title: Add a new row to an existing dynamic datatable
body: <p>I have a dynamic datatable, created from a database. I want to add a new row (blank), so there is an option to choose nothing in a combobx. Everything works ok without adding the new row. But when I add a new row, the combobox displays nothing. What am I missing?</p>
  
  <p>Here is the code</p>
  
  <pre><code>Dim DT As New DataTable
  
  DT = DS.Tables("CallStatus")
  Dim drNewRow As DataRow = DT.NewRow
  
  'Add new row
  drNewRow.Item("CampaignCallStatusID") = ""
  drNewRow.Item("CampaignCallStatus") = ""
  DT.Rows.Add(drNewRow)
  DT.AcceptChanges()
  
  'Fill combobox
  With cboCallStatus
      .DataSource = DT
      .DisplayMember = "CampaignCallStatus"
      .ValueMember = "CampaignCallStatusID"
  End With
  </code></pre>