unit15.~pas

学生信息管理系统 学生信息管理系统 学生信息管理系统

unit Unit15;

interface

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

type
  Tjsxxcx = class(TForm)
    GroupBox1: TGroupBox;
    GroupBox2: TGroupBox;
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    DBGrid1: TDBGrid;
    StatusBar1: TStatusBar;
    ADOQuery1: TADOQuery;
    DataSource1: TDataSource;
    GroupBox3: TGroupBox;
    Button4: TButton;
    Label2: TLabel;
    Label3: TLabel;
    Edit2: TEdit;
    Edit3: TEdit;
    Label4: TLabel;
    Label5: TLabel;
    Edit4: TEdit;
    Edit5: TEdit;
    SpeedButton1: TSpeedButton;
    procedure Button4Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
    procedure Button1Click(Sender: TObject);
    procedure FormActivate(Sender: TObject);
    procedure SpeedButton1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  jsxxcx: Tjsxxcx;

implementation
  uses unit1;
{$R *.dfm}

procedure Tjsxxcx.Button4Click(Sender: TObject);
begin
self.Close;
end;

procedure Tjsxxcx.Button3Click(Sender: TObject);
begin
ADOquery1.Prior;
end;

procedure Tjsxxcx.Button2Click(Sender: TObject);
begin
ADOquery1.Next;
end;

procedure Tjsxxcx.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if not (key in['0'..'9',#8])then
   begin
   key:=#0;
   Application.MessageBox('教师号只能填写数字','警告',0+64)
   end;
end;

procedure Tjsxxcx.Button1Click(Sender: TObject);
begin
if(edit1.Text='')then
begin
  application.MessageBox('请输入教师号','提示',0+64);
  exit;
end;
 ADOquery1.SQL.Clear;
    ADOquery1.Close;
    ADOquery1.SQL.Add('select *from t_jiaoshi where 教师号='''+edit1.text+'''');
     //MessageBox(handle,'查询完毕!','提示',MB_OK or MB_ICONINFORMATION);
    dbgrid1.Font.Color:=clgreen;
    ADOquery1.Open;
    edit1.SetFocus;
    edit1.SelectAll;

   if ADOquery1.RecordCount=0 then
    begin
    application.MessageBox('你输入的教师号数据不存在','提示',0+64);
    exit;
    end;

end;

procedure Tjsxxcx.FormActivate(Sender: TObject);
 var
  sqlstr:string;
begin
sqlstr:='select *from t_jiaoshi';
  Adoquery1.Close;
  ADOquery1.SQL.Clear;
  ADOquery1.SQL.Add(sqlstr);
  ADOquery1.Open;
end;

procedure Tjsxxcx.SpeedButton1Click(Sender: TObject);
var
sql:string;
begin
if(edit2.Text<>'')or(edit3.Text<>'')or(edit4.Text<>'')or(edit5.Text<>'')then
  sql:='where (教师号 like '''+'%'+edit2.Text+'%'' )or(姓名 like '''+'%'+edit3.Text+'%'')or(职务 like '''+'%'+edit4.Text+'%'')or(授课教程 like '''+'%'+edit5.Text+'%'')'
else
  begin
   application.MessageBox('输入查询条件','提示',mb_ok);
   exit;
  end;
 ADOquery1.SQL.Clear;
 ADOquery1.Close;
 ADOquery1.SQL.Add('select * from t_jiaoshi');
 ADOquery1.SQL.Add(sql);
 ADoquery1.Open;
end;

end.