/// <summary>/// 同步列頭checkbox與列中checkbox狀態/// </summary>/// <param name="view">GridView</param>/// <param name="fieldeName">需要繪制Checkbox的列名</param>/// <param name="e">MouseEventArgs</param>public static void SyncCheckStatus(this GridView view, string fieldeName, MouseEventArgs e){  /*說明：   *在MouseDown事件中使用   *參考：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);  }}

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