检测DataGridView checkbox是否被选中、勾选

在绑定DataGridView控件的CellContentClick事件中作判断
重点属性是使用EditedFormattedValue属性
检测是否是DataGridView中button按钮被点击

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            // 检测是否是button按钮被点击，使用列名称等于Delete判断
            if (dataGridView1.Columns[e.ColumnIndex].Name == "Delete")
            {

                dataGridView1.Rows.RemoveAt(e.RowIndex);

            }
            // 检测是否是checkbox列，使用列名称等于select判断
            if (dataGridView1.Columns[e.ColumnIndex].Name == "select")
            {
                DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell)dataGridView1.Rows[e.RowIndex].Cells["select"];
                // or
               // DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell)dataGridView1.Rows[e.RowIndex].Cells[0];

                if ((bool)chk.EditedFormattedValue)
                {

                    Console.WriteLine("is checked");
 
                }
                else
                {

                    Console.WriteLine("is unchecked");
                }
            }
        }

读取DataGridView checkbox被选中、勾选的列索引值

        private void btn_update_selected_Click(object sender, EventArgs e)
        {
            DataGridViewSelectedRowCollection dataGridViewSelectedRowCollection = dataGridView1.SelectedRows;
            DataGridViewRowCollection rowCollection = dataGridView1.Rows;

            for(int i = 0; i < rowCollection.Count; i++) {

                if ((bool)rowCollection[i].Cells[0].EditedFormattedValue) {

                    Console.WriteLine("选中的列index：" + i);

                }

            }
        }