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>
WCF状态保存分为两步:
(1) 使用SessionMode 来使Session有效化
- [ServiceContract(SessionMode
SessionMode=SessionMode.Required)] - public interface ICalculator
- {
- [OperationContract(IsOneWay=true)]
- void Adds(double x);
- [OperationContract]
- double GetResult();
- }
(2)ServiceBehavior 里面利用参数InstanceContextMode设定到底使用哪一种Session方式
- [ServiceBehavior(InstanceContextMode
InstanceContextMode=InstanceContextMode.PerCall)] - public class CalculatorService:ICalculator
- { }
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
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