在DataGridView里选中下拉框后另一个单元格更改……

Question

   private void cmb_Temp_SelectedIndexChanged(object sender, EventArgs e)
        {
            int Rowx = dataGridView1.CurrentCell.RowIndex;
            if (((ComboBox)sender).Text == "买入")
            {
                dataGridView1.Rows[Rowx].DefaultCellStyle.ForeColor = Color.Blue;                dataGridView1.CurrentCell.Value = "买入";
                dataGridView1.CurrentCell.Tag = "买入";
            }
            else
            {
                dataGridView1.Rows[Rowx].DefaultCellStyle.ForeColor = Color.Red;
                dataGridView1.CurrentCell.Value = "卖出";
                dataGridView1.CurrentCell.Tag = "卖出";
            }                    }我选择买入或卖出的时候，这一行另一个单元格的内容就会跟着变.
该怎么写...
谢谢

Answer 1

除了dataGridView1可能为空外这样写的问题是?

Answer 2

//处理EditingControlShowing事件
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
  //获取正在编辑的单元格，如果是combobox，则为其挂接事件处理程序：
  ComboBox combo = e.Control as ComboBox;
  if (combo != null)
  {
  combo.SelectedIndexChanged +=
  new EventHandler(ComboBox_SelectedIndexChanged);
  }
}//当下拉框内容修改后，会触发这个事件处理程序，你在这里处理。
private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
   //
}

Answer 3

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;
}