全选 设置全选button，选中所有的checkbox private void selectAll_Click(object sender, EventArgs e) { //遍历datagridview中的每一行，判断是否选中，若为选中，则选中 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; } } 取消全选 设置取消全选button，取消选中的所有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; } }