DataView filtering

private void MakeDataView()
{
  DataView dv = new DataView();

  dv.Table = DataSet1.Tables["Suppliers"];
  dv.AllowDelete = true;
  dv.AllowEdit = true;
  dv.AllowNew = true;
  dv.RowFilter = "City = 'Berlin'";
  dv.RowStateFilter = DataViewRowState.ModifiedCurrent;
  dv.Sort = "CompanyName DESC";
 
  // Simple bind to a TextBox control
  Text1.DataBindings.Add("Text", dv, "CompanyName");
}