[02/03] Problem selecting first row in DataGrid

Good morning, all! Here's my problem: I have a normal datagrid that when a user selects a row, it will open up another form w/ details about the selected row. It all works fine except when I click on the very top of the datagrid (where the column names are displayed) - it gives me an error on my next form because current row index = 0. I can add an if to catch this, but then if the first data row is selected, it will not actually select the row. What am I doing wrong?

I would like for the users to click at the top of the datagrid to sort the data and also be able to select the first row in the datagrid. I can't seem to get both functions working properly.

Here's my code:

VB Code:

Private Sub productlist_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) 
Handles productlist.MouseUp
If numclicks > 498 Then
            MessageBox.Show("You have selected too many items.")
        Else
            Try
 
                Dim pt = New Point(e.X, e.Y)
 
                Dim hti As DataGrid.HitTestInfo = productlist.HitTest(pt)
 
                If hti.Type = DataGrid.HitTestType.Cell Then
 
                    productlist.CurrentCell = New DataGridCell(hti.Row, hti.Column)
 
                    productlist.Select(hti.Row)
 
                    ProdID = Me.productlist.Item(Me.productlist.CurrentRowIndex, 0).ToString
                    
                End If
 
            Catch ex As Exception
                MessageBox.Show(ex.ToString)
 
            End Try
        End If
 
        'If productlist.CurrentRowIndex = 0 Then '= "" Then ' Then
        'productlist.CurrentRowIndex = 1
        'ProdID = ""
        'MessageBox.Show("Please select an item inside the grid.")
        'Else
            Dim myform As New productdetailform
            myform.Show()
        'End If
 
 
    End Sub

I can uncomment different parts of the if statement to get different behaviors in the datagrid, but I can not get it to where I can sort by clicking at the top AND select the first row of data.

Thanks for any and all help you folks can provide!

Anyone got any ideas what I might be doing wrong? I would appreciate any and all advise.

Thanks!

Thought I'd bump this up one more time to see if anyone could help me. I've messed around with this for hours and can't get it right. Is there something obvious I'm missing? I've searched the forums and haven't found anything about this particular problem.

I would really appreciate some help or advise on this issue. Anyone???

Thanks!