Index was outside the bounds of the array

snufse · February 12th, 2009, 05:32 PM

When running an application a web page I get following error:

Index was outside the bounds of the array.
[IndexOutOfRangeException: Index was outside the bounds of the array.]
Default_aspx.Page_Load(Object sender, EventArgs e) +422

Code:

 
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Page.IsPostBack = False Then
ViewState("InitialSort1") = Boolean.TrueString = True
button2.Visible = False
Calendar1.Visible = False
TextBox1.Text = Session("Saved_JobNumber")
TextBox2.Text = Session("Saved_Text")
Else
ViewState("@User_Id") = UCase(Request.ServerVariables("LOGON_USER")).Split("\")(1)
End If
End Sub

Now, this works on my local machine, but not when published to the web server. If I remove/comment out following line:

ViewState("@User_Id") = UCase(Request.ServerVariables("LOGON_USER")).Split ("\")(1)

it works fine.

Old Pedant · February 12th, 2009, 05:58 PM

You need to DEBUG. Find out WHICH array it is complaining about.

I *SUSPECT* that in the line

Code:

ViewState("@User_Id") = UCase(Request.ServerVariables("LOGON_USER")).Split  ("\")(1)

it is complaining about the array created by the SPLIT. It is basically saying there isn't any "\" character in the LOGON_USER server varaible and so the array created by SPLIT has only one element (element ZERO) and so of course trying to use (1) is outside the bounds.

You could easily find this out by breaking that line into multiple pieces and then using the DEBUGGER (yes, it works well) to step through each piece and check what is going on.

Example:

Code:

Dim logonuser = UCase(Request.ServerVariables("LOGON_USER"))
' put a breakpoint here.  Look at value of logonuser.  Does it have a \ in it???
Dim chunks As String() = logonuser.Split("\")
Dim chunkcount As Integer = UBound(chunks)
If chunkcount > 0 Then
    ViewState("@User_Id") = chunks(1)
Else
    ... what do you do when no \ in LOGON_USER ???
End If

snufse · February 13th, 2009, 10:35 AM

Hi Old Pedant,

Thank you for a very good explanation.

The reason it did not work (doing the split) was that for this site, the authenitication method was set to Enable Anonymouss Access = True (the other sites that are working it is set to false). I did the debug and found the problem.

Again I very much appreciate your help......