card_lost.pas

该是一个比较好的图书馆系统,是现在大学生软件课程设计的好模板

unit card_lost;

interface

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

type
  Tcardlost = class(TForm)
    GroupBox1: TGroupBox;
    Label1: TLabel;
    Edit1: TEdit;
    Label2: TLabel;
    GroupBox2: TGroupBox;
    Label3: TLabel;
    Edit2: TEdit;
    Label4: TLabel;
    ADOCommand1: TADOCommand;
    ADOQuery1: TADOQuery;
    BitBtn1: TBitBtn;
    BitBtn2: TBitBtn;
    BitBtn3: TBitBtn;
    Image1: TImage;
   // procedure Button1Click(Sender: TObject);
  //  procedure Button2Click(Sender: TObject);
  //  procedure Button3Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
    procedure BitBtn2Click(Sender: TObject);
    procedure BitBtn3Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  cardlost: Tcardlost;

implementation
uses browse;

{$R *.dfm}

procedure Tcardlost.BitBtn1Click(Sender: TObject);
begin
 adoquery1.Close;
 adoquery1.SQL.Clear;
 adoquery1.SQL.Text:='select* from [user] where StuID='''+Edit1.Text+'''';
 adoquery1.Open;
 if  (Edit1.Text='')or(adoquery1.FieldByName('StuID').asstring='') then
  begin
 showmessage('请输入正确的用户帐号！');
 Edit1.Text:='';
  end
 else
  begin
 adoquery1.Close;
 adoquery1.SQL.Clear;
 adoquery1.SQL.Text:='select Symbol from [user] where StuID='''+Edit1.Text+'''';
 adoquery1.Open;
  if adoquery1.FieldByName('Symbol').Asinteger = 0 then
   begin
  showmessage('已挂失！');
   end
   else
   begin
 adoquery1.Close;
 adoquery1.SQL.Clear;
 adoquery1.SQL.Text:='select StuID from [user] where StuID='''+Edit1.Text+'''';
 adoquery1.Open;
   if adoquery1.FieldByName('StuID').AsString <> '' then
    begin
   adocommand1.CommandText:='update [user] set Symbol=0 where StuID='''+Edit1.Text+'''';
   adocommand1.Execute;
   showmessage('挂失成功！');
   //close;
    end
   end;
  end;
end;

procedure Tcardlost.BitBtn2Click(Sender: TObject);
begin
 adoquery1.Close;
 adoquery1.SQL.Clear;
 adoquery1.SQL.Text:='select* from [user] where StuID='''+Edit2.Text+'''';
 adoquery1.Open;
 if  (Edit2.Text='')or(adoquery1.FieldByName('StuID').asstring='') then
 //if  Edit2.Text='' then
  begin
 showmessage('请输入正确的用户帐号！');
 Edit2.Text:='';
  end
 else
  begin
 adoquery1.Close;
 adoquery1.SQL.Clear;
 adoquery1.SQL.Text:='select Symbol from [user] where StuID='''+Edit2.Text+'''';
 adoquery1.Open;
 if adoquery1.FieldByName('Symbol').Asinteger = 1 then
  begin
  showmessage('未挂失！');
  end
  else
 begin
 adoquery1.Close;
 adoquery1.SQL.Clear;
 adoquery1.SQL.Text:='select StuID from [user] where StuID='''+Edit2.Text+'''';
 adoquery1.Open;
 if adoquery1.FieldByName('StuID').AsString <> '' then
  begin
   adocommand1.CommandText:='update [user] set Symbol=1 where StuID='''+Edit2.Text+'''';
   adocommand1.Execute;
   showmessage('解除挂失成功！');
  // close;
  end
end;
end;
end;

procedure Tcardlost.BitBtn3Click(Sender: TObject);
begin
close;
end;

procedure Tcardlost.FormShow(Sender: TObject);
begin
Edit1.text:='';
Edit2.text:='';
end;

end.