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ASP.NET創(chuàng)建XML Web服務(wù)全接觸(12)

發(fā)表時間：2024-02-07 來源：明輝站整理相關(guān)軟件相關(guān)文章人氣：

[摘要]在下面示例中，appMyServiceUsage狀態(tài)變量被訪問來遞增其值。下面的代碼示例是一個使用兩個XML Web服務(wù)方法的XML Web服務(wù)：ServerUsage和PerSessionServerUage。ServerUsage是一個點擊計數(shù)器，用于訪問ServerUsage XML Web...

    

　　在下面示例中，appMyServiceUsage狀態(tài)變量被訪問來遞增其值。下面的代碼示例是一個使用兩個XML Web服務(wù)方法的XML Web服務(wù)：ServerUsage和PerSessionServerUage。ServerUsage是一個點擊計數(shù)器，用于訪問ServerUsage XML Web服務(wù)方法時計數(shù)，而不管客戶端如何與XML Web服務(wù)方法通信。例如，如果三個客戶端連續(xù)地調(diào)用ServerUsage XML Web服務(wù)方法，最后一個接收一個返回值3。而PerSessionServiceUsage則是用于一個特別的客戶端會話的計數(shù)器。如果三個客戶端連續(xù)地訪問PerSessionServiceUsage，每個客戶端都會在第一次調(diào)用的時候接收到相同的結(jié)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