DataGridview中，选中某单元格下拉框，一行记录字体变色……

Question

选中某单元格下拉框，1，2，我选2就蓝色，1就变红色……
请问该怎么做

Answer 1

哪里变颜色
private void dataGridView1_EditingControlShowing(object sender,
  DataGridViewEditingControlShowingEventArgs e)
{
  ComboBox combo = e.Control as ComboBox;
  if (combo != null)
  {
  combo.SelectedIndexChanged +=
  new EventHandler(ComboBox_SelectedIndexChanged);
  }
}
private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
 ComboBox cb=(ComboBox)sender;
}

Answer 2

dataGridView1.Rows[你要改变的行].DefaultCellStyle.ForeColor