unit1.pas

一系列DELPHI的控件如何使用的例子,例子有的比较简单,但是能详细的说明了控件的使用,对许多刚涉足DELPHI的朋友会很有帮助的

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DB, DBTables, Grids, DBGrids, ExtCtrls;

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Panel2: TPanel;
    Panel3: TPanel;
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    Query1: TQuery;
    Query2: TQuery;
    procedure DBGrid1DblClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.DBGrid1DblClick(Sender: TObject);
begin
    if messageDLG('确认是否删除',mtconfirmation,[mbyes,mbno],0)=mrno then
       exit;
    with Query2 do
      begin
       close;
       sql.Clear;
       sql.Add('delete from country where name=:name');
       parambyname('name').AsString:=DBGrid1.Fields[0].AsString;
       Prepare;
       execsql;
       end;
    with query1 do
      begin
        close;
        open;
      end;
end;

end.