>I have a class which starts like this:
>
>

>Imports System.Data.OleDb
>
>Public Class Data
>
>    Public oDataAdapter As OleDbDataAdapter
>    Public oDataSet As DataSet
>    Public oDataView As DataView
>    Public cSQL As String
>    Public cConnectionString As String
>    Public nCount As Integer
>    Public oParameters As OleDbParameterCollection

>
>
>To instantiate it, I do something like this:
>
>

>        Dim loDataProvider As Framework.Data = New Framework.Data

>
>
>Now, I need to add some parameters in the collection before doing something else. So, the instantiation code section now contains this:
>
>

>        Dim loDataProvider As Framework.Data = New Framework.Data
>        loDataProvider.oParameters.Add(New OleDbParameter("@Username", lcUsername))

>
>
>This doesn't give any error at design time. But, when I run it, I obtain:
>
>Object reference not set to an instance of an object
>
>Anyone would know what I have to adjust?

Public oParameters As OleDbParameterCollection
...
oParameters = oDataAdapter.SelectCommand.Parameters

oParameters doesn't sound to be a good naming really.

loDataProvider.oDataAdapter.SelectCommand.Parameters.Add( ... )
loDataProvider.oDataAdapter.UpdateCommand.Parameters.Add( ... )
loDataProvider.oDataAdapter.InsertCommand.Parameters.Add( ... )

PS: Might not be right. Thinking C# wrting VB:)
Cetin
Çetin Basöz