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 程式師世界 >> 編程語言 >> .NET網頁編程 >> 關於.NET >> WCF示例(10) - 實例模型(InstanceContextMode)

WCF示例(10) - 實例模型(InstanceContextMode)

編輯:關於.NET

介紹

WCF(Windows Communication Foundation) - 實例模型:

ServiceBehavior

·InstanceContextMode.PerCall - 新的 System.ServiceModel.InstanceContext 對象在每次調用前創建,在調用後回收。

·InstanceContextMode.PerSession - 為每個會話創建一個新的 System.ServiceModel.InstanceContext 對象。

·InstanceContextMode.Single - 只有一個 System.ServiceModel.InstanceContext 對象用於所有傳入呼叫,並且在調用後不回收。如果服務對象不存在,則創建一個。

示例

1、服務

PerCallMode.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
  
using System.ServiceModel;
  
namespace WCF.ServiceLib.InstanceMode
{
  /**//// <summary>
  /// 演示實例模型的接口(PerCall)
  /// </summary>
  [ServiceContract]
  public interface IPerCallMode
  {
    /**//// <summary>
    /// 獲取計數器結果
    /// </summary>
    /// <returns></returns>
    [OperationContract]
    int Counter();
  }
  
  /**//// <summary>
  /// 演示實例模型的類(PerCall)
  /// </summary>
  /// <remarks>
  /// InstanceContextMode - 獲取或設置指示新服務對象何時創建的值。
  /// InstanceContextMode.PerCall - 新的 System.ServiceModel.InstanceContext 對象在每次調用前創建,在調用後回收。
  /// </remarks>
  [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
  public class PerCallMode : IPerCallMode
  {
    private int _counter;
  
    /**//// <summary>
    /// 獲取計數器結果
    /// </summary>
    /// <returns></returns>
    public int Counter()
    {
      _counter++;
  
      return _counter;
    }
  }
}

PerSessionMode.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
  
using System.ServiceModel;
  
namespace WCF.ServiceLib.InstanceMode
{
  /**//// <summary>
  /// 演示實例模型的接口(PerSession)
  /// </summary>
  [ServiceContract()]
  public interface IPerSessionMode
  {
    /**//// <summary>
    /// 獲取計數器結果
    /// </summary>
    /// <returns></returns>
    [OperationContract]
    int Counter();
  }
  
  /**//// <summary>
  /// 演示實例模型的類(PerCall)
  /// </summary>
  /// <remarks>
  /// InstanceContextMode - 獲取或設置指示新服務對象何時創建的值。
  /// InstanceContextMode.PerSession - 為每個會話創建一個新的 System.ServiceModel.InstanceContext 對象。
  /// InstanceContextMode 的默認值為 InstanceContextMode.PerSession
  /// </remarks>
  [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
  public class PerSessionMode : IPerSessionMode
  {
    private int _counter;
  
    /**//// <summary>
    /// 獲取計數器結果
    /// </summary>
    /// <returns></returns>
    public int Counter()
    {
      _counter++;
  
      return _counter;
    }
  }
}

SingleMode.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
  
using System.ServiceModel;
  
namespace WCF.ServiceLib.InstanceMode
{
  /**//// <summary>
  /// 演示實例模型的接口(Single)
  /// </summary>
  [ServiceContract]
  public interface ISingleMode
  {
    /**//// <summary>
    /// 獲取計數器結果
    /// </summary>
    /// <returns></returns>
    [OperationContract]
    int Counter();
  }
  
  /**//// <summary>
  /// 演示實例模型的接口(Single)
  /// </summary>
  /// <remarks>
  /// InstanceContextMode - 獲取或設置指示新服務對象何時創建的值。
  /// InstanceContextMode.Single - 只有一個 System.ServiceModel.InstanceContext 對象用於所有傳入呼叫,並且在調用後不回收。如果服務對象不存在,則創建一個。
  /// </remarks>
  [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
  public class SingleMode : ISingleMode
  {
    private int _counter;
  
    /**//// <summary>
    /// 獲取計數器結果
    /// </summary>
    /// <returns></returns>
    public int Counter()
    {
      _counter++;
  
      return _counter;
    }
  }
}

2、宿主

PerCallMode.svc

<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.InstanceMode.PerCallMode" %>

PerSessionMode.svc

<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.InstanceMode.PerSessionMode" %>

SingleMode.svc

<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.InstanceMode.SingleMode" %>

Web.config

<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="InstanceModeBehavior">
          <!--httpGetEnabled - 使用get方式提供服務-->
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
      <!--name - 提供服務的類名-->
      <!--behaviorConfiguration - 指定相關的行為配置-->
      <service name="WCF.ServiceLib.InstanceMode.PerCallMode" behaviorConfiguration="InstanceModeBehavior">
        <!--address - 服務地址-->
        <!--binding - 通信方式-->
        <!--contract - 服務契約-->
        <endpoint address="" binding="basicHttpBinding" contract="WCF.ServiceLib.InstanceMode.IPerCallMode" />
      </service>
      <service name="WCF.ServiceLib.InstanceMode.PerSessionMode" behaviorConfiguration="InstanceModeBehavior">
        <!--bindingConfiguration - 指定相關的綁定配置-->
        <endpoint address="" binding="wsHttpBinding" contract="WCF.ServiceLib.InstanceMode.IPerSessionMode" bindingConfiguration="PerSessionModeBindingConfiguration"/>
      </service>
      <service name="WCF.ServiceLib.InstanceMode.SingleMode" behaviorConfiguration="InstanceModeBehavior">
        <endpoint address="" binding="basicHttpBinding" contract="WCF.ServiceLib.InstanceMode.ISingleMode" />
      </service>
    </services>
    <bindings>
      <wsHttpBinding>
        <!--wsHttpBinding 可提供 安全會話 和 可靠會話-->
        <binding name="PerSessionModeBindingConfiguration">
          <!--指示是否在通道終結點之間建立 WS-RM (WS-ReliableMessaging) 可靠會話。默認值為 false。-->
          <reliableSession enabled="true"/>
          <security>
            <!--此屬性控制安全上下文令牌是否通過客戶端與服務之間的 WS-SecureConversation 交換建立。將它設置為 true 要求遠程方支持 WS-SecureConversation。-->
            <message establishSecurityContext="true"/>
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>
  </system.serviceModel>
</configuration>

3、客戶端

Hello.aspx

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Hello.aspx.cs"
  Inherits="InstanceMode_Hello" Title="實例模型(InstanceContextMode)" %>
  
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
  <asp:Button ID="btnPerCallMode" runat="server" Text="PerCallMode"
    onclick="btnPerCallMode_Click" />
  &nbsp;
  <asp:Button ID="btnPerSessionMode" runat="server" Text="PerSessionMode"
    onclick="btnPerSessionMode_Click" />
  &nbsp;
  <asp:Button ID="btnSingleMode" runat="server" Text="SingleMode"
    onclick="btnSingleMode_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
{
  protected void Page_Load(object sender, EventArgs e)
  {
  
  }
  
  protected void btnPerCallMode_Click(object sender, EventArgs e)
  {
  
    var proxy = new InstanceModeSvc.PerCallMode.PerCallModeClient();
  
    Page.ClientScript.RegisterStartupScript(
      this.GetType(),
      "js",
      string.Format("alert('計數器:{0}')", proxy.Counter()),
      true);
  
    proxy.Close();
  }
  
  protected void btnPerSessionMode_Click(object sender, EventArgs e)
  {
    if (Session["proxy"] == null)
      Session["proxy"] = new InstanceModeSvc.PerSessionMode.PerSessionModeClient();
  
    Page.ClientScript.RegisterStartupScript(
      this.GetType(),
      "js",
      string.Format("alert('計數器:{0}')", (Session["proxy"] as InstanceModeSvc.PerSessionMode.PerSessionModeClient).Counter()),
      true);
  }
  
  protected void btnSingleMode_Click(object sender, EventArgs e)
  {
    var proxy = new InstanceModeSvc.SingleMode.SingleModeClient();
  
    Page.ClientScript.RegisterStartupScript(
      this.GetType(),
      "js",
      string.Format("alert('計數器:{0}')", proxy.Counter()),
      true);
  
    proxy.Close();
  }
}

Web.config

<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <client>
      <!--address - 服務地址-->
      <!--binding - 通信方式-->
      <!--contract - 服務契約-->
      <endpoint address="http://localhost:3502/ServiceHost/InstanceMode/PerCallMode.svc" binding="basicHttpBinding" contract="InstanceModeSvc.PerCallMode.IPerCallMode" />
  
      <!--bindingConfiguration - 指定相關的綁定配置-->
      <endpoint address="http://localhost:3502/ServiceHost/InstanceMode/PerSessionMode.svc" binding="wsHttpBinding" contract="InstanceModeSvc.PerSessionMode.IPerSessionMode" bindingConfiguration="PerSessionModeBindingConfiguration" />
  
      <endpoint address="http://localhost:3502/ServiceHost/InstanceMode/SingleMode.svc" binding="basicHttpBinding" contract="InstanceModeSvc.SingleMode.ISingleMode" />
    </client>
    <bindings>
      <wsHttpBinding>
        <binding name="PerSessionModeBindingConfiguration">
          <!--指示是否在通道終結點之間建立 WS-RM (WS-ReliableMessaging) 可靠會話。默認值為 false。-->
          <reliableSession enabled="true"/>
          <security>
            <!--此屬性控制安全上下文令牌是否通過客戶端與服務之間的 WS-SecureConversation 交換建立。將它設置為 true 要求遠程方支持 WS-SecureConversation。-->
            <message establishSecurityContext="true"/>
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>
  </system.serviceModel>
</configuration>

運行結果:

單擊"btnPerCallMode"按鈕,每次單擊,計數器都返回1

單擊"btnPerSessionMode"按鈕,每次單擊並且會話相同,計數器會累加

單擊"btnSingleMode"按鈕,每次單擊,計數器都累加

OK

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