Re: object refrence not set to an instance of an object ??
- From: jeroen <jeroen@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 1 Jun 2005 05:30:15 -0700
thanks, i rewrote it a little. and it works now :)
"_AnonCoward" wrote:
> "jeroen" <jeroen@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:C35A2670-C94F-4582-A202-AF6303429D9D@xxxxxxxxxxxxxxxx
> :
> : hello,
> :
> : i'm having a problem with the following piece of code. i use it to
> : read a string in an array, then search that string for ";;" symbols,
> : then i read what comes after that to a variable, witch goes to a text
> : box. but every time i run the subroutine, i get an "Object reference
> : not set to an instance of an object." error at the time it reaches
> : "start = line.IndexOf(";;")"
> :
> : also, wenn i set a breakpoint to debug it, de breakpoint red point's
> : get a question mark in it(meaning the code isn't avalible?). what's
> : that all about ?
> :
> : Code:
> : Dim line, start2 As String
> : Dim start As Integer
> : Dim counter As Integer = 0
> :
> : If comments.Count = 0 Then
> : Exit Function
> : End If
> :
> : While counter < countedcomments
> : counter += 1
> : line = comments(counter)
> : If line.StartsWith(fotos(positionarray)) Then
> : Exit While
> : End If
> : End While
> :
> : start = line.IndexOf(";;")
> :
> : If Not start = -1 Then
> : txtbijschrift.Text = ""
> : Exit Function
> : End If
> : start2 = Mid(line, start)
> : txtbijschrift.Text = start2
> :
> : thanks for the help :)
> : jeroen
>
>
> This error is indicating that the 'line' object is a null reference
> (Nothing). You did not instantiate your line object when you declared it
> and, evidently, it is not being assigned inside your while loop. My
> guess is this is because 'counter' starts out as greater than
> 'countedcomments'. In that case, the statement 'line = comments(counter)
> is never beening reached. If so, then when you attempt to access the
> indexOf function of the string class, the code objects because 'line' is
> uninstantiated (it remains a null value).
>
>
> Try instantiating the 'line' variable when you declare it (Dim line As
> String = "") or check to ensure the variable is referencing a live
> object prior to the state where your error is occuring. For example:
>
>
> If line Is Nothing Then
> 'add whatever logic you feel
> 'is appropriate here
>
> Else
> start = line.IndexOf(";;")
>
> If Not start = -1 Then
> txtbijschrift.Text = ""
> Exit Function
> End If
> start2 = Mid(line, start)
> txtbijschrift.Text = start2
>
> End If
>
> HTH
>
> Ralf
>
>
>
.
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- object refrence not set to an instance of an object ??
- From: jeroen
- Re: object refrence not set to an instance of an object ??
- From: _AnonCoward
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