軒袁寨

 private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
		
	   //判定更新欄位  抓位子
           //方法一 
            if (dataGridView1.CurrentCell.RowIndex != -1 && this.dataGridView1.CurrentCell.ColumnIndex == 4)  //指定選擇的欄位索引 0 1.2.3.4
            {
              //也可參考之前寫的 http://www.dotblogs.com.tw/joe80075/archive/2012/11/29/85232.aspx
	      //把觸發的事件內容寫成類別之後可以重複使用
            }
           //判定更新欄位  抓TypeName
           //方法二 
            if (dataGridView1.CurrentCell.RowIndex != -1 && dataGridView1.CurrentCell.GetType().Name == "DataGridViewComboBoxCell")    
            {
                ComboBox comboBox = (ComboBox)e.Control;
                rowflag = dataGridView1.CurrentRow.Index;
                comboBox.Leave += new EventHandler(comboBoxLeave);  加入觸發事件
            }  


        }
        int rowflag = 0;

        void comboBoxLeave(object sender, EventArgs e)
        {
            ComboBox comboBox = (ComboBox)sender;  
            if (comboBox.Text == "結案")
            {
               this.dataGridView1.Rows[rowflag].Cells[7].Value = DateTime.Now.ToShortDateString();
            }
        }