Winform中DataGridView实现全选和反选

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dataGridView1中添加checkbox列，实现全选和反选：

//全选

private void CheckAll_CheckedChanged(object sender, EventArgs e)
        {
            if (dataGridView1.Rows.Count>0)
            {
                for (int i = 0; i < dataGridView1.Rows.Count; i++)
                {
                    dataGridView1.Rows[i].Cells[0].Value = true;
                }
            }
        }

//反选

private void CheckReverse_CheckedChanged(object sender, EventArgs e)
        {
            if (dataGridView1.Rows.Count>0)
            {
                for (int i = 0; i < dataGridView1.Rows.Count; i++)
                {
                    if ((bool)dataGridView1.Rows[i].Cells[0].EditedFormattedValue)
                    {
                        dataGridView1.Rows[i].Cells[0].Value = false;
                    }
                    else
                        dataGridView1.Rows[i].Cells[0].Value = true;
                }
            }
        }

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