needplan.pas

1. 直接安装并运行案例程序 运行“安装程序”文件夹中的setup.exe文件

unit needPlan;

interface

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

type
  TfrmNeedPlan = class(TForm)
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    Query1: TQuery;
    GroupBox1: TGroupBox;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button6: TButton;
    Table1: TTable;
    Table2: TTable;
    bmName: TComboBox;
    wzName: TComboBox;
    bmId: TEdit;
    wzId: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    num: TEdit;
    Table3: TTable;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure bmNameSelect(Sender: TObject);
    procedure wzNameSelect(Sender: TObject);
    procedure numExit(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
    procedure refreshDbGrid;
  public
    { Public declarations }
  end;

var
  frmNeedPlan: TfrmNeedPlan;

implementation

{$R *.dfm}
uses comFunc;
procedure TfrmNeedPlan.Button1Click(Sender: TObject);
begin
{检查需求数量是否合理}
   if num.Text='' then
   begin
      showMessage('需求数量不能为空！');
      activeControl:=num;
      exit;
   end;
{对需求计划表进行修改}
   with table3 do
   begin
      open;
      while not eof do
      begin
         if (bmId.Text=fieldByName('需求部门编号').AsString) and
            (wzId.Text=fieldByName('需求物资编号').AsString) then
         begin
            edit;
            fieldValues['需求数量']:=num.Text;
            post;
            showMessage('修改数据成功！');
            refreshDbGrid;
            close;
            exit;
         end;
         next;
      end;//end of while
      close;
      showMessage('需求计划中没有所对应的项！');
   end;//end of with
end;

procedure TfrmNeedPlan.FormCreate(Sender: TObject);
begin
{初始化部门名称和部门编号}
   with table1 do
   begin
      open;
      while not eof do
      begin
         bmName.Items.Add(fieldByName('部门名称').AsString);
         next;
      end;
      bmName.ItemIndex:=0;
      First;
      bmId.Text:=fieldByName('部门编号').AsString;
      close;
   end;//end of with
{初始化物资名称和物资编号}
   with table2 do
   begin
      open;
      while not eof do
      begin
         wzName.Items.Add(fieldByName('物资名称').AsString);
         next;
      end;
      wzName.ItemIndex:=0;
      first;
      wzId.Text:=fieldByName('物资编号').AsString;
      close;
   end;//end of with
end;

procedure TfrmNeedPlan.bmNameSelect(Sender: TObject);
begin
{根据用户选择不同的部门名称，相应的部门编号也跟着发生变化}
   with table1 do
   begin
      open;
      while not eof do
      begin
         if bmName.Items[bmName.ItemIndex]=
            fieldByName('部门名称').AsString then
         begin
            bmId.Text:=fieldByName('部门编号').AsString;
            break;
         end;//end of if
         next;
      end;
      close;
   end;//end of with
end;

procedure TfrmNeedPlan.wzNameSelect(Sender: TObject);
begin
{根据用户选择不同的物资名称，相应的物资编号也跟着发生变化}
   with table2 do
   begin
      open;
      while not eof do
      begin
         if wzName.Items[wzName.ItemIndex]=
            fieldByName('物资名称').AsString then
         begin
            wzId.Text:=fieldByName('物资编号').AsString;
            break;
         end;//end of if
         next;
      end;
      close;
   end;//end of with
end;

procedure TfrmNeedPlan.numExit(Sender: TObject);
begin
   if (isInteger(num.Text)=false) and
      (num.Text<>'') then
   begin
      showMessage('输入的需求数量错误！');
      activeControl:=num;
      exit;
   end;
end;

procedure TfrmNeedPlan.refreshDbGrid;
{更新DBGrid1控件，让显示和数据集达到一致}
begin
   with query1 do
   begin
      close;
      sql.Clear;
      sql.Add('select c.需求部门编号,a.部门名称,c.需求物资编号,b.物资名称,c.需求数量');
      sql.Add('from bminfo as a,wzinfo as b,need_plan as c where');
      sql.Add('a.部门编号=c.需求部门编号 and b.物资编号=c.需求物资编号');
      open;
   end;
end;

procedure TfrmNeedPlan.Button2Click(Sender: TObject);
begin
{检查需求数量是否合理}
   if num.Text='' then
   begin
      showMessage('需求数量不能为空！');
      activeControl:=num;
      exit;
   end;
{对需求计划表进行插入}
   with table3 do
   begin
      open;
      insert;
      fieldValues['需求部门编号']:=bmId.Text;
      fieldValues['需求物资编号']:=wzId.Text;
      fieldValues['需求数量']:=num.Text;
      post;
      close;
      showMessage('添加需求计划成功！');
      refreshDbGrid;
   end;//end of with
end;

procedure TfrmNeedPlan.Button3Click(Sender: TObject);
var
   rt:integer;
begin
   with table3 do
   begin
      open;
      while not eof do
      begin
         if (fieldByName('需求部门编号').AsString=bmId.Text) and
            (fieldByName('需求物资编号').AsString=wzId.Text) then
         begin
         {询问用户是否要真的删除记录}
            rt:=messageDlg('是否真的要删除？',mtConfirmation,
            [mbYes,mbNo],0);
            if rt=mrYes then
            begin
               delete;
               close;
               refreshDbGrid;
               exit;
            end
            else
            begin
               close;
               exit;
            end;
         end;
         next;
      end;
      close;
      showMessage('没有找到要删除的需求计划！');
   end;//end of with
end;

end.