Update MS Access via vb.net - vb.net

Question

the below code runs without error, but the MS Access table isn't updating. What am I missing?
Try
cnn = New OleDbConnection(ConfigurationManager.ConnectionStrings("accConnectionString").ToString())
cnn.Open()
Catch ex As Exception
Debug.Print("Oops - no connection to database")
Exit Sub
End Try
Dim sql As String
sql = "SELECT * FROM tblSend WHERE UploadedSuccessfullyOn is null ORDER BY QueuedOn;"
Dim da As New OleDbDataAdapter(sql, cnn)
Dim ds As New DataSet
da.Fill(ds, "dsQueuedToSend")
For Each dr As DataRow In ds.Tables("dsQueuedToSend").Rows
' Perform other unrelated tasks in this space, removed for brevity
' If those other tasks were successful, update Access.
If success = True Then
sql = "UPDATE [tblSend] SET [UploadedSuccessfullyOn] = #uploadedOn WHERE (([UploadID]) = #uploadId);"
Dim cmd As OleDbCommand
cmd = New OleDbCommand(sql, cnn)
cmd.Parameters.Add("#uploadedOn", OleDbType.Date).Value = Now
cmd.Parameters.Add("#uploadedId", OleDbType.Integer).Value = dr("UploadID")
cmd.ExecuteNonQuery()
cmd.Dispose()
Console.WriteLine("Success: updated.")
Else
Console.WriteLine("Failed: Not updated.")
End If
Next
da.Dispose()
cnn.Close()
I've also tried with:
sql = "UPDATE [tblSend] SET [UploadedSuccessfullyOn] = ? WHERE (([UploadID]) = ?);"
Or simply add the values in the not-preferred/non-parameter approach:
sql = "UPDATE [tblSend] SET [UploadedSuccessfullyOn] = #" & Now & "# WHERE (([UploadID]) = " & dr("UploadID") & ");"
Dim cmd As OleDbCommand
cmd = New OleDbCommand(sql, cnn)
cmd.ExecuteNonQuery()
cmd.Dispose()
None of these approaches updates the MS Access table. Ideas? Thanks!

Answer 1

One thing I have been caught by before with Visual Studio is that when embedding an Access database in a WinForms project, when you run the project, the Access database is copied over from the original to the runtime directory, overwriting any changes you've made.
This can create the illusion that an update is not taking place, when in fact if you check at the right moment, it is.