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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       
以上内容出自网络,并非原创      

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