//全選
        private void button1_Click_1(object sender, EventArgs e)
        {
            
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                this.dataGridView1.Rows[i].Cells[0].Value = true;
            }
        }
        //反選
        private void button6_Click(object sender, EventArgs e)
        {
           
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                this.dataGridView1.Rows[i].Cells[0].Value = false;
            }
        }