visitold.pas

主要是介绍DELPHI三层应用以及分布式数据库的应用

unit visitold;

interface

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

type
  Tfrm_visitold = class(TForm)
    PageControl1: TPageControl;
    TabSheet1: TTabSheet;
    Panel1: TPanel;
    Panel2: TPanel;
    btn_first: TButton;
    btn_prev: TButton;
    btn_next: TButton;
    btn_last: TButton;
    btn_addnew: TButton;
    btn_edit: TButton;
    btn_save: TButton;
    btn_cancel: TButton;
    btn_delete: TButton;
    TabSheet2: TTabSheet;
    GroupBox6: TGroupBox;
    DBGrid1: TDBGrid;
    qvisitold: TQuery;
    dsvisitold: TDataSource;
    quse: TQuery;
    Label2: TLabel;
    Label3: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    EditDBEdit2: TDBEdit;
    MemoDBMemo: TDBMemo;
    EditDBEdit4: TDBEdit;
    EditDBEdit5: TDBEdit;
    Label7: TLabel;
    Label8: TLabel;
    DBEdit2: TDBEdit;
    Label12: TLabel;
    EditDBEdit7: TDBEdit;
    Label13: TLabel;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    Label1: TLabel;
    Panel4: TPanel;
    Label4: TLabel;
    Label14: TLabel;
    Label15: TLabel;
    Label16: TLabel;
    DBGrid2: TDBGrid;
    Panel5: TPanel;
    Label17: TLabel;
    Label18: TLabel;
    Label19: TLabel;
    Label20: TLabel;
    Label21: TLabel;
    DBComboBox1: TDBComboBox;
    qmachine: TQuery;
    dsmachine: TDataSource;
    GroupBox3: TGroupBox;
    cbbsc: TComboBox;
    GroupBox4: TGroupBox;
    cbcstmname: TComboBox;
    GroupBox5: TGroupBox;
    Label22: TLabel;
    Label23: TLabel;
    cbyear: TComboBox;
    cbmonth: TComboBox;
    Panel3: TPanel;
    btn_brs: TButton;
    btn_qry: TButton;
    btn_clr: TButton;
    btn_prt: TButton;
    updtvisitold: TUpdateSQL;
    Label24: TLabel;
    Label25: TLabel;
    Label26: TLabel;
    DBComboBox2: TDBComboBox;
    DBComboBox3: TDBComboBox;
    DBComboBox4: TDBComboBox;
    GroupBox1: TGroupBox;
    Label10: TLabel;
    Label11: TLabel;
    Label9: TLabel;
    Label27: TLabel;
    DBEdit7: TDBEdit;
    DBEdit8: TDBEdit;
    DBEdit9: TDBEdit;
    DBEdit10: TDBEdit;
    DBComboBox5: TDBComboBox;
    GroupBox2: TGroupBox;
    Label28: TLabel;
    Label29: TLabel;
    city: TEdit;
    province: TEdit;
    procedure qvisitoldAfterScroll(DataSet: TDataSet);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);

    procedure btn_firstClick(Sender: TObject);
    procedure btn_lastClick(Sender: TObject);
    procedure btn_addnewClick(Sender: TObject);
    procedure btn_saveClick(Sender: TObject);
    procedure btn_prevClick(Sender: TObject);
    procedure btn_nextClick(Sender: TObject);
    procedure btn_editClick(Sender: TObject);
    procedure btn_cancelClick(Sender: TObject);
    procedure btn_deleteClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure btn_brsClick(Sender: TObject);
    procedure btn_clrClick(Sender: TObject);
    procedure btn_qryClick(Sender: TObject);
    procedure TabSheet2Enter(Sender: TObject);
    procedure DBComboBox1Exit(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure btn_prtClick(Sender: TObject);
    procedure DBComboBox5Exit(Sender: TObject);
    procedure FormKeyPress(Sender: TObject; var Key: Char);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
    procedure LockEdit;
    //定义函数，来改变各个输入框是否可以编辑，当用户再增加新记录
    //或者编辑记录以前，不可以修改
    procedure UnlockEdit;
    //定义函数，用来让输入文本框可以编辑
    procedure DisableBtn;
    //定义过程，用来使某些按钮失效
    procedure EnableBtn;
    //定义过程，用来使某些按钮有效
  public
    { Public declarations }
 
  end;

var
  Frm_visitold: Tfrm_visitold;

implementation

uses  data, rp_visitold, Unit_wxp;



{$R *.dfm}
//***************释放空间********************
procedure Tfrm_visitold.FormClose(Sender: TObject;
  var Action: TCloseAction);
begin
        Action:=cafree;
end;

//***************以下是自定义的按纽和编辑的可否应用部分*********************
//自定义过程，用来确定每个Edit空间是否可以编辑
procedure Tfrm_visitold.LockEdit;
begin

panel1.Enabled :=false;
DBEdit2.Enabled :=false;
DBEdit3.Enabled :=false;
DBEdit4.Enabled :=false;
EditDBEdit7.Enabled :=false;
end;

procedure Tfrm_visitold.UnlockEdit ;
begin
Panel1.Enabled :=true;
DBEdit2.Enabled :=false;
DBEdit3.Enabled :=false;
DBEdit4.Enabled :=false;
EditDBEdit7.Enabled :=false;
end;


procedure Tfrm_visitold.DisableBtn ;
begin
    btn_first.Enabled :=false;
    btn_prev.Enabled :=false;
    btn_next.Enabled :=false;
    btn_last.Enabled :=false;

    btn_delete.Enabled :=false;
    btn_addnew.Enabled :=false;
    btn_edit.Enabled :=false;
end;

procedure Tfrm_visitold.EnableBtn ;
begin
    btn_first.Enabled :=true;
    btn_prev.Enabled :=true;
    btn_next.Enabled :=true;
    btn_last.Enabled :=true;
    btn_delete.Enabled :=true;
    btn_addnew.Enabled :=true;
    btn_edit.Enabled :=true;
end;

//***************以上是自定义的按纽和编辑的可否应用部分*********************

//***************以下是按纽操作。*********************

procedure Tfrm_visitold.btn_firstClick(Sender: TObject);
begin
        if not qvisitold.Bof then qvisitold.First;

end;

procedure Tfrm_visitold.btn_lastClick(Sender: TObject);
begin
        if not qvisitold.eof then qvisitold.Last;
end;
 procedure Tfrm_visitold.btn_prevClick(Sender: TObject);
begin
        if not qvisitold.Bof then qvisitold.Prior;

end;

procedure Tfrm_visitold.btn_nextClick(Sender: TObject);
begin
        if not qvisitold.Eof then qvisitold.Next;
end;
procedure Tfrm_visitold.btn_addnewClick(Sender: TObject);
var
  Present: TDateTime;
begin
        UnlockEdit;
        qvisitold.append;
        dbcombobox5.SetFocus ;

        DisableBtn;
        btn_save.Enabled :=true;
        btn_cancel.Enabled :=true;
//给下面审核栏默认值：

//日期：
    Present:= Now;
    qvisitold.fieldbyname('录入日期').AsString :=datetimetostr(present);
//人名：
  with quse do begin
    if active then close;
    unprepare;
    sql.Clear;
    sql.Add('select 主管,审核,录入 from pub_z_visitold');
    prepare;
    open;
    last;
    qvisitold.fieldbyname('主管').AsString:=fieldbyname('主管').AsString;
    qvisitold.fieldbyname('审核').AsString:=fieldbyname('审核').AsString;
    qvisitold.fieldbyname('录入').AsString:=fieldbyname('录入').AsString;
  end;
end;

procedure Tfrm_visitold.btn_saveClick(Sender: TObject);
begin
    if (qvisitold.fieldbyname('年').AsString='') or (qvisitold.fieldbyname('月').AsString='') or (qvisitold.fieldbyname('日').AsString='') then
    begin
       application.MessageBox('回访日期请完整填写！','提示',MB_OK);
       DBComboBox4.Focused ;
    end
    else begin
      qvisitold.fieldbyname('办事处').AsString:=qvisitold.fieldbyname('所属办事处').AsString;
      with data.zxjxdata do begin
      if not DatabaseJxw.intransaction then DatabaseJxw.starttransaction;
      try
      qvisitold.ApplyUpdates;
      DatabaseJxw.commit;
      qvisitold.CommitUpdates ;
        //使编辑框和按钮有反应：
        LockEdit;
        EnableBtn ;
        btn_save.Enabled :=false;
        btn_cancel.Enabled :=false;
      except
        DatabaseJxw.Rollback;
        raise;
      end;

    end;
   end;
{    qvisitold.Close ;
    qvisitold.Open ;

 }
end;



procedure Tfrm_visitold.btn_editClick(Sender: TObject);
begin
        qvisitold.Edit ;
        //让文本框可以编辑
        UnlockEdit;
        //使一些按钮失效
        DisableBtn;
        btn_save.Enabled :=true;
        btn_cancel.Enabled :=true;

end;