private string dataTableName = "TextBoxen";
private DataSet ds = new DataSet(); private DataTable dt; 
OleDbDataAdapter dataAdapter = new OleDbDataAdapter();
private TextBoxen autoTbs = new TextBoxen();
private TextBoxen manuTbs = new TextBoxen();

private void Form1_Load(object sender, System.EventArgs e)
{
  InitControls(this); InitDatabase();
  dataGrid1.DataSource = ds.Tables[dataTableName];
  for (int i=0; i<autoTbs.Count; i++)
    autoTbs[i].Text = dt.Rows[i]["Automatisch"].ToString();
  for (int i=0; i<manuTbs.Count; i++)
    manuTbs[i].Text = dt.Rows[i]["Manuell"].ToString();
}

private void btnSichern_Click(object sender, System.EventArgs e)
{
  for (int i=0; i<manuTbs.Count; i++)
    dt.Rows[i]["Manuell"] = manuTbs[i].Text;
  dataAdapter.Update(ds.Tables[dataTableName]);
}

public class TextBoxen : CollectionBase 
{ 
  private TextBoxComparer textBoxComparer = new TextBoxComparer();

  public TextBox this[int index] 
  {
    get {return (TextBox) this.List[index];} 
    set {this.List[index] = value;}
  }

  public void Add(TextBox tbx)
  { 
    int index = this.InnerList.BinarySearch(tbx, textBoxComparer); 
    if (index<0) index = Math.Abs(index)-1; 
    this.List.Insert(index, tbx);
  }

  class TextBoxComparer : IComparer
  {
    private int Index(object tb)
    { return int.Parse(Regex.Match(((TextBox)tb).Name, "\\d+").Value);
    }
    public int Compare(object x, object y)
    { return Index(x).CompareTo(Index(y));
    }
  }
}

private void InitDatabase()
{
  string dataBaseName = "Texte.mdb";
  string dataSource = Path.Combine(Application.StartupPath, dataBaseName);
  if (!File.Exists(dataSource))
    dataSource = Path.Combine(Application.StartupPath, @"..\..\"+dataBaseName);
  if (!File.Exists(dataSource))
  { MessageBox.Show("Datenbank existiert nicht: " + dataBaseName); return;
  }
  dataSource = Path.GetFullPath(dataSource);
  string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0; " + "Data Source=\""+ dataSource + "\"";
  string selectQuery = "Select * From " + dataTableName;
  try
  {
    OleDbConnection conn = new OleDbConnection(connectionString);
    dataAdapter.SelectCommand = new OleDbCommand(selectQuery, conn);
    OleDbCommandBuilder cb = new OleDbCommandBuilder(dataAdapter);
    dataAdapter.Fill(ds, dataTableName);
  }
  catch (OleDbException exp)
  {
    foreach (OleDbError err in exp.Errors) MessageBox.Show(err.Message);
  } 
  dt = ds.Tables[dataTableName];
}


private void InitControls(Control control)
{
  foreach (Control ctl in control.Controls)
  {
    if (ctl.Controls.Count > 0) InitControls(ctl);
    TextBox tb = ctl as TextBox;
    if (tb != null) 
    {
      if (tb.Name.EndsWith ("a")) manuTbs.Add(tb);
      if (!tb.Name.EndsWith("a")) autoTbs.Add(tb);
    }
  }
}