studentunit.pas

一个功能完美的学生成绩管理系统 使用ACCESS数据库在DATA文件夹中 功能强大

unit studentunit;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, DBCtrls, DB, StdCtrls, Mask, Buttons, Grids, DBGrids;

type
  Tstudentform = class(TForm)
    Panel1: TPanel;
    Label9: TLabel;
    Edit1: TMaskEdit;
    BitBtn1: TBitBtn;
    Panel2: TPanel;
    Label1: TLabel;
    DBEdit1: TDBEdit;
    Label2: TLabel;
    DBEdit2: TDBEdit;
    Label3: TLabel;
    DBEdit3: TDBEdit;
    Label4: TLabel;
    DBEdit4: TDBEdit;
    Label5: TLabel;
    DBEdit5: TDBEdit;
    Label6: TLabel;
    DBEdit6: TDBEdit;
    Label7: TLabel;
    DBEdit7: TDBEdit;
    DBImage1: TDBImage;
    Panel3: TPanel;
    DBNavigator1: TDBNavigator;
    Bevel1: TBevel;
    DBGrid1: TDBGrid;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure BitBtn1Click(Sender: TObject);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
 
  
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  studentform: Tstudentform;

implementation

uses datamoduleUnit,mainformunit;
{$R *.dfm}

procedure Tstudentform.FormClose(Sender: TObject;
  var Action: TCloseAction);
begin
 datamodule1.tablestudent.Close;
end;

procedure Tstudentform.BitBtn1Click(Sender: TObject);
var sno,tempstr :string;
begin
if (trim(edit1.Text)='')  then
  begin
    messagebox (Handle,'学号不能为空，请输入！','警告',mb_ok) ;
    exit;
  end;
 sno:=trim(edit1.Text);
 tempstr:=format('学生 %s 的信息不在数据库中',[sno]);
 with datamodule1.tablestudent do
    begin
    open;
     if not Locate('sno',sno,[]) then
         begin
            messagebox (Handle,pointer(tempstr),'反馈信息',mb_ok) ;
         end;


    end;
 edit1.Text:='';   
end;





procedure Tstudentform.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if key=#13 then
  bitbtn1.Click;
end;

end.