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Silverlight通过httpBinding访问IIS宿主WCF

Jun 07, 2016 pm 03:11 PM
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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

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 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>
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Student.cs 代码

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 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>
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类库LxServices:( 改类库包括一个模仿获取数据库集合类StudentList.cs和服务类StudentService.cs)

StudentList.cs

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 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>
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StudentService 代码

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 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>
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站点WcfHost.web

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:

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 2、修改webconfig 文件,代码如下:

WebConfig

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<?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>
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注意:endpoint中的address 为空:因为svc文件的地址就是元数据发布的地址。

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

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<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>
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MainPage.cs 代码

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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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运行结果:

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>
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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

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