ASP.NET - 从客户端访问Web页面的两倍 [英] ASP.NET - Accessing web page twice from client

问题描述

如果一个用户尝试的第一页被返回到客户端之前两次访问ASP.NET页面会发生什么？看看下面的code：

What happens if one user tries to access an ASP.NET page twice before the first page is returned to the client? Have a look at the code below:

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Session("ID") = 1
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Response.Redirect("Default3.aspx")
    End Sub End Class

Partial Class Default2
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Session("ID") = 2
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Response.Redirect("Default3.aspx")
    End Sub
End Class

Imports System.Threading
Partial Class Default3
    Inherits System.Web.UI.Page

    Dim intTest As Integer = 0

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        For intTest = 0 To 10
            Response.Write(Session("ID") & " " & intTest & "<br>")
            Thread.Sleep(1000)
        Next
    End Sub
End Class

来自同一客户端（PC）访问default3.axpx同时从Default.aspx的（通过点击按钮），default2.aspx（点击按钮）导致会话变量是在这两个请求相同的（虽然我设置变量1上的第二第一请求和2）。是否有可能复制这种行为，而不线程？我相信我有在不使用线程的asp.net应用程序这个bug。

Accessing default3.axpx from the same client (PC) concurrently from default.aspx (by clicking button) and default2.aspx (by clicking button) causes the session variable to be the same on both requests (though I set the variable to 1 on the first request and 2 on the second). Is it possible to replicate this behaviour without threading? I believe I have this bug in an asp.net application that does not use threading.

推荐答案

您的问题是不是多线程;它是关于SessionState会。

Your question is not about multi-threading; it is about SessionState.

ASP.NET运行时使用 锁，以避免覆盖相同的会话变量 的虽然它可以处理多个请求。

ASP.NET run time uses lock to avoid overriding same session variables although it can handles multiple requests.

这就是为什么你看不到错过匹配的结果。

It's why you are do not see miss-matching results.

也请看 -

ASP.NET应用页面生命周期

ASP.NET应用程序生命周期概述

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