C#Winform窗體 DataGridView全選按鈕的實現方式

最近，在做CS程序遇到一個頭疼的問題，datagridview列表的全選按鈕遇到各種問題，做的是自適應窗體大小，當窗體最大化導致全選按鈕出現與列表數據不一致，特別不搭配，試了很久，網上也找了好多資料各種試最終還是解決了這個問題，具體實現的方法詳見下面代碼

 

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BMIS.POS
{
    public delegate void CheckBoxClickedHandler(bool state);
    public class DataGridViewCheckBoxHeaderCellEventArgs : EventArgs
    {
        bool _bChecked;
        public DataGridViewCheckBoxHeaderCellEventArgs(bool bChecked)
        {
            _bChecked = bChecked;
        }
        public bool Checked
        {
            get { return _bChecked; }
        }
    }

    class DatagridViewCheckBoxHeaderCell : DataGridViewColumnHeaderCell
    {
        Point checkBoxLocation;
        Size checkBoxSize;
        bool _checked = false;
        Point _cellLocation = new Point();
        System.Windows.Forms.VisualStyles.CheckBoxState _cbState = System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal;

        public event CheckBoxClickedHandler OnCheckBoxClicked;

        public DatagridViewCheckBoxHeaderCell()
        {
        }

        protected override void Paint(System.Drawing.Graphics graphics,
            System.Drawing.Rectangle clipBounds,
            System.Drawing.Rectangle cellBounds,
            int rowIndex,
            DataGridViewElementStates dataGridViewElementState,
            object value,
            object formattedValue,
            string errorText,
            DataGridViewCellStyle cellStyle,
            DataGridViewAdvancedBorderStyle advancedBorderStyle,
            DataGridViewPaintParts paintParts)
        {
            base.Paint(graphics, clipBounds, cellBounds, rowIndex,
                dataGridViewElementState, value,
                formattedValue, errorText, cellStyle,
                advancedBorderStyle, paintParts);
            Point p = new Point();
            Size s = CheckBoxRenderer.GetGlyphSize(graphics,
            System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal);
            p.X = cellBounds.Location.X +
                (cellBounds.Width / 2) - (s.Width / 2);
            p.Y = cellBounds.Location.Y +
                (cellBounds.Height / 2) - (s.Height / 2);
            _cellLocation = cellBounds.Location;
            checkBoxLocation = p;
            checkBoxSize = s;
            if (_checked)
                _cbState = System.Windows.Forms.VisualStyles.
                    CheckBoxState.CheckedNormal;
            else
                _cbState = System.Windows.Forms.VisualStyles.
                    CheckBoxState.UncheckedNormal;
            CheckBoxRenderer.DrawCheckBox
            (graphics, checkBoxLocation, _cbState);
        }

        protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)
        {
            Point p = new Point(e.X + _cellLocation.X, e.Y + _cellLocation.Y);
            if (p.X >= checkBoxLocation.X && p.X <=
                checkBoxLocation.X + checkBoxSize.Width
            && p.Y >= checkBoxLocation.Y && p.Y <=
                checkBoxLocation.Y + checkBoxSize.Height)
            {
                _checked = !_checked;
                if (OnCheckBoxClicked != null)
                {
                    OnCheckBoxClicked(_checked);
                    this.DataGridView.InvalidateCell(this);
                }

            }
            base.OnMouseClick(e);
        }
    }
}

　　這個類是創建全選按鈕的類方法，然后在窗體的初始事件調用，我這里 以我的datagridview  名稱為 dgvPackList  為例，在實際使用的時候名稱統一換一下，在列表上就不需要添加CheckBox列，會自動創建的，至此，綁定完數據運行即可看到效果了。當遇到一些錯誤的時候需要添加一個dataerror的事件，可以什么都不用寫，保留這個事件就可以了；

  private void cbHeader_OnCheckBoxClicked(bool state)
        {
            //這一句很重要結束編輯狀態
            dgvPackList.EndEdit();
            dgvPackList.Rows.OfType<DataGridViewRow>().ToList().ForEach(t => t.Cells[0].Value = state);
        }

        private void InitColumnInfo()
        {
            int index = 0;

            DataGridViewCheckBoxColumn colCB = new DataGridViewCheckBoxColumn();
            DatagridViewCheckBoxHeaderCell cbHeader = new DatagridViewCheckBoxHeaderCell();
            colCB.HeaderCell = cbHeader;
            colCB.HeaderText = "";
            colCB.FillWeight = 50;
            cbHeader.OnCheckBoxClicked += new CheckBoxClickedHandler(cbHeader_OnCheckBoxClicked);
            dgvPackList.Columns.Insert(index, colCB);

            System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle2 = new System.Windows.Forms.DataGridViewCellStyle();
            dataGridViewCellStyle2.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter;//211, 223, 240
            dataGridViewCellStyle2.ForeColor = System.Drawing.Color.Blue;
            dataGridViewCellStyle2.SelectionForeColor = System.Drawing.Color.Blue;
            dgvPackList.Columns[index].DefaultCellStyle = dataGridViewCellStyle2;
        }