• WCF 及 Silverlight 中使用 Session


    WCF 中 使用 Session

    1.标记WCF服务开启Session模式,使用SessionMode 来使Session有效化

    [ServiceContract(SessionMode = SessionMode.Required)]

     

    2.服务类添加ASPNETSESSION兼容标记

    [System.ServiceModel.Activation.AspNetCompatibilityRequirements(RequirementsMode = System.ServiceModel.Activation.AspNetCompatibilityRequirementsMode.Required)]

     
     
    using 
    System;
    using System.Linq;
    using System.Runtime.Serialization;
    using System.ServiceModel;
    using System.ServiceModel.Activation;
    using System.Collections.Generic;
    using System.Text;



    namespace Service
    {
    [ServiceContract (SessionMode = SessionMode .Required)]
    [AspNetCompatibilityRequirements (RequirementsMode = System.ServiceModel.Activation.AspNetCompatibilityRequirementsMode .Required)]
    public partial class Service
    {
    }
    }

    3.配置WEB.CONFIG文件中<system.serviceModel>节
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true"></serviceHostingEnvironment>

    <!--
    WCF Siverlight 配置
    -->
    <
    system.serviceModel >

    <
    behaviors >
    <
    serviceBehaviors >
    <
    behavior name = ".Service.ServiceBehavior ">
    <
    serviceMetadata httpGetEnabled = "true " />
    <
    serviceDebug includeExceptionDetailInFaults = "false " />
    </
    behavior >
    </
    serviceBehaviors >
    </
    behaviors >
    <
    bindings >
    <
    customBinding >
    <
    binding name = "customBinding0 ">
    <
    binaryMessageEncoding />
    <
    httpTransport >
    <
    extendedProtectionPolicy policyEnforcement = "Never " />
    </
    httpTransport >
    </
    binding >
    </
    customBinding >
    </
    bindings >
    <
    serviceHostingEnvironment aspNetCompatibilityEnabled = "true " /> <!--这里配置-->
    <
    services >
    <
    service behaviorConfiguration = ".Service.ServiceBehavior " name = ".Service.Service ">
    <
    endpoint address = "" binding = "customBinding " bindingConfiguration = "customBinding0 " contract = ".Service.Service " />
    <
    endpoint address = "mex " binding = "mexHttpBinding " contract = "IMetadataExchange " />
    </
    service >
    </
    services >
    </
    system.serviceModel >

    网络资源:

    WCF状态保存分为两步:

    (1) 使用SessionMode 来使Session有效化

    1. [ServiceContract(SessionMode
      SessionMode=SessionMode.Required)]  
    2. public interface ICalculator  
    3. {  
    4. [OperationContract(IsOneWay=true)]  
    5. void Adds(double x);  
    6. [OperationContract]  
    7. double GetResult();  
    8. }

    (2)ServiceBehavior 里面利用参数InstanceContextMode设定到底使用哪一种Session方式

    1. [ServiceBehavior(InstanceContextMode
      InstanceContextMode=InstanceContextMode.PerCall)]  
    2. public class CalculatorService:ICalculator  
    3. {  }

    WCF状态保存SessionMode 有三种值:
    (1)Allowed 默认选值,允许但不强制使用Session
    (2)Required 强制使用Session
    (3)NotAllowed 不允许使用Session

    WCF状态保存InstanceContextMode 有三种值:
    (1) Percall 为user的每一次调用生成一个SessionID
    生命周期:调用开始 ---->调用结束,这种情况和不使用Session是一样的
    (2) PerSession 为每个用户生成一个SessionID
    生命周期:客户端代理生成--->客户端代理关闭 和最原先的Session是一样的
    (3) Seigle 生成唯一的SessionID,所有的用户共享 从host创建---->host 关闭,和Application 一样

    在 Silverlight中使用SESSION

    首先Session是运行在服务器上的,而Silverlight运行在客户端。因此在Silverlight中使用SESSION的说法并不准 确,

    只因大家经常这样搜索才起这个名字。

    有两种方法实现Silverlight与Session的关联:

    方法一、通过WCF使用ASP.NET中的Session[因BasicHttpBinding不支持WCF中的Session,如使用WCF会话 将报错 ]

      首先:在web.config中<system.serviceModel >下添加:

        <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>

      然后:在服务类[不是接口]下添加如下属性:

        [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]

      接下来就可以使用Session记得添加System.Web的引用

        HttpContext.Current.Session["YourName"] = something;

        object something = HttpContext.Current.Session["YourName"];

    方法二、在客户端新建一个静态类模拟Session

      如要保存登陆信息,可在验证了用户名、密码之后在客户端保存相关信息。

    using System;
    using System.Collections.Generic;
    namespace SessionDemo
    {
    public static class SessionManager
        {
    private static Dictionary<string, object> session = new Dictionary<string, object>();
    public static Dictionary<string, object> Session
            {
    get { return SessionManager.session; }
    set { SessionManager.session = value; }
            }
        }
    }

    使用方法:

    赋值:
    SessionManager.Session["uname"] = "kunal";
    取值:
    txbUname.Text = SessionManager.Session["uname"].ToString();

    介绍
    WCF(Windows Communication Foundation) - 会话状态:
    ServiceContract
    ·SessionMode.Allowed - 指定当传入绑定支持会话时,协定也支持会话(默认值)
    ·SessionMode.Required - 指定协定需要会话绑定。如果绑定并未配置为支持会话,则将引发异常
    ·SessionMode.NotAllowed - 指定协定永不支持启动会话的绑定
    OperationContract
    ·IsInitiating - 获取或设置一个值,该值指示方法是否实现可在服务器上启动会话(如果存在会话)的操作。
    ·IsTerminating - 获取或设置一个值,该值指示服务操作在发送答复消息(如果存在)后,是否会导致服务器关闭会话。


    示例
    1、服务
    IHello.cs
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

    using System.ServiceModel;

    namespace WCF.ServiceLib.SessionManagement
    {
    /**//// <summary>
    /// 演示会话状态的接口
    /// </summary>NotAllowed
    /// <remarks>
    /// SessionMode - 获取或设置是否允许、不允许或要求会话
    /// SessionMode.Allowed - 指定当传入绑定支持会话时,协定也支持会话(默认值)
    /// SessionMode.Required - 指定协定需要会话绑定。如果绑定并未配置为支持会话,则将引发异常
    /// SessionMode.NotAllowed - 指定协定永不支持启动会话的绑定
    /// </remarks>
    [ServiceContract(SessionMode = SessionMode.Required)]
    public interface IHello
    {
    /**//// <summary>
    /// 初始化Session
    /// </summary>
    /// <remarks>
    /// IsInitiating - 获取或设置一个值,该值指示方法是否实现可在服务器上启动会话(如果存在会话)的操作。
    /// IsTerminating - 获取或设置一个值,该值指示服务操作在发送答复消息(如果存在)后,是否会导致服务器关闭会话。
    /// </remarks>
    [OperationContract(IsInitiating = true, IsTerminating = false)]
    void StartSession();

    /**//// <summary>
    /// 结束Session
    /// </summary>
    [OperationContract(IsInitiating = false, IsTerminating = true)]
    void StopSession();

    /**//// <summary>
    /// 获取计数器结果
    /// </summary>
    /// <returns></returns>
    [OperationContract(IsInitiating = false, IsTerminating = false)]
    int Counter();

    /**//// <summary>
    /// 获取SessionId
    /// </summary>
    /// <returns></returns>
    [OperationContract(IsInitiating = false, IsTerminating = false)]
    string GetSessionId();
    }
    }

    Hello.cs
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

    using System.ServiceModel;

    namespace WCF.ServiceLib.SessionManagement
    {
    /**//// <summary>
    /// 演示会话状态的接口
    /// </summary>
    /// <remarks>
    /// InstanceContextMode - 获取或设置指示新服务对象何时创建的值。
    /// InstanceContextMode.PerSession - 为每个会话创建一个新的 System.ServiceModel.InstanceContext 对象。
    /// InstanceContextMode 的默认值为 InstanceContextMode.PerSession
    /// </remarks>
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
    public class Hello : IHello
    {
    private int _counter;

    /**//// <summary>
    /// 初始化Session
    /// </summary>
    public void StartSession()
    {
    _counter = 0;
    }

    /**//// <summary>
    /// 结束Session
    /// </summary>
    public void StopSession()
    {
    _counter = 0;
    }

    /**//// <summary>
    /// 获取计数器结果
    /// </summary>
    /// <returns></returns>
    public int Counter()
    {
    _counter++;

    return _counter;
    }

    /**//// <summary>
    /// 获取SessionId
    /// </summary>
    /// <returns></returns>
    public string GetSessionId()
    {
    return OperationContext.Current.SessionId;
    }
    }
    }


    2、宿主
    Hello.svc
    <%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.SessionManagement.Hello" %>
    Web.config
    <?xml version="1.0"?>
    <configuration>
    <system.serviceModel>
    <behaviors>
    <serviceBehaviors>
    <behavior name="SessionManagementBehavior">
    <!--httpGetEnabled - 使用get方式提供服务-->
    <serviceMetadata httpGetEnabled="true" />
    <serviceDebug includeExceptionDetailInFaults="true"/>
    </behavior>
    </serviceBehaviors>
    </behaviors>
    <services>
    <!--name - 提供服务的类名-->
    <!--behaviorConfiguration - 指定相关的行为配置-->
    <service name="WCF.ServiceLib.SessionManagement.Hello" behaviorConfiguration="SessionManagementBehavior">
    <!--address - 服务地址-->
    <!--binding - 通信方式-->
    <!--contract - 服务契约-->
    <!--bindingConfiguration - 指定相关的绑定配置-->
    <endpoint address="" binding="wsHttpBinding" contract="WCF.ServiceLib.SessionManagement.IHello" bindingConfiguration="SessionManagementBindingConfiguration"/>
    </service>
    </services>
    <bindings>
    <wsHttpBinding>
    <!--wsHttpBinding 可提供 安全会话 和 可靠会话-->
    <!--receiveTimeout - 在传输引发异常之前可用于完成读取操作的时间间隔(此处可认为是Session过期时间)-->
    <binding name="SessionManagementBindingConfiguration" receiveTimeout="00:00:10">
    <!--指示是否在通道终结点之间建立 WS-RM (WS-ReliableMessaging) 可靠会话。默认值为 false。-->
    <reliableSession enabled="true"/>
    <security>
    <!--此属性控制安全上下文令牌是否通过客户端与服务之间的 WS-SecureConversation 交换建立。将它设置为 true 要求远程方支持 WS-SecureConversation。-->
    <message establishSecurityContext="true"/>
    </security>
    </binding>
    </wsHttpBinding>
    </bindings>
    </system.serviceModel>
    </configuration>


    3、客户端
    Hello.aspx
    <%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Hello.aspx.cs"
    Inherits="InstanceMode_Hello" Title="会话状态(Session)" %>

    <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
    </asp:Content>
    <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <asp:Button ID="btnStartSession" runat="server" Text="StartSession" OnClick="btnStartSession_Click" />   <asp:Button ID="btnCounter" runat="server" Text="Counter" OnClick="btnCounter_Click" />   <asp:Button ID="btnGetSessionId" runat="server" Text="GetSessionId" OnClick="btnGetSessionId_Click" />   <asp:Button ID="btnStopSession" runat="server" Text="StopSession" OnClick="btnStopSession_Click" />
    </asp:Content>

    Hello.aspx.cs
    using System;
    using System.Collections;
    using System.Configuration;
    using System.Data;
    using System.Linq;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.HtmlControls;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Xml.Linq;

    public partial class InstanceMode_Hello : System.Web.UI.Page
    {
    SessionManagemenSvc.HelloClient _proxy = null;

    protected void Page_Load(object sender, EventArgs e)
    {
    if (Session["proxy"] == null)
    Session["proxy"] = new SessionManagemenSvc.HelloClient();

    _proxy = Session["proxy"] as SessionManagemenSvc.HelloClient;
    }

    protected void btnStartSession_Click(object sender, EventArgs e)
    {
    _proxy.StartSession();
    }

    protected void btnCounter_Click(object sender, EventArgs e)
    {
    Page.ClientScript.RegisterStartupScript(
    this.GetType(),
    "js",
    string.Format("alert('计数器:{0}')", _proxy.Counter()),
    true);
    }

    protected void btnGetSessionId_Click(object sender, EventArgs e)
    {
    Page.ClientScript.RegisterStartupScript(
    this.GetType(),
    "js",
    string.Format("alert('SessionId:{0}')", _proxy.GetSessionId()),
    true);
    }

    protected void btnStopSession_Click(object sender, EventArgs e)
    {
    _proxy.StopSession();
    }
    }

    Web.config
    <?xml version="1.0"?>
    <configuration>
    <system.serviceModel>
    <client>
    <!--address - 服务地址-->
    <!--binding - 通信方式-->
    <!--contract - 服务契约-->
    <!--bindingConfiguration - 指定相关的绑定配置-->
    <endpoint address="http://localhost:3502/ServiceHost/SessionManagement/Hello.svc " binding="wsHttpBinding" contract="SessionManagemenSvc.IHello" bindingConfiguration="SessionManagementBindingConfiguration" />
    </client>
    <bindings>
    <wsHttpBinding>
    <binding name="SessionManagementBindingConfiguration">
    <!--指示是否在通道终结点之间建立 WS-RM (WS-ReliableMessaging) 可靠会话。默认值为 false。-->
    <reliableSession enabled="true"/>
    <security>
    <!--此属性控制安全上下文令牌是否通过客户端与服务之间的 WS-SecureConversation 交换建立。将它设置为 true 要求远程方支持 WS-SecureConversation。-->
    <message establishSecurityContext="true"/>
    </security>
    </binding>
    </wsHttpBinding>
    </bindings>
    </system.serviceModel>
    </configuration>


    运行结果:
    单击"btnStartSession"按钮,初始化Session
    单击"btnCounter"按钮,Session级别的计数器累加
    单击"btnGetSessionId"按钮,获取当前Session的SessionId
    单击"btnStopSession"按钮,终止Session

    注:
    Host中的wsHttpBinding配置的receiveTimeout属性为Session的过期时间
    作者:Angelo Lee
    本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利.
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  • 原文地址:https://www.cnblogs.com/yefengmeander/p/2887785.html
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