删除选中记录

方法1：独立事件单独写法

procedure TForm3.N13Click(Sender: TObject);
var
MyAdoq:TADOQuery;
begin
  MyAdoq := TADOQuery.Create(nil);
  try
    MyAdoq.Connection := frmDataPool.ADOConnection1;
    with MyAdoq do
    begin
      SQL.Text := 'DELETE from 需要做的事 where 选中 = true';
      ExecSQL;
    end;
    //防止程序假死
    Application.ProcessMessages;
    //刷新纪录
    frmDataPool.qry需要做的事.Close;
    frmDataPool.qry需要做的事.Open;
  finally
    MyAdoq.Free;
  end;
end;

方法2：类写法

unit UDeleteSelectTrue;

interface
uses  FDataPool, Data.DB, Data.Win.ADODB, Vcl.Menus,  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ComCtrls,
  Vcl.ExtCtrls, Vcl.DBCtrls, Vcl.Grids, Vcl.DBGrids, Clipbrd,
  Vcl.StdCtrls;
type TDeleteSelectTrue = class
  public
  class procedure deletetruerecord(var sAdq:TADOQuery);
end;

implementation
 class procedure TDeleteSelectTrue.deletetruerecord(var sAdq: TADOQuery);
  var
  ABiao: string;
 begin
  ABiao:=copy(sAdq.name,4,length(sAdq.name)-3);
  try
    with TADOQuery.Create(nil) do
    begin
      Connection := frmDataPool.ADOConnection1;
      if messagedlg('删除选中记录?',mtconfirmation,[mbyes,mbno],0)<>mryes then
       Abort
      else
      begin
      SQL.Text := 'DELETE FROM ' + ABiao + ' WHERE 选中 = true';
      //showmessage(sql.text);
      ExecSQL;
      end;
    end;
    //防止程序假死
    Application.ProcessMessages;
    //刷新纪录
    sAdq.Requery();
 finally
 TADOQuery.Create(nil).Free;
 end;
 end;
end.

类引用：uses语句中添加类单元名（UDeleteSelectTrue）；

procedure TForm3.N13Click(Sender: TObject);
begin
TDeleteSelectTrue.deletetruerecord(frmDataPool.qry需要做的事);  //删除选中记录
end;