当前位置: 首页 > 图文教程 > 网络编程 > ASP.NET > ASP.NET创建XML Web服务全接触(12)

ASP.NET
谈谈ASP.net2.0中App_GlobalResources的用途
.Net Framework 4.0 功能介绍
ASP.NET教程:浅谈Asp.net实现的邮件发送引擎
ASP.NET教程:绝对路径与相对路径的拼合方法
ASP.NET开发电子商务网站学习经验
ASP.NET与PHP构建web程序的方法的优缺点
ASp.NET教程:页面传值的五种方法
ASP.NET教程:数据缓存和输出缓存
ASP.NET比拼PHP的测试环境
ASP.NET MVC 2的客户端验证扩展
ASP.NET实例:无刷新的文件上传
ASP.NET实例: GridView删除时弹出确认对话框
ASP.NET获取不到js写的cookie解决方法
ASP.NET MVC教程:数据库表的增删改
ASP.NET教程:form验证用户登录的Cookie
如何让.NET程序脱离.NET框架
ASP.NET开发网站程序常见错误汇总
C#教程:匿名类型和隐式类型变量的区别
C#3.0教程:自动属性和扩展方法
使用XmlDocument读取XML节点所有数据

ASP.NET创建XML Web服务全接触(12)


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-11-03   浏览: 64 ::
收藏到网摘: n/a

管理Web服务状态(2)

    

  在下面示例中,appMyServiceUsage状态变量被访问来递增其值。下面的代码示例是一个使用两个XML Web服务方法的XML Web服务:ServerUsage和PerSessionServerUage。ServerUsage是一个点击计数器,用于访问ServerUsage XML Web服务方法时计数,而不管客户端如何与XML Web服务方法通信。例如,如果三个客户端连续地调用ServerUsage XML Web服务方法,最后一个接收一个返回值3。而PerSessionServiceUsage则是用于一个特别的客户端会话的计数器。如果三个客户端连续地访问PerSessionServiceUsage,每个客户端都会在第一次调用的时候接收到相同的结果。

[C#]
<%@ WebService Language="C#" Class="ServerUsage" %>
using System.Web.Services;

public class ServerUsage : WebService {
 [ WebMethod(Description="Number of times this service has been accessed.") ]
 public int ServiceUsage() {
  // If the XML Web service method hasn't been accessed,
  // initialize it to 1.
  if (Application["appMyServiceUsage"] == null)
  {
   Application["appMyServiceUsage"] = 1;
  }
  else
  {
   // Increment the usage count.
   Application["appMyServiceUsage"] = ((int) Application["appMyServiceUsage"]) + 1;
  }
  return (int) Application["appMyServiceUsage"];
 }

 [ WebMethod(Description="Number of times a particualr client session has accessed this XML Web service method.",EnableSession=true) ]
 public int PerSessionServiceUsage() {
  // If the XML Web service method hasn't been accessed, initialize
  // it to 1.
  if (Session["MyServiceUsage"] == null)
  {
   Session["MyServiceUsage"] = 1;
  }
  else
  {
   // Increment the usage count.
   Session["MyServiceUsage"] = ((int) Session["MyServiceUsage"]) + 1;
  }
  return (int) Session["MyServiceUsage"];
 }
}

[Visual Basic]
<%@ WebService Language="VB" Class="ServerUsage" %>
Imports System.Web.Services

Public Class ServerUsage
Inherits WebService

<WebMethod(Description := "Number of times this service has been accessed.")> _
Public Function ServiceUsage() As Integer
' If the XML Web service method hasn't been accessed, initialize
' it to 1.
If Application("appMyServiceUsage") Is Nothing Then
 Application("appMyServiceUsage") = 1
Else
 ' Increment the usage count.
 Application("appMyServiceUsage") = _
 CInt(Application("appMyServiceUsage")) + 1
End If
Return CInt(Application("appMyServiceUsage"))
End Function

<WebMethod(Description := "Number of times a particular client session has accessed this XML Web service method.", EnableSession := True)> _
Public Function PerSessionServiceUsage() As Integer
' If the XML Web service method hasn't been accessed,
' initialize it to 1.
If Session("MyServiceUsage") Is Nothing Then
 Session("MyServiceUsage") = 1
Else
 ' Increment the usage count.
 Session("MyServiceUsage") = CInt(Session("MyServiceUsage")) + 1
End If
 Return CInt(Session("MyServiceUsage"))
End Function

End Class