troubleshooting Question

Issue when creating reusable code. Stated works fine. When a variable produces: Object Ref not set to an instance of an object

Avatar of Romolo
RomoloFlag for United Kingdom of Great Britain and Northern Ireland asked on
Visual Basic.NETVB ScriptPowershellStatistical PackagesR
13 Comments1 Solution152 ViewsLast Modified:
VB application that sends PowerShell commands and receives the output.

I am putting the output in to a List view.

The following works fine:

 
[code]      For Each ID In PSOut

            i = i + 1

            'Dim str(6) As String
            Dim str(ColumnCount) As String
            Dim ItCount As Integer = 0
            Dim itm As ListViewItem

            '     Do While ItCount < ColumnCount
            For Each strHeadDSingle In strHeadD2
                str(ItCount) = ID.Properties("name").Value.ToString() ' ### WORKS FINE
                ItCount = ItCount + 1
            Next
            '    Loop
            '         Name, SamAccountName, EmailAddress, PrimarySMTPAddress, UserPrincipalName, DistinguishedName, Enabled"

            itm = New ListViewItem(str)
            ListView1.Items.Insert(0, itm)
        Next
[/code]


When passed as a variable I get the following:

  For Each ID In PSOut

            i = i + 1

            'Dim str(6) As String
            Dim str(ColumnCount) As String
            Dim ItCount As Integer = 0
            Dim itm As ListViewItem

            '     Do While ItCount < ColumnCount
            For Each strHeadDSingle In strHeadD2
                str(ItCount) = ID.Properties(strHeadDSingle).Value.ToString()          ' ### ERRORS THIS LINE
                ItCount = ItCount + 1
            Next
            '    Loop
            '         Name, SamAccountName, EmailAddress, PrimarySMTPAddress, UserPrincipalName, DistinguishedName, Enabled"

            itm = New ListViewItem(str)
            ListView1.Items.Insert(0, itm)
        Next
     


it works 100% as a stated item.

When I try to make my reusable code I get the following on this line when debugging:

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

I have checked and values are there quite happily... but little confused.,

Please advise

Many thanks in advance

R
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