client.pas

《delphi数据库设计与实例开发》随书光盘

unit Client;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Mask, DBCtrls, ComCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    GroupBox1: TGroupBox;
    Label1: TLabel;
    Label2: TLabel;
    ComboBox1: TComboBox;
    Button1: TButton;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    DBEdit5: TDBEdit;
    DBEdit6: TDBEdit;
    DBEdit7: TDBEdit;
    DBEdit8: TDBEdit;
    DBEdit9: TDBEdit;
    Button3: TButton;
    DBNavigator1: TDBNavigator;
    procedure FormCreate(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
uses ClientModule;

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
 with ClientDataModule do
  begin
  ClientDataSet1.Active:=true;
  while not ClientDataSet1.Eof do
   begin
   Combobox1.Items.Add(ClientDataSet1.fieldbyName('au_lname').AsString+','+ClientDataSet1.fieldbyName('au_fname').AsString);
   ClientDataSet1.Next;
   end;
   Combobox1.Text:=Combobox1.Items[0];
   ClientDataSet1.First;
  end;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  ClientDataModule.ClientDataSet1.ApplyUpdates(-1);
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  ClientDataModule.ClientDataSet1.UndoLastChange(True);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
namelength,position:integer;
firstname,lastname:String;
begin
  position:=pos(',',Combobox1.Text);
  namelength:=Length(Combobox1.Text);
  lastname:=copy(combobox1.Text,0,position-1);
  firstname:=copy(combobox1.Text,position+1,namelength-position);
  if ClientDataModule.ClientDataSet1.Active then
  ClientDataModule.ClientDataSet1.Active:=true;
  ClientDataModule.ClientDataSet1.Locate('au_fname;au_lname',vararrayof([firstname,lastname]),[]);
end;

end.