mrqylx_cx.pas

Delphi数据库开发系统例子

unit MRQYLX_CX;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons;

type
  TFRM_QYLX_CX = class(TForm)
    GroupBox1: TGroupBox;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    ComboBox1: TComboBox;
    ComboBox2: TComboBox;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    procedure FormShow(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
    procedure RadioButton1Click(Sender: TObject);
    procedure RadioButton2Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  FRM_QYLX_CX: TFRM_QYLX_CX;

implementation

uses DATA, MRQYLX;

{$R *.dfm}

procedure TFRM_QYLX_CX.FormShow(Sender: TObject);
begin
  combobox1.Clear;
  combobox2.Clear;
  with database.ADO_QYLX do
  begin
    close;
    sql.Clear;
    sql.Add('SELECT * FROM tb_Client_qylx');
    open;
  end;
  IF DATABASE.ADO_QYLX.RecordCount>0 THEN
  BEGIN
    while not database.ADO_QYLX.Eof do
    begin
      combobox1.Items.Add(Trim(database.ADO_QYLX.fieldbyname('qylx_id').AsString));
      combobox2.Items.Add(Trim(database.ADO_QYLX.fieldbyname('qylx_lxmc').AsString));
      database.ADO_QYLX.Next;
    end;
    database.ADO_QYLX.First;
  END;
end;

procedure TFRM_QYLX_CX.BitBtn1Click(Sender: TObject);
begin
  if RadioButton1.Checked = true then
  begin
    if combobox1.Text = '' then
    begin
      showmessage('查询条件不能为空。');
    end
    else
    begin
      with database.ADO_QYLX do
      begin
        close;
        sql.Clear;
        sql.Add('SELECT * FROM tb_Client_qylx where qylx_id='+''''+trim(combobox1.Text)+'''');
        open;
      end;
      FRM_QYLX.Edit1.Text := database.ADO_QYLX.fieldbyname('qylx_id').AsString;
      FRM_QYLX.edit2.Text := database.ADO_QYLX.fieldbyname('qylx_lxmc').AsString;
      FRM_QYLX.edit3.Text := database.ADO_QYLX.fieldbyname('qylx_bz').AsString;
    end;
  end;

  if RadioButton2.Checked = true then
  begin
    if combobox2.Text = '' then
    begin
      showmessage('查询条件不能为空。');
    end
    else
    begin
      with database.ADO_QYLX do
      begin
        close;
        sql.Clear;
        sql.Add('SELECT * FROM tb_Client_qylx where qylx_lxmc='+''''+trim(combobox2.Text)+'''');
        open;
      end;
      FRM_QYLX.Edit1.Text := database.ADO_QYLX.fieldbyname('qylx_id').AsString;
      FRM_QYLX.edit2.Text := database.ADO_QYLX.fieldbyname('qylx_lxmc').AsString;
      FRM_QYLX.edit3.Text := database.ADO_QYLX.fieldbyname('qylx_bz').AsString;
    end;
  end;

end;

procedure TFRM_QYLX_CX.RadioButton1Click(Sender: TObject);
begin
  combobox2.Text := '';
end;

procedure TFRM_QYLX_CX.RadioButton2Click(Sender: TObject);
begin
  combobox1.Text := '';
end;

procedure TFRM_QYLX_CX.BitBtn2Click(Sender: TObject);
begin
  close;
end;

end.