DataGridView 单击单元格启动编辑

 int CIndex = e.ColumnIndex;
            if (e.RowIndex >= 0 && e.ColumnIndex >= 0)
            {
                DataGridViewComboBoxColumn combo = dataGridView1.Columns[e.ColumnIndex] as DataGridViewComboBoxColumn;
                if (combo != null)  //如果该列是ComboBox列
                {
                    dataGridView1.BeginEdit(false); //结束该列的编辑状态
                    DataGridViewComboBoxEditingControl comboEdite = dataGridView1.EditingControl as DataGridViewComboBoxEditingControl;
                    if (comboEdite != null)
                    {
                        comboEdite.DroppedDown = true; //展现下拉列表
                    }
                }
                DataGridViewTextBoxColumn textbox = dataGridView1.Columns[e.ColumnIndex] as DataGridViewTextBoxColumn;
                if (textbox != null) //如果该列是TextBox列
                {
                    dataGridView1.BeginEdit(true); //开始编辑状态
                }
            }