span>/// <summary> ///<span> 学生姓名 </span>/// </summary> <span> [DataMember] </span>public string StuName { get; set<span>; } </span>/// <summary> ///<span> 所在班级 </span>/// </summary> <span> [DataMember] </span>public string ClassName { get; set<span>; } </span>/// <summary> ///<span> 联系电话 </span>/// </summary> <span> [DataMember] </span>public string TelPhoneNum { get; set<span>; } } }</span> |
代码如下 | 复制代码 |
using<span> System; </span>using<span> System.Collections.Generic; </span>using<span> System.Linq; </span>using<span> System.Text; </span>using<span> System.Runtime.Serialization; </span>using<span> System.ServiceModel; </span>namespace<span> LxContracts { [ServiceContract] </span>public interface<span> IStudent { [OperationContract] List</span><student><span> GetStudent(); } }</span></student> |
StudentList.cs
代码如下 | 复制代码 |
using<span> System; </span>using<span> System.Collections.Generic; </span>using<span> System.Linq; </span>using<span> System.Text; </span>using<span> LxContracts; </span>namespace<span> LxServices { </span>public class StudentList:List<student><span> { </span>public<span> StudentList() { </span>this.Add(new Student() { StuId = 1, StuName = "小明", ClassName = "计算机一班", TelPhoneNum = "123456"<span> }); </span>this.Add(new Student() { StuId = 2, StuName = "小红", ClassName = "计算机二班", TelPhoneNum = "234567"<span> }); </span>this.Add(new Student() { StuId = 2, StuName = "小兰", ClassName = "计算机三班", TelPhoneNum = "890123"<span> }); } } }</span></student> |
代码如下 | 复制代码 |
using<span> System; </span>using<span> System.Collections.Generic; </span>using<span> System.Linq; </span>using<span> System.Text; </span>using<span> LxContracts; </span>namespace<span> LxServices { </span>public class<span> StudentService:IStudent { </span>public List<student><span> GetStudent() { </span>//<span>实际情况应该为从数据库读取 </span>//本例手动生成一个StudentList StudentList ListStuent = new<span> StudentList(); </span>return<span> ListStuent; } } }</span></student> |
站点WcfHost.web,这是一个Asp.net 空web应用程序。
1、右击” WcfHost.web”—“添加”—“新建项”—“wcf服务”,命名为”StudentSrv.svc” 。如图:
在项目中删除”StudentSrv.svc.cs”文件和”IStudentSrv.cs”文件。右击”StudentSrv.svc”文件,选择”查看标记”,将代码修改为:
2、修改webconfig 文件,代码如下:
WebConfig
代码如下 | 复制代码 |
<?xml version="1.0" encoding="utf-8"?> <configuration> <system.web> <compilation debug="true" targetframework="4.0"></compilation> </system.web> <system.servicemodel> <behaviors> <servicebehaviors> <behavior name="LxBehavior"> <servicemetadata httpgetenabled="true"></servicemetadata> <servicedebug includeexceptiondetailinfaults="false"></servicedebug> </behavior> </servicebehaviors> </behaviors> <services> <service name="LxServices.StudentService" behaviorconfiguration="LxBehavior"> <endpoint address="" binding="basicHttpBinding" contract="LxContracts.IStudent"></endpoint> </service> </services> <!--关闭 ASP.NET 兼容性模式--> <servicehostingenvironment aspnetcompatibilityenabled="false"></servicehostingenvironment> </system.servicemodel> </configuration> |
3、右击”StudentSrv.svc”文件,在”浏览器中查看”,显示如下图,说明服务已经部署好了,我用的端口是 9090:
在Silverlight中进行调用:
Silverlight调用wcf很简单,直接在”SilverlightDemo”中添加”服务引用即可”,Silverlight项目中会自动生成” ServiceReferences.ClientConfig”配置文件,当然也可以利用代码的方式调用,但是我比较懒 :)。
1、为Silverlight程序添加WCF:
“右击”—“SiverlightDemo”—“添加服务引用”—“输入服务地址”(我的是http://localhost:9090/WCF/StudentSrv.svc)--点击“前往”,就会找到服务,命名为“WCF.StudentSrv”后,点击“确定”
2、在Silverlight中调用WCF:
MainPage.xaml中添加”DataGrid”控件,xaml代码如下:
MainPage.xaml 代码
代码如下 | 复制代码 |
<datagrid x:name="dgStudnet" grid.row="0" autogeneratecolumns="False"> <datagrid.columns> <datagridtextcolumn header="学生编号" width="80" binding="{Binding StuId}"></datagridtextcolumn> <datagridtextcolumn header="学生姓名" width="100" binding="{Binding StuName}"></datagridtextcolumn> <datagridtextcolumn header="所在班级" width="120" binding="{Binding ClassName}"></datagridtextcolumn> <datagridtextcolumn header="电话号码" width="100" binding="{Binding TelPhoneNum}"></datagridtextcolumn> </datagrid.columns> </datagrid> |
代码如下 | 复制代码 |
public partial class<span> MainPage : UserControl { ObservableCollection</span><student><span> listStudent; </span>public<span> MainPage() { InitializeComponent(); listStudent </span>= new ObservableCollection<student><span>(); </span>this.Loaded += new<span> RoutedEventHandler(MainPage_Loaded); } </span>void MainPage_Loaded(object<span> sender, RoutedEventArgs e) { StudentClient proxyClient </span>= new<span> StudentClient(); proxyClient.GetStudentAsync(); proxyClient.GetStudentCompleted </span>+= new EventHandler<getstudentcompletedeventargs><span>(proxyClient_GetStudentCompleted); } </span>void proxyClient_GetStudentCompleted(object<span> sender, GetStudentCompletedEventArgs e) { </span>if (e.Error == null<span>) { listStudent </span>=<span> e.Result; </span>this.dgStudnet.ItemsSource =<span> listStudent; } } }</span></getstudentcompletedeventargs></student></student>
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将” SilverlightDemo”设置为启动项目,运行,会产生下面的异常:
这就是因为当时建立项目的时候没有把Silverlight程序和WCF服务放到同一个站点的缘故,因此需要在发布WCF的网站根目录放置一个跨域文件:clientaccesspolicy.xml
clientaccesspolicy.xml
<?xml version="1.0" encoding="utf-8"?> <access-policy> <cross-domain-access> <policy> <allow-from http-request-headers="SOAPAction"> <domain uri="*"></domain> </allow-from> <grant-to> <resource path="/" include-subpaths="true"></resource> </grant-to> </policy> </cross-domain-access> </access-policy>
再次运行,结果如下图所示:
至此,Silverlight通过httbBingding方式访问IIS宿主的WCF的演示我们就进行到这里