Question

I have a production system which has a button to go a quoting system on a different site. The button calls

Response.Redirect("https://www.???????.com/program/EditQuote.aspx?QuoteNumber=" & Trim(txtQuoteNum.Text), False)

It works perfectly the first time, but after that (if I close the tab that opened) the target page comes up with almost all the data missing from the page which should have been loaded in the page_load event of that page. Here is the code in the page_load event

If Not IsPostBack Then
   If Request.QueryString("QuoteNumber") IsNot Nothing AndAlso IsNumeric(Request.QueryString("QuoteNumber")) Then
      Session("LoadQuoteNumber") = Request.QueryString("QuoteNumber")
   End If
End If

The only way it works again is if I close the browser and start again. It works on my dev machine on localhost so I don’t know how to try to follow what’s going on to debug this type of problem which only happens in the production environment.

Answer 1

The problem was the following code which was in the code behind:

Private _refreshState As Boolean
Private _isRefresh As Boolean

Protected Overrides Sub LoadViewState(ByVal savedState As Object)
    Dim AllStates As Object() = savedState
    MyBase.LoadViewState(AllStates(0))
    _refreshState = Boolean.Parse(AllStates(1))
    _isRefresh = _refreshState = Session("__ISREFRESH")
End Sub

Protected Overrides Function SaveViewState() As Object
    Session("__ISREFRESH") = _refreshState
    Dim AllStates() As Object = New Object(2) {}
    AllStates(0) = MyBase.SaveViewState
    AllStates(1) = Not (_refreshState)
    Return AllStates
End Function

It was put in to solve a problem we had when the user refreshed the page. Here’s the article which gave is the code: http://www.codeproject.com/Articles/10240/Detecting-Page-Refresh