全選

設定全選button，選中所有的checkbox

        private void selectAll_Click(object sender, EventArgs e)
        {
        //遍歷datagridview中的每一行，判斷是否選中，若為選中，則選中
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                if ((Convert.ToBoolean(dataGridView1.Rows[i].Cells[0].Value) == false
 
))
                {
                    dataGridView1.Rows[i].Cells[0].Value = "True";
                }
                else
                    continue;
            }
        }

取消全選

設定取消全選button，取消選中的所有checkbox

        private void cancelAll_Click(object sender, EventArgs e)
        {
            for
 
 (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                if ((Convert.ToBoolean(dataGridView1.Rows[i].Cells[0].Value) == true))
                {
                    dataGridView1.Rows[i].Cells[0].Value = "False";
                }
                else
                    continue
 
;
            }
        }