practiceset_unit.pas

学校班级教学管理系统 DELPHI7下的

unit PracticeSet_Unit;

interface

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

type
  TfrmPracticeSet = class(TfrmBase)
    Panel1: TPanel;
    Panel2: TPanel;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    cmbxStudentID: TDBLookupComboBox;
    cmbxClassName: TDBLookupComboBox;
    memRemark: TDBMemo;
    memPracticeName: TDBMemo;
    memPracticeResult: TDBMemo;
    btnAdd: TBitBtn;
    btnModify: TBitBtn;
    btnDel: TBitBtn;
    btnSave: TBitBtn;
    btnCancel: TBitBtn;
    DBGrid1: TDBGrid;
    Label6: TLabel;
    edtPracticeDateTime: TDBEdit;
    SpeedButton1: TSpeedButton;
    DataPractice: TDataSource;
    DataStudentID: TDataSource;
    DataClassName: TDataSource;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure SpeedButton1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure btnAddClick(Sender: TObject);
    procedure btnDelClick(Sender: TObject);
    procedure btnSaveClick(Sender: TObject);
    procedure btnModifyClick(Sender: TObject);
    procedure btnCancelClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmPracticeSet: TfrmPracticeSet;

implementation

uses Common_Unit, DM_Unit, DateChoice_Unit;

{$R *.dfm}

procedure TfrmPracticeSet.FormClose(Sender: TObject;
  var Action: TCloseAction);
begin
  inherited;
  frmPracticeSet := nil;
end;

procedure TfrmPracticeSet.SpeedButton1Click(Sender: TObject);
begin
  inherited;
  Flag := 3;
  frmDateChoice := TfrmDateChoice.Create(Self);
  try
    frmDateChoice.ShowModal;
    edtPracticeDateTime.Text := DateToStr(frmDateChoice.MonthCalendar1.Date);
  finally
    frmDateChoice.Free;
  end;
end;

procedure TfrmPracticeSet.FormCreate(Sender: TObject);
var
  SQLPractice, SQLClassName, SQLStudentID: string;
begin
  inherited;
  SQLPractice := 'Select * From Practice';
  DataPractice.DataSet := SQLDataSet(SQLPractice,DM.ADOConn);   //连接数据库

  SQLClassName := 'Select * From ClassInfo';
  DataClassName.DataSet := SQLDataSet(SQLClassName,DM.ADOConn);

  SQLStudentID := 'Select * From StudentInfo';
  DataStudentID.DataSet := SQLDataSet(SQLStudentID,DM.ADOConn);
end;

procedure TfrmPracticeSet.btnAddClick(Sender: TObject);
begin
  inherited;
  DataPractice.DataSet.Insert;
end;

procedure TfrmPracticeSet.btnDelClick(Sender: TObject);
begin
  inherited;
  if Application.MessageBox('确定要删除此条记录?', '提示', 68) = IDNo then
    Exit;
  DataPractice.DataSet.Delete;
end;

procedure TfrmPracticeSet.btnSaveClick(Sender: TObject);
begin
  inherited;
  if DataPractice.State in [dsInsert,dsEdit] then          //判断状态,只有在添加或是修改的时候才能保存信息
    DataPractice.DataSet.Post;
end;

procedure TfrmPracticeSet.btnModifyClick(Sender: TObject);
begin
  inherited;
  DataPractice.DataSet.Edit;
end;

procedure TfrmPracticeSet.btnCancelClick(Sender: TObject);
begin
  inherited;
  DataPractice.DataSet.Cancel;
end;

end.