化零为整WCF(11) - 会话状态(Session)

[索引页]
[源码下载]


化零为整WCF(11) - 会话状态(Session)


作者: webabcd


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"   />
    
&nbsp;
    
< asp:Button  ID ="btnCounter"  runat ="server"  Text ="Counter"  OnClick ="btnCounter_Click"   />
    
&nbsp;
    
< asp:Button  ID ="btnGetSessionId"  runat ="server"  Text ="GetSessionId"  OnClick ="btnGetSessionId_Click"   />
    
&nbsp;
    
< 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


OK
[源码下载]

你可能感兴趣的:(session)