Re: System.NullReferenceException: Object reference not set to an instance of an object.

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From: PatricQ (patricq1_at_yahoo.com)
Date: 02/18/04 

Date: Wed, 18 Feb 2004 07:11:10 +0100

Thank you,

When I tried it, it said "end of statement expected", it doesnt like
the = Ctype(... part.

Patrick

On Tue, 17 Feb 2004 15:13:55 -0600, "A Lonely Programmer"
<SpamaLinuxUser@NoSpamForMe.com> wrote:

> Dim _framework as new framework =
>CType(HttpContext.Current.Items("framework"), framework)
>
>
>"PatricQ" <patricq1@yahoo.com> wrote in message
>news:lft4309h49pe4tl6plotnfhkdk69vsbskj@4ax.com...
>> I use VS.NET and yes I'm a beginner in ASP.NET.
>>
>> Here is the problem:
>>
>> in "%webroot%\components" is the folowing vb code file:
>>
>> framework.vb
>> ----------------------------------------
>> Imports System
>> Imports System.Configuration
>> Imports System.Web
>> Imports System.Data
>> Imports System.Collections
>>
>> Public Class framework
>> Public framework_name As String = "Hello"
>> Public framework_logo As String = ""
>> End Class
>> ----------------------------------------
>>
>>
>>
>>
>>
>> Then in %webroot%\ is the main (test) page for the site:
>> default.aspx.vb (code behind file):
>> ----------------------------------------
>> Imports System.Web
>> Imports AIS3
>>
>>
>> Public Class _default
>> Inherits System.Web.UI.Page
>> Protected label1 As System.Web.UI.WebControls.Label
>> Protected maintitle As System.Web.UI.HtmlControls.HtmlGenericControl
>>
>>
>> Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
>> System.EventArgs) Handles MyBase.Init
>>
>> Dim _framework As framework =
>> CType(HttpContext.Current.Items("framework"), framework)
>>
>> label1.Text = _framework.framework_name
>>
>> maintitle.InnerText = "New title for page"
>>
>> End Sub
>> End Class
>> ----------------------------------------
>>
>>
>> There is no code in default.aspx and VS.NET creates the namespace
>> "AIS3" automatically. I imported it in default.aspx.vb file but im not
>> sure that was really needed.
>>
>> But... when i run the thing i get:
>>
>> ---------------------------------------
>> Description: An unhandled exception occurred during the execution of
>> the current web request. Please review the stack trace for more
>> information about the error and where it originated in the code.
>>
>> Exception Details: System.NullReferenceException: Object reference not
>> set to an instance of an object.
>>
>> Source Error:
>>
>>
>> Line 26: Dim _framework As framework =
>> CType(HttpContext.Current.Items("framework"), framework)
>> Line 27:
>> Line 28: label1.Text = _framework.framework_name
>> Line 29:
>> Line 30: maintitle.InnerText = "New title for page"
>>
>>
>> Source File: c:\inetpub\wwwroot\AIS3\default.aspx.vb Line: 28
>>
>> Stack Trace:
>>
>>
>> [NullReferenceException: Object reference not set to an instance of an
>> object.]
>> AIS3._default.Page_Init(Object sender, EventArgs e) in
>> c:\inetpub\wwwroot\AIS3\default.aspx.vb:28
>> System.Web.UI.Control.OnInit(EventArgs e) +67
>> System.Web.UI.Control.InitRecursive(Control namingContainer) +241
>> System.Web.UI.Page.ProcessRequestMain() +174
>> ------------------------------------------
>>
>>
>>
>> Line 28 is marked
>>
>>
>> What am i doing wrong?
>>
>> Thanku :)
>>
>> Patrick
>

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