Delphi实现Dbgrid全选和反选、清除全选的功能，不管是在Delphi下，还是在WEB开发中，这种功能都是很实用的，是进行数据批量操作的基础。本模块就是实现了为Delphi的DBGrid数据列表增加全选内容、清除全选的功能，很实用了，代码内容如下：
//全选 procedure TFrameCustSelector.ToolButton1Click(Sender: TObject); var OldCurrent: TBookmark; begin OldCurrent := DBGrid1.DataSource.DataSet.Bookmark; DBGrid1.DataSource.DataSet.DisableControls; DBGrid1.DataSource.DataSet.First ; while not DBGrid1.DataSource.DataSet.Eof do begin DBGrid1.SelectedRows.CurrentRowSelected := true; DBGrid1.DataSource.DataSet.Next; end; DBGrid1.DataSource.DataSet.GotoBookmark(OldCurrent); DBGrid1.DataSource.DataSet.EnableControls; end; //清除全选 procedure TFrameCustSelector.ToolButton2Click(Sender: TObject); var OldCurrent: TBookmark; begin OldCurrent := DBGrid1.DataSource.DataSet.Bookmark; DBGrid1.DataSource.DataSet.DisableControls; DBGrid1.DataSource.DataSet.First ; while not DBGrid1.DataSource.DataSet.Eof do begin DBGrid1.SelectedRows.CurrentRowSelected := False; DBGrid1.DataSource.DataSet.Next; end; DBGrid1.DataSource.DataSet.GotoBookmark(OldCurrent); DBGrid1.DataSource.DataSet.EnableControls; end; //反选 procedure TFrameCustSelector.ToolButton3Click(Sender: TObject); var OldCurrent: TBookmark; begin OldCurrent := DBGrid1.DataSource.DataSet.Bookmark; DBGrid1.DataSource.DataSet.DisableControls; DBGrid1.DataSource.DataSet.First ; while not DBGrid1.DataSource.DataSet.Eof do begin DBGrid1.SelectedRows.CurrentRowSelected := not DBGrid1.SelectedRows.CurrentRowSelected; DBGrid1.DataSource.DataSet.Next; end; DBGrid1.DataSource.DataSet.GotoBookmark(OldCurrent); DBGrid1.DataSource.DataSet.EnableControls; end;