teacherset_unit.pas

学校班级教学管理系统 DELPHI7下的

unit TeacherSet_Unit;

interface

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

type
  TfrmTeacherSet = class(TfrmDictionaryBase)
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    cmbxSex: TDBComboBox;
    edtAge: TDBEdit;
    cmbxDuty: TDBComboBox;
    edtAddress: TDBEdit;
    DataTeacher: TDataSource;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormCreate(Sender: TObject);
    procedure btnAddClick(Sender: TObject);
    procedure btnModifyClick(Sender: TObject);
    procedure btnDelClick(Sender: TObject);
    procedure btnSaveClick(Sender: TObject);
    procedure btnCancelClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmTeacherSet: TfrmTeacherSet;

implementation

uses
  Common_Unit, DM_Unit;
  
{$R *.dfm}

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

procedure TfrmTeacherSet.FormCreate(Sender: TObject);
var
  SQL: string;
begin
  inherited;
  SQL := 'Select * From TeacherInfo';
  DataTeacher.DataSet := SQLDataSet(SQL,DM.ADOConn);   //连接数据库
end;

procedure TfrmTeacherSet.btnAddClick(Sender: TObject);
var
  SQLMaxID, MaxID: string;
begin
  inherited;
  DataTeacher.DataSet.Insert;
  SQLMaxID := 'SELECT Max(TeacherID) as TeacherID FROM TeacherInfo';    //搜索最大的编号
  MaxID := SQLDataSet(SQLMaxID,DM.ADOConn).FieldByName('TeacherID').AsString;
  if MaxID = '' then
    MaxID := MaxID + '2007001'
  else
    MaxID := IntToStr(StrToInt(MaxID) + 1 );
  txtID.Caption := MaxID;
  DataTeacher.DataSet.FieldByName('TeacherID').AsString := MaxID; 
end;

procedure TfrmTeacherSet.btnModifyClick(Sender: TObject);
begin
  inherited;
  DataTeacher.DataSet.Edit;
end;

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

procedure TfrmTeacherSet.btnSaveClick(Sender: TObject);
begin
  inherited;
  if DataTeacher.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
    DataTeacher.DataSet.Post;
end;

procedure TfrmTeacherSet.btnCancelClick(Sender: TObject);
begin
  inherited;
  DataTeacher.DataSet.Cancel;
end;

end.