dataGridView1 checkbox全选

  private void AddHeaderCheckBox()
        {
            HeaderCheckBox = new CheckBox();
            HeaderCheckBox.Size = new Size(20, 20);
            dataGridView1.Controls.Add(HeaderCheckBox);
        }
 private void HeaderCheckBox_MouseClick(object sender, MouseEventArgs e)
        {
            HeaderCheckBoxClick((CheckBox)sender);
        }

        private void HeaderCheckBox_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Space)
                HeaderCheckBoxClick((CheckBox)sender);
        }

        private void HeaderCheckBoxClick(CheckBox HCheckBox)
        {
            IsHeaderCheckBoxClicked = true;
           
          
            foreach (DataGridViewRow Row in dataGridView1.Rows)
                ((DataGridViewCheckBoxCell)Row.Cells["selected"]).Value = HCheckBox.Checked;
            if (HCheckBox.Checked)
            {
                foreach (var item in allPatientsId)
                {
                    listPatientId.Add(item);
                }
            }
            else
            {
                listPatientId = new List<string>();
            }
            dataGridView1.RefreshEdit();
            Console.WriteLine("HeaderCheckBoxClick:");
            foreach (var item in listPatientId)
            {
                Console.WriteLine(item);
            }
            TotalCheckedCheckBoxes = HCheckBox.Checked ? TotalCheckBoxes : 0;

            IsHeaderCheckBoxClicked = false;
        }

        private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            if (e.RowIndex == -1 && e.ColumnIndex == 0)
                ResetHeaderCheckBoxLocation(e.ColumnIndex, e.RowIndex);
        }


        private void ResetHeaderCheckBoxLocation(int ColumnIndex, int RowIndex)
        {
            //Get the column header cell bounds
            Rectangle oRectangle = this.dataGridView1.GetCellDisplayRectangle(ColumnIndex, RowIndex, true);

            Point oPoint = new Point();

            oPoint.X = oRectangle.Location.X + (oRectangle.Width - HeaderCheckBox.Width) / 2 + 1;
            oPoint.Y = oRectangle.Location.Y + (oRectangle.Height - HeaderCheckBox.Height) / 2 + 1;

            //Change the location of the CheckBox to make it stay on the header
            HeaderCheckBox.Location = oPoint;
        }