Question

I’ve done development in both VB6 and VB.NET, and I’ve used ADODB objects in VB6 to handle recordset navigation (i.e. the MoveFirst, MoveNext, etc. methods), and I have used ADO.NET to handle queries in a row-by-row nature (i.e For Each Row In Table.Rows …)

But now I seem to have come to a dilemma. I am now building a program in VB.NET where I need to use the equivalent functionality of the Move commands of the old Recordset object. Does VB.NET have some sort of object that supports this functionality, or do I have to resort to using the old ADODB COM object?

Edit: Just for clarification, I want the user to be able to navigate through the query moving forwards or backwards. Looping through the rows is a simple task.

Answer 1

There is no need to go back to the bad old days. If you can give a pseudo code example, I can translate to vb.net for you.

This is kind of a generic way to do it.

Dim ds as DataSet  'populate your DataSet'  For each dr as DataRow in ds.Tables(<tableIndex>).Rows   'Do something with the row'  Next 

Per Edit 1: The user will navigate the results, not the query. So what you want to do is either a) get the results and display only the current rowindex of ds.Tables.Row() to them, or b) execute a new query with each navigation (not a real well performing option.)

Per comment: No, they havent. But the user usually will not be working interactively with the database like this. You will need to get your dataset / table of the results, and use the buttons to retrieve the relevant row from the dataset/table.

• The First Row is DataTable.Rows(0)
• The Last Row is DataTable.Rows(DataTable.Rows.Count-1)
• • for any row in between (store the currently displayed rowindex in your app), then call
• DataTable.Rows(currentRowIndex -1) for previous and
• DataTable.Rows(currentRowIndex +1) for next.