关键代码：

        /// <summary>
        /// 同步列头checkbox与列中checkbox状态
        /// </summary>
        /// <param name="view">GridView</param>
        /// <param name="fieldeName">需要绘制Checkbox的列名</param>
        /// <param name="e">MouseEventArgs</param>
        public static void SyncCheckStatus(this GridView view, string fieldeName, MouseEventArgs e)
        {
            /*说明：
             *在MouseDown事件中使用
             *参考：https://www.devexpress.com/Support/Center/Question/Details/Q354489
             *eg:
             *private void gvLampConfig_MouseDown(object sender, MouseEventArgs e)
             *{
             *GridView _view = sender as GridView;
             *_view.SyncCheckStatus(gcCheckFieldName, e);
             *}
             */
            if (e.Clicks == 1 && e.Button == MouseButtons.Left)
            {
                view.ClearSorting();
                view.PostEditor();
                GridHitInfo _info;
                Point _pt = view.GridControl.PointToClient(Control.MousePosition);
                _info = view.CalcHitInfo(_pt);
                if (_info.InColumn && _info.Column.FieldName.Equals(fieldeName))
                {
                    if (getCheckedCount(view, fieldeName) == view.DataRowCount)
                        UnChekAll(view, fieldeName);
                    else
                        CheckAll(view, fieldeName);
                }
            }
        }
        private static int getCheckedCount(GridView view, string filedName)
        {
            int count = 0;
            for (int i = 0; i < view.DataRowCount; i++)
            {
                object _cellValue = view.GetRowCellValue(i, view.Columns[filedName]);
                //if (_cellValue != null && !(_cellValue is DBNull))
                if (_cellValue == null) continue;
                if (string.IsNullOrEmpty(_cellValue.ToString().Trim())) continue;
                bool _checkStatus = false;
                if (bool.TryParse(_cellValue.ToString(), out _checkStatus))
                {
                    //if ((bool)_cellValue)
                    if (_checkStatus)
                        count++;
                }
            }
            return count;
        }
        private static void CheckAll(GridView view, string fieldName)
        {
            for (int i = 0; i < view.DataRowCount; i++)
            {
                view.SetRowCellValue(i, view.Columns[fieldName], true);
            }
        }
        private static void UnChekAll(GridView view, string fieldName)
        {
            for (int i = 0; i < view.DataRowCount; i++)
            {
                view.SetRowCellValue(i, view.Columns[fieldName], false);
            }
        }

代码使用：

        private void gvLampConfig_MouseDown(object sender, MouseEventArgs e)
        {
            GridView _view = sender as GridView;
            _view.SyncCheckStatus(gcCheckFieldName, e);
        }

代码效果：