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这篇文章最初是试图找到问题,我认为这是一个 web.config 问题。我还认为这是我的母版页后面的代码中的东西。这里的所有文字都是找出问题的过程的一部分,滚动到底部以获取最新更新。

我的网站允许用户在文本框中输入代码。如果输入了可识别的代码,页面将刷新并向该用户显示欢迎消息,否则将出现错误消息。我将他们手动输入的代码放入会话中,以便可以提取他们的名字。我无法让会话停留在页面之间。我所有的代码都在母版页的 vb 页面上,我不知道我做错了什么。

  • 我被告知要确保EnableSessionState="true",但这在母版页上不起作用。
  • 我被告知要检查 IIS 设置,但我不能,因为我没有权限。
  • 尝试SessionState cookieless="UseUri"并以某种方式创建了一个永无止境的重定向循环。
  • 我已经调试了这些函数,它们确实返回值。
  • 当我输入代码时,文本框会消失,欢迎消息会显示用户的名字和姓氏,所以我知道这是有效的。
  • 我已经检查以确保Session.Abandon站点中的任何地方都没有代码。
  • 我在页面上的Watch每个实例中添加了一个,Session("IB")当我在文本框中输入代码时,它们被正确填充。然后当我点击一个链接移动到另一个页面时,调试器在我的第一行停止,我Page_Load所有Dim ib As String = CType(Session.Item("IB"), String)观察到的 IB 变量立即变成Nothing.

这是母版页背后的代码:

Imports System.Data
Imports System.Data.SqlClient
Imports System.Data.OleDb
Partial Class MasterPage
  Inherits System.Web.UI.MasterPage
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
      Dim BAccount As String = CType(Session("BAccount"), String)
       If Not IsPostBack Then
        If Session("BAccount") Is Nothing Then
            'no such value in session state, show textbox for IB to enter code
            IBText.Visible = True
            IBTextBox.Visible = True
            IBTextBoxButton.Visible = True
            lbNotIB.Visible = False
        Else
            'call function
            GetSessionValues(BAccount)
        End If
    End If
End Sub
Protected Function GetSessionValues(ByVal Code As String) As Boolean
    Dim FirstName As String = CType(Session("First_Name"), String)
    Dim LastName As String = CType(Session("Last_Name"), String)
    Dim Name As String = CType(Session("Name"), String)
    If GetAccountName(FirstName, LastName) Then
        'hide textbox
        IBText.Visible = False
        IBTextBox.Visible = False
        IBTextBoxButton.Visible = False
        'show welcome message to user if IB code exists in database
        lblIB.Visible = True
        lblIB.Text = "Welcome, " + Session("First_Name") + " " + Session("Last_Name") + "."
        lbNotIB.Visible = True
        lbNotIB.Text = "Not " + Session("First_Name") + " " + Session("Last_Name") + "?"
        Return True
    ElseIf GetBackUpAccountName(Name) Then
        'hide textbox
        IBText.Visible = False
        IBTextBox.Visible = False
        IBTextBoxButton.Visible = False
        'show welcome message to user if IB code exists in database
        lblIB.Visible = True
        lblIB.Text = "Welcome, " + Session("Name") + "."
        lbNotIB.Visible = True
        lbNotIB.Text = "Not " + Session("Name") + "?"
        Return True
    Else
        'IB code not found
        'shows error message in red
        lblIB.ForeColor = Drawing.Color.Red
        lblIB.Text = "Account not found, please try again."
        Return False
    End If
End Function
Private Function GetAccountName(ByRef FirstName As String, ByRef LastName As String) As Boolean
    'declare variable
    Dim BAccount As String = CType(Session("BAccount"), String)
    'sql statement for baccount information
    Dim sql As String = "SELECT BAccount, First_Name, Last_Name FROM IB INNER JOIN IB_BUISNESS_INFORMATION ON (IB.IB_ID = IB_BUISNESS_INFORMATION.IB_ID) WHERE BAccount = @BAccount"
    Using conn As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("IBConnectionString").ConnectionString)
        Using cmd As New SqlCommand(sql, conn)
            cmd.Parameters.AddWithValue("@BAccount", SqlDbType.VarChar)
            cmd.Parameters("@BAccount").Value = IBTextBox.Text
            If IBTextBox.Text Is Nothing Then
                cmd.Parameters("@BAccount").Value = DBNull.Value
            Else
                cmd.Parameters("@BAccount").Value = IBTextBox.Text
            End If
            conn.Open()
            Using rdr As SqlDataReader = cmd.ExecuteReader
                If (rdr.Read) Then
                    FirstName = rdr("First_Name").ToString()
                    LastName = rdr("Last_Name").ToString()
                    Return True
                Else
                    Return False
                End If
            End Using
            conn.Close()
        End Using
    End Using
End Function
Private Function GetBackUpAccountName(ByRef Name As String) As Boolean
    'declare variable
    Dim BAccount As String = CType(Session("BAccount"), String)
    'sql statement for baccount information in case BAccount is not found, search here next
    Dim backupsql As String = "SELECT BAccount, Name FROM brokermaster WHERE BAccount = ?"
    Using conn As New OleDbConnection(System.Configuration.ConfigurationManager.ConnectionStrings("BackUpConnectionString").ConnectionString)
        Using cmd As New OleDbCommand(backupsql, conn)
            cmd.Parameters.AddWithValue("?", SqlDbType.VarChar)
            cmd.Parameters("?").Value = IBTextBox.Text
            If IBTextBox.Text Is Nothing Then
                cmd.Parameters("?").Value = DBNull.Value
            Else
                cmd.Parameters("?").Value = IBTextBox.Text
            End If
            conn.Open()
            Using backuprdr As OleDbDataReader = cmd.ExecuteReader
                If (backuprdr.Read) Then
                    Name = backuprdr("Name").ToString()
                    Return True
                Else
                    Return False
                End If
            End Using
            conn.Close()
        End Using
    End Using
End Function
Protected Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
    'declare variables
    Dim FirstName As String = CType(Session("First_Name"), String)
    Dim LastName As String = CType(Session("Last_Name"), String)
    Dim Name As String = CType(Session("Name"), String)
    If (Not GetSessionValues(args.Value)) Then
        args.IsValid = False
    Else
        args.IsValid = True
    End If
    If GetAccountName(FirstName, LastName) Then
        'set session variables
        Session("First_Name") = FirstName
        Session("Last_Name") = LastName
        'hide textbox
        IBText.Visible = False
        IBTextBox.Visible = False
        IBTextBoxButton.Visible = False
        args.IsValid = True
        'show welcome message to user if IB code exists in database
        lblIB.Visible = True
        lblIB.Text = "Welcome, " + Session("First_Name") + " " + Session("Last_Name") + "."
    ElseIf GetBackUpAccountName(Name) Then
        'set session variables
        Session("Name") = Name
        'hide textbox
        IBText.Visible = False
        IBTextBox.Visible = False
        IBTextBoxButton.Visible = False
        args.IsValid = True
        'show welcome message to user if IB code exists in database
        lblIB.Visible = True
        lblIB.Text = "Welcome, " + Session("Name") + "."
    Else
        'IB code not found
        args.IsValid = False
        'shows error message in red
        lblIB.ForeColor = Drawing.Color.Red
        lblIB.Text = "Account not found, please try again."
    End If
End Sub
Protected Sub IBTextBoxButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles IBTextBoxButton.Click
    If Page.IsValid Then
        'declare variables
        Dim LSD As String = CType(Session("LSD"), String)
        Dim LSC As String = CType(Session("LSC"), String)
        Dim BAccount As String = CType(Session("BAccount"), String)
        Session("BAccount") = IBTextBox.Text
        'add session variable
        If GetCompanyName(LSD) Then
            Session("LSD") = LSD
        End If
        'add session variable
        If GetWebsite(LSC) Then
            Session("LSC") = LSC
        End If
    End If
End Sub
Private Function GetCompanyName(ByRef LSD As String) As Boolean
    'declare variable
    Dim BAccount As String = CType(Session("BAccount"), String)
    'sql statement to get company information
    Dim sql As String = "SELECT Company_Name, BAccount FROM IB_CONTACT_INFORMATION INNER JOIN IB_BUISNESS_INFORMATION ON (IB_CONTACT_INFORMATION.IB_ID = IB_BUISNESS_INFORMATION.IB_ID) WHERE BAccount = @BAccount"
    Using conn As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("IBConnectionString").ConnectionString)
        Using cmd As New SqlCommand(sql, conn)
            cmd.Parameters.AddWithValue("@BAccount", SqlDbType.VarChar)
            cmd.Parameters("@BAccount").Value = IBTextBox.Text
            If IBTextBox.Text Is Nothing Then
                cmd.Parameters("@BAccount").Value = DBNull.Value
            Else
                cmd.Parameters("@BAccount").Value = IBTextBox.Text
            End If
            conn.Open()
            Using rdr As SqlDataReader = cmd.ExecuteReader
                If (rdr.Read) Then
                    LSD = rdr("Company_Name").ToString()
                    Return True
                Else
                    Return False
                End If
            End Using
            conn.Close()
        End Using
    End Using
End Function
Private Function GetWebsite(ByRef LSC As String) As Boolean
    'declare variable
    Dim BAccount As String = CType(Session("BAccount"), String)
    'sql statement for website information
    Dim sql As String = "SELECT TOP 1 WebSites, BAccount FROM IB_WEBSITES INNER JOIN IB_BUISNESS_INFORMATION ON (IB_WEBSITES.IB_ID = IB_BUISNESS_INFORMATION.IB_ID) WHERE BAccount = @BAccount"
    Using conn As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("IBConnectionString").ConnectionString)
        Using cmd As New SqlCommand(sql, conn)
            cmd.Parameters.AddWithValue("@BAccount", SqlDbType.VarChar)
            cmd.Parameters("@BAccount").Value = IBTextBox.Text
            If IBTextBox.Text Is Nothing Then
                cmd.Parameters("@BAccount").Value = DBNull.Value
            Else
                cmd.Parameters("@BAccount").Value = IBTextBox.Text
            End If
            conn.Open()
            Using rdr As SqlDataReader = cmd.ExecuteReader
                If (rdr.Read) Then
                    LSC = rdr("WebSites").ToString()
                    Return True
                Else
                    Return False
                End If
            End Using
            conn.Close()
        End Using
    End Using
End Function
Protected Sub lbNotIB_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lbNotIB.Click
    'if user is not IB that currently holds session, this will destroy the session and allow them to enter different code
    Session.Abandon()
    Response.Redirect(Request.RawUrl)
End Sub

结束类

aspx:

<asp:Label ID="IBText" runat="server" Text="Enter your IB code here:"></asp:Label>
  <asp:TextBox ID="IBTextBox" runat="server"></asp:TextBox>
  <asp:Button ID="IBTextBoxButton" runat="server" Text="Submit" />
  <asp:CustomValidator ID="CustomValidator1" runat="server"
  ControlToValidate="IBTextBox" ForeColor="Red"
  OnServerValidate="CustomValidator1_ServerValidate"></asp:CustomValidator>
<asp:Label ID="lblIB" runat="server" Text=""></asp:Label>

网络配置:

<sessionState mode="InProc" cookieless="false" timeout="20" sqlConnectionString="Data Source=***;Initial Catalog=***;Persist Security Info=True;User ID=***;Password=***">
</sessionState>

更新: 哈!我终于明白了!所以这里有两个问题。我没有<httpModules>设置在我的web.config. 我需要补充:

<httpModules>
   <add name="Session" type="System.Web.SessionState.SessionStateModule"/>
</httpModules>

参考

现在的问题是我从 2 个数据库中提取了这些信息,但在我的文件部分中Sessions只列出了 1 个数据库。我尝试添加第二个,但它引发了错误。<sessionState>web.config<sessionState>

有没有办法包含第二个数据库?如果我不这样做,我的一半会话将留在整个网站,一半将消失。顺便说一句,我与创建数据库没有任何关系,这一切都是在我之前完成的。

我在 web.config 中试过这个,但它也不起作用:

<sessionState mode="InProc" 
              cookieless="false" 
              timeout="20" 
              sqlConnectionString="IBConnectionString, BackUpConnectionString">
</sessionState>

另一个更新: 这是我尝试过的另一件事,由 asp.net 论坛上的用户建议。这也产生了 500 内部服务器错误,所以这让我认为拥有 2 个实例<sessionState>是不允许的。

<sessionState mode="SQLServer"
              cookieless="false"
              timeout="20"
              sqlConnectionString="IBConnectionString">
</sessionState>
<sessionState mode="SQLServer"
              cookieless="false"
              timeout="20"
              sqlConnectionString="BackUpConnectionString">
</sessionState>

更多: sessionState已更改并且站点仍然像以前一样运行,这ConnectionString与第二个数据库丢失会话的问题一定没有任何关系。肯定是后面的代码有问题,我想不出web.config还有什么问题。

<sessionState mode="InProc" timeout="20"></sessionState>

我们还发现会话变量仍然存在,只是在连接到备份数据库连接时不会显示用户信息。


经过深思熟虑和挫折,我问我的老板,仅仅合并数据库会有多难。虽然备份帐户数据库中有超过 2400 条记录,但确实没有其他选择。我预计不会很快找到解决方案,而且我已经为此浪费了一个月的时间......感谢大家的帮助。

如果我真的弄明白了,我会回来编辑这篇文章!

4

3 回答 3

2

首先,在页面的 Init 部分中删除您的代码。这是不必要的。

其次,为什么在部分代码中将会话的 IB 值设置为 True?它正在覆盖帐号。两个都改。。

Session("IB") = True

Session("IB") = args.Value

或者只是在这一点上什至不要弄乱会话..它应该已经从 IBTextBoxButton_Click 子例程中设置。

于 2012-03-26T19:57:10.963 回答
1

此外,我看到过去抛出的异常似乎“吃掉”了会话。寻找任何可能给您带来问题的 try/catch 块。

单步执行代码通常会显示问题,但如果没有,我使用的一种有时会有所帮助的技术是在代码中乱扔“我在这里”消息。

想法是,有时当您可以看到哪条线(或靠近它的线)似乎正在造成问题时,它有助于触发顿悟。

例如,您可以转储会话变量状态以及大致的行号,然后将其在多个位置输出到您的网页。

您还应该尝试缩小正在调试的代码量。

如果您可以将问题隔离到一组较小的代码中,这通常有助于发现问题。

** 编辑 ** 显然我只是在扫描。在实际阅读您的帖子后,我看到您已经确定了导致问​​题的行。我看不出这条线有什么问题,但出于某种原因,我想尝试使用不同的会话变量名。我不知道这是否会有所帮助,但这是一件容易尝试的事情。也许使用更长的会话变量名。如果没有在我面前打开调试器,我不知道还有什么要检查的。

于 2012-03-28T17:51:08.447 回答
1

确保在 web.config 中启用会话状态。如果它设置为“StateServer”或“SQLServer”,请将其更改为“InProc”以进行测试以排除外部失败的依赖项。

<sessionState mode="InProc" />
于 2012-03-26T20:01:20.783 回答