check.~pas

1、系统环境要求：WindowsXP/2000 2、DELPHI7.0企业版 3、如果数据库为SQL Server数据库

unit check;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, baseform, StdCtrls, ExtCtrls, Grids, ComCtrls,ADODB, DB, DBGrids;
type
  Tf_check = class(Tf_baseform)
    Panel3: TPanel;
    Save: TButton;
    Cancel: TButton;
    Grid: TStringGrid;
    Quit: TButton;
    Lose: TRadioButton;
    More: TRadioButton;
    Panel1: TPanel;
    Counter: TComboBox;
    Radio1: TRadioButton;
    Radio2: TRadioButton;
    Depot: TComboBox;
    Label1: TLabel;
    Label2: TLabel;
    Picker1: TDateTimePicker;
    Panel2: TPanel;
    Label6: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    Label13: TLabel;
    Barcode: TEdit;
    Bookname: TEdit;
    Author: TEdit;
    Sum: TEdit;
    Grid1: TDBGrid;
    Source1: TDataSource;
    procedure QuitClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure CancelClick(Sender: TObject);
    procedure BarcodeKeyPress(Sender: TObject; var Key: Char);
    procedure BooknameKeyPress(Sender: TObject; var Key: Char);
    procedure SumKeyPress(Sender: TObject; var Key: Char);
    procedure Panel1Enter(Sender: TObject);
    procedure BarcodeKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure Grid1DblClick(Sender: TObject);
    procedure Grid1KeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure GridKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure BooknameChange(Sender: TObject);
    procedure GridSelectCell(Sender: TObject; ACol, ARow: Integer;
      var CanSelect: Boolean);
    procedure SaveClick(Sender: TObject);
  private
    { Private declarations }
  public
    procedure Cleardetail;
    Procedure ClearGrid;
    Function DetailIsNull: Boolean;
    Function GridIsNull: Boolean;
    { Public declarations }
  end;

var
  f_check: Tf_check;
  x:integer = 1;
  y: Integer = 0;
const
  c_barcode = 0;
  c_bookname = 1;
  c_author = 2;
  c_sum = 3;
implementation

  uses Data,main;
  
{$R *.dfm}

procedure Tf_check.QuitClick(Sender: TObject);
begin
  inherited;
  Close;
end;

procedure Tf_check.FormShow(Sender: TObject);
begin
  inherited;
  Grid.Cells[c_barcode,0]:= '条形码';
  Grid.Cells[c_bookname,0]:= '书籍名称';
  Grid.Cells[c_author,0]:='作者';
  Grid.Cells[c_sum,0]:='数量';
  Picker1.DateTime := Now;
  With t_data.Query1 do
  begin
    Close;
    SQL.Clear;
    SQL.Add('select depotname from tb_depotinfo');
    Open;
  end;
  while not t_data.Query1.Eof do
  begin
    Depot.Items.Add(Trim(t_data.Query1.Fields[0].Value));
    t_data.Query1.Next;
  end;
  With t_data.Query1 do
  begin
    Close;
    SQL.Clear;
    SQL.Add('select counter from tb_counter');
    Open;
  end;
  while not t_data.Query1.Eof do
  begin
    Counter.Items.Add(Trim(t_data.Query1.Fields[0].Value));
    t_data.Query1.Next;
  end;
end;

procedure Tf_check.CancelClick(Sender: TObject);
begin
  inherited;
  Radio1.Checked := True;
  Picker1.DateTime := Now;
  Depot.ItemIndex := -1;
  Counter.ItemIndex := -1;
  Cleardetail;
  ClearGrid;
  Lose.Checked := True;
end;

procedure Tf_check.Cleardetail;
var
  i: Integer;
begin
  For i := 0 to Panel2.ControlCount-1 do
    if Panel2.Controls[i]is TEdit then
      TEdit(Panel2.Controls[i]).Clear;
end;

procedure Tf_check.ClearGrid;
var
  i,j: Integer;
begin
  For i := 1 to Grid.RowCount-2 do
    For j := 0 to Grid.ColCount-1 do
      Grid.Cells[j,i]:= '';
  Grid.RowCount := 2;
end;

procedure Tf_check.BarcodeKeyPress(Sender: TObject; var Key: Char);
begin
  inherited;
  if (Not (Key in ['0'..'9',#8]))or(Trim(Bookname.Text)<>'') then
    Key := #0;
end;

procedure Tf_check.BooknameKeyPress(Sender: TObject; var Key: Char);
begin
  inherited;
  if Trim(barcode.Text)<>'' then
    Key := #0;
end;

procedure Tf_check.SumKeyPress(Sender: TObject; var Key: Char);
begin
  inherited;
  if Not (Key in ['0'..'9','.',#8])then
    Key := #0
  else if (key = '.')and(Pos(Key,Trim(TEdit(Sender).Text))<>0) then
    Key := #0;
end;

procedure Tf_check.Panel1Enter(Sender: TObject);
begin
  inherited;
  Grid1.Visible := False;
end;

procedure Tf_check.BarcodeKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  inherited;
  if Key = vk_delete then
    Key := 0;
  if Key = vk_Return then
  begin
    if Sender is TEdit then
      if (Trim(Barcode.Text)<>'')and(Trim(Bookname.Text)='')and(TEdit(Sender).Name = 'Barcode') then
      begin
        With t_data.Query1 do
        begin
          Close;
          SQL.Clear;
          SQL.Add('select bookname,barcode,bookconcern,author from tb_bookinfo where barcode = :barcode');
          Parameters.ParamByName('barcode').Value := Trim(Barcode.Text);
          Open;
        end;
        if t_data.Query1.RecordCount>0 then
        begin
          Barcode.Text := Trim(t_data.Query1.FieldByName('barcode').AsString);
          Bookname.Text := Trim(t_data.Query1.FieldByName('bookname').AsString);
          Author.Text := Trim(t_data.Query1.FieldByName('Author').AsString);
        end
        else
          Application.MessageBox('该条形码不存在.','提示',64);
      end
      else if (TEdit(Sender).Name = 'Bookname')and(Trim(Bookname.Text)<>'')and(Trim(Barcode.Text)='') then
      begin
        With t_data.Query1 do
        begin
          Close;
          SQL.Clear;
          SQL.Add('select bookname,barcode,bookconcern,author from tb_bookinfo where Bookname = :name');
          Parameters.ParamByName('name').Value := Trim(Bookname.Text);
          Open;
        end;
        if t_data.Query1.RecordCount>0 then
        begin
          Barcode.Text := Trim(t_data.Query1.FieldByName('barcode').AsString);
          Bookname.Text := Trim(t_data.Query1.FieldByName('bookname').AsString);
          Author.Text := Trim(t_data.Query1.FieldByName('Author').AsString);
        end
        else
          Application.MessageBox('该书籍不存在.','提示',64);
      end;
    FindNext(True);
  end
  else if (Key = vk_control)and(Grid1.Visible = True) then
    Grid1.SetFocus
  else if (Key = vk_insert)and(DetailIsNull = False) then
  begin
    Grid.Cells[c_barcode,Grid.RowCount-1]:= Trim(Barcode.Text);
    Grid.Cells[c_bookname,Grid.RowCount-1]:= Trim(Bookname.Text);
    Grid.Cells[c_author,Grid.RowCount-1]:= Trim(Author.Text);
    Grid.Cells[c_sum,Grid.RowCount-1] := Trim(Sum.Text);
    Grid.RowCount := Grid.RowCount+1;
    ClearDetail;
    Barcode.SetFocus;
  end
  else if Key =vk_escape then
  begin
    ClearDetail;
  end;
end;

procedure Tf_check.Grid1DblClick(Sender: TObject);
begin
  inherited;
  Barcode.Text := Trim(Source1.DataSet.FieldByName('barcode').AsString);
  Bookname.Text := Trim(Source1.DataSet.FieldByName('bookname').AsString);
  Author.Text := Trim(Source1.DataSet.FieldByName('author').AsString);
  Grid1.Visible := False;
  Sum.SetFocus;
end;

procedure Tf_check.Grid1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  inherited;
  if Key = vk_Return then
    Grid1.OnDblClick(Sender);
end;

procedure Tf_check.GridKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var
  i,j: Integer;
begin
  inherited;
  if Key = vk_delete then
  begin
    if x <> Grid.RowCount-1 then //因为最后一行始终为空,不能够删除
    begin
      if Application.MessageBox('确实要删除当前行数据吗?','提示',mb_yesno)= ID_Yes then
      begin
        For i := x to Grid.RowCount-2 do
        begin
          For j := 0 to Grid.ColCount-1 do
            Grid.Cells[j,i]:= Grid.Cells[j,i+1];
        end;
        Grid.RowCount := Grid.RowCount-1;
      end;
    end;
  end
end;

function Tf_check.DetailIsNull: Boolean;
var
  i: Integer;
begin
  Result := False;
  For i := 0 to Panel2.ControlCount-1 do