basesearch.pas

用delphi编写的数据库管理软件

unit BaseSearch;

interface
                                              
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, MDIBase, FR_DSet, FR_DBSet, FR_Class, Menus, ActnList, DB,
  DBClient, Grids, DBGridEh, StdCtrls, ExtCtrls;

Const
  WM_USER_GETDATA = WM_USER+1024;
  WM_USER_SETFOOTER = WM_USER+8028;

type
  TfrmBaseSearch = class(TfrmMDIBase)
    Panel1: TPanel;
    FormTitle: TLabel;
    Panel3: TPanel;
    btnExit: TButton;
    Panel2: TPanel;
    btnadd: TButton;
    btncopy: TButton;
    btnedit: TButton;
    btndelete: TButton;
    Panel4: TPanel;
    btnrefresh: TButton;
    btnsearch: TButton;
    btnprint: TButton;
    grid: TDBGridEh;
    CDSBaseinfo: TClientDataSet;
    DSbaseinfo: TDataSource;
    ActionList1: TActionList;
    Action1: TAction;
    Action2: TAction;
    Action3: TAction;
    Action4: TAction;
    Action5: TAction;
    ppmreport: TPopupMenu;
    N1: TMenuItem;
    N2: TMenuItem;
    N3: TMenuItem;
    N4: TMenuItem;
    N5: TMenuItem;
    N6: TMenuItem;
    N7: TMenuItem;
    N8: TMenuItem;
    N9: TMenuItem;
    frBaseinfo: TfrReport;
    frDBDataSet1: TfrDBDataSet;
    ActionList2: TActionList;
    acrefresh: TAction;
    acsearch: TAction;
    acfieldproperty: TAction;
    acexit: TAction;
    popupgrid: TPopupMenu;
    N10: TMenuItem;
    N11: TMenuItem;
    N12: TMenuItem;
    N13: TMenuItem;
    N14: TMenuItem;
    N15: TMenuItem;
    N16: TMenuItem;
    N17: TMenuItem;
    N18: TMenuItem;
    N20: TMenuItem;
    N21: TMenuItem;
    acfirst: TAction;
    acprior: TAction;
    acnext: TAction;
    aclast: TAction;
    procedure acexitExecute(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure acfirstExecute(Sender: TObject);
    procedure acpriorExecute(Sender: TObject);
    procedure acnextExecute(Sender: TObject);
    procedure aclastExecute(Sender: TObject);
    procedure acrefreshExecute(Sender: TObject);
    procedure acsearchExecute(Sender: TObject);
    procedure btnprintClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure Action1Execute(Sender: TObject);
    procedure Action2Execute(Sender: TObject);
    procedure Action3Execute(Sender: TObject);
    procedure Action4Execute(Sender: TObject);
    procedure frBaseinfoUserFunction(const Name: String; p1, p2,
      p3: Variant; var Val: Variant);
    procedure acfieldpropertyExecute(Sender: TObject);
    procedure gridTitleBtnClick(Sender: TObject; ACol: Integer;
      Column: TColumnEh);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
    procedure gridDrawColumnCell(Sender: TObject; const Rect: TRect;
      DataCol: Integer; Column: TColumnEh; State: TGridDrawState);
  private
    procedure SetfieldDisplayFormat;
    procedure Getdata(var getdata:Tmessage);Message WM_USER_GETDATA;
    procedure setfooter(var setfooter:Tmessage);Message WM_USER_SETFOOTER;    
    { Private declarations }
  protected
    MainTable:string;
    KeyField:String;
    ReportName:string;
    function GetGridTitle(TableName:String):Boolean;    
  public
    { Public declarations }
  end;

var
  frmBaseSearch: TfrmBaseSearch;

implementation

uses Global, DataProcess, Bsearch, Binterface;

{$R *.dfm}

{ TfrmBaseSearch }

procedure TfrmBaseSearch.Getdata(var getdata: Tmessage);
var
  tiao:String;
begin
  tiao:=KeyField+'>='+vartosql(GetMaxid(Maintable,KeyField)-20);
  GetSqlData(CDSBaseinfo,MainTable,KeyField,tiao);
  GetGridTitle(MainTable);
  SetfieldDisplayFormat;
  postMessage(handle,WM_USER_SETFOOTER,0,0);
end;

function TfrmBaseSearch.GetGridTitle(TableName: String): Boolean;
var
  i:integer;
  TMPCDS:TclientDataset;
begin
Result:=True;
if TableName='' then
    Exit;
  try
    CDSbaseinfo.DisableControls;
    TMPCDS:=Tclientdataset.Create(nil);
    TMPCDS.FetchOnDemand:=False;
    GetsqlData(TMPCDS,'TTablefield','fid','ftableName='+vartosql(TableName),20);
    if TMPCDS.RecordCount > 0 then
      begin
        for i:=0 to CDSBaseinfo.Fields.Count - 1 do
          begin
           TMPCDS.First;
            while not TMPCDS.Eof do
              begin
                if UpperCase(CDSbaseinfo.fields[i].FieldName)=UpperCase(TMPCDS.FieldByName('fname').AsString) then
                  begin
                    CDSbaseinfo.Fields[i].DisplayLabel:=TMPCDS.fieldbyname('fdesc').AsString;
                    if (TMPCDS.FieldByName('ftype').AsString='int') or
                        (TMPCDS.FieldByName('ftype').AsString='bit') or
                        (TMPCDS.FieldByName('ftype').AsString='datetime') or
                        (TMPCDS.FieldByName('ftype').AsString='numeric') then
                        CDSbaseinfo.Fields[i].DisplayWidth := 8
                        else
                        CDSbaseinfo.Fields[i].DisplayWidth:=Trunc(TMPCDS.fieldbyname('flength').AsInteger/2);
                    if not TMPCDS.FieldByName('fisVisible').AsBoolean then
                      begin
                        CDSbaseinfo.Fields[i].Visible:=False;
                      end;
                  end;
                TMPCDS.Next;
              end;
            CDSBaseinfo.Next;
          end;
      end;
  finally
    TMPCDS.Close;
    TMPCDS.Free;
    CDSbaseinfo.EnableControls; 
  end;
end;

procedure TfrmBaseSearch.acexitExecute(Sender: TObject);
begin
  inherited;
  Close;
end;

procedure TfrmBaseSearch.FormDestroy(Sender: TObject);
begin
  inherited;
  frmBaseSearch:=nil;
end;

procedure TfrmBaseSearch.acfirstExecute(Sender: TObject);
begin
  inherited;
  CDSBaseinfo.First;
end;

procedure TfrmBaseSearch.acpriorExecute(Sender: TObject);
begin
  inherited;
  CDSbaseinfo.Prior; 
end;

procedure TfrmBaseSearch.acnextExecute(Sender: TObject);
begin
  inherited;
  CDSBaseinfo.Next; 
end;

procedure TfrmBaseSearch.aclastExecute(Sender: TObject);
begin
  inherited;
  CDSBaseinfo.Last; 
end;

procedure TfrmBaseSearch.acrefreshExecute(Sender: TObject);
begin
  inherited;
  GetsqlData(CDSbaseinfo,Maintable,Keyfield,KeyField+'>='+vartosql(GetMaxid(Maintable,KeyField)-20));
  GetGridTitle(MainTable);
  SetfieldDisplayFormat;
  postMessage(handle,WM_USER_SETFOOTER,0,0);
end;

procedure TfrmBaseSearch.acsearchExecute(Sender: TObject);
begin
  inherited;
  searchtiao:='';
  FromInterface:=Maintable;
  if not assigned(frmSearch) then
    FrmSearch:=TfrmSearch.Create(Application);
    FrmSearch.showModal;
    frmSearch.free;

  if Searchtiao<>'' then
    try
      Getsqldata(CDSBaseinfo,Maintable,Keyfield,Searchtiao,20);
      GetGridTitle(MainTable);
      SetfieldDisplayFormat;
      postMessage(handle,WM_USER_SETFOOTER,0,0);
    except
      on E:Exception do
        begin
          messagedlg('查找失败 ! '+#10#13+E.Message,mtError,[mbok],0);
          postmessage(handle,WM_USER_GETDATA,0,0);
          application.ProcessMessages;
          Exit;
        end;
    end;
end;

procedure TfrmBaseSearch.btnprintClick(Sender: TObject);
var
  Point:Tpoint;
begin
  inherited;
  Point:=GetScreenPoint(btnprint);
  ppmreport.Popup(point.X,point.Y);
end;

procedure TfrmBaseSearch.FormShow(Sender: TObject);
begin
  inherited;
  FormTitle.Caption:=self.Caption;
  postmessage(handle,WM_USER_GETDATA,0,0);
  application.ProcessMessages;
end;

procedure TfrmBaseSearch.Action1Execute(Sender: TObject);
begin
  inherited;
  if CDSbaseinfo.RecordCount = 0 then
    Exit;
  try
    CDSbaseinfo.DisableControls;
    frbaseinfo.LoadFromFile(GetLogDir('Prints')+ReportName);
    frbaseinfo.ShowReport;
    CDSbaseinfo.EnableControls;
  except
    on E:Exception do
      begin
        messagedlg('预览失败 ! '+#10#13+E.Message,mtError,[MBOK],0);
        Exit;
      end;
  end;
end;

procedure TfrmBaseSearch.Action2Execute(Sender: TObject);
begin
  inherited;
  if CDSbaseinfo.RecordCount = 0 then
    Exit;
  try
    CDSbaseinfo.DisableControls;
    frbaseinfo.LoadFromFile(GetLogDir('Prints')+ReportName);
    frbaseinfo.PrepareReport;
    frbaseinfo.PrintPreparedReport('',1,True,frAll);
    CDSbaseinfo.EnableControls;
  except
    on E:Exception do
      begin
        messagedlg('打印失败 !'+#10#13+E.Message,mtError,[MBOK],0);
        Exit;
      end;
  end;
end;

procedure TfrmBaseSearch.Action3Execute(Sender: TObject);
begin
  inherited;
  if CDSbaseinfo.RecordCount = 0 then
    Exit;
  try
    CDSbaseinfo.DisableControls;
    frbaseinfo.LoadFromFile(GetLogDir('Prints')+ReportName);
    frbaseinfo.PrepareReport;
    frbaseinfo.PrintPreparedReportDlg;
    CDSbaseinfo.EnableControls;
  except
    on E:Exception do
      begin
        messagedlg('打印设置失败 ! '+#10#13+E.Message,mtError,[MBOK],0);
        Exit;
      end;
  end;
end;

procedure TfrmBaseSearch.Action4Execute(Sender: TObject);
begin
  inherited;
  if CDSbaseinfo.RecordCount = 0 then
    Exit;
  try
    CDSbaseinfo.DisableControls;
    frbaseinfo.LoadFromFile(GetLogDir('Prints')+ReportName);
    frbaseinfo.DesignReport;
    CDSbaseinfo.EnableControls;
  except
    on E:Exception do
      begin
        messagedlg('报表设置失败 ! '+#10#13+E.Message,mtError,[MBOK],0);
        Exit;
      end;
  end;
end;

procedure TfrmBaseSearch.frBaseinfoUserFunction(const Name: String; p1, p2,
  p3: Variant; var Val: Variant);
begin
  inherited;
  if AnsicompareText('SRTIME',name)=0 then
    Val:=SRNow();
end;

procedure TfrmBaseSearch.acfieldpropertyExecute(Sender: TObject);
begin
  inherited;
  FromInterface:=MainTable;
  if not assigned(frmInterface) then
      frmInterface:=Tfrminterface.Create(application);
      frminterface.ShowModal;
      frminterface.Free;
  postmessage(handle,WM_USER_GETDATA,0,0);
  application.ProcessMessages;
end;

procedure TfrmBaseSearch.gridTitleBtnClick(Sender: TObject; ACol: Integer;
  Column: TColumnEh);
var
  sortstring:string;
begin
  inherited;
  with Column do
  begin
    if FieldName = '' then
      Exit;
    case Title.SortMarker of
      smNoneEh:
      begin
        Title.SortMarker := smDownEh;
        sortstring := Column.FieldName + ' ASC';
      end;
      smDownEh: sortstring := Column.FieldName + ' ASC';
      smUpEh: sortstring := Column.FieldName + ' DESC';
    end;

    try
      CDSBaseinfo.IndexFieldNames:= sortstring
    except
    end;
  end;
end;

procedure TfrmBaseSearch.FormCloseQuery(Sender: TObject;
  var CanClose: Boolean);
begin
  inherited;
  Grid.SumList.Active:=False;
end;

procedure TfrmBaseSearch.gridDrawColumnCell(Sender: TObject;
  const Rect: TRect; DataCol: Integer; Column: TColumnEh;
  State: TGridDrawState);
begin
  inherited;
  if CDSBaseinfo.RecNo  mod 2 = 0 then
    begin
      Grid.Canvas.Brush.Color:=$00EAEFED;
      Grid.Canvas.Font.Color:=clBlack;
    end
    else
    begin
      Grid.Canvas.Brush.Color:=clWhite;
      Grid.Canvas.Font.Color:=clBlack;
    end;
  if gdselected in state then
    begin
      grid.Canvas.Brush.Color:=clBackground;
      grid.Canvas.Font.Color:=clwhite;
    end;
  grid.DefaultDrawColumnCell(Rect,DataCol,Column,State);
end;

procedure TfrmBaseSearch.setfooter(var setfooter: Tmessage);
var
  i,j:integer;
begin
  i:=Grid.Columns.Count;
  if i>0 then
    begin
      for j:=0 to i-1 do
        begin
          Grid.Columns[0].Footer.ValueType:=fvtStaticText;
          Grid.Columns[0].Footer.Value:='合计';
          Grid.Columns[1].Footer.ValueType:=fvtCount;
          if (Grid.Fields[j] is TNumericField) and (not (Grid.Fields[j] is TIntegerField)) then
          begin
            Grid.Columns[j].Footer.ValueType:=fvtSum;
          end;
        end;
    end;
  application.ProcessMessages;
end;

procedure TfrmBaseSearch.SetfieldDisplayFormat;
var
  i:integer;
begin
  for i:=0 to CDSBaseinfo.FieldCount - 1 do
    begin
    if (CDSBaseinfo.Fields[i] is TNumericField) and (not (CDSBaseinfo.Fields[i] is TIntegerField)) then
      (CDSBaseinfo.Fields[i] as TNumericField).DisplayFormat := '###,##0.00';
    if (CDSBaseinfo.Fields[i] is TFloatField) then
      (CDSBaseinfo.Fields[i] as TFloatField).DisplayFormat := '###,##0.00';
    if (CDSBaseinfo.Fields[i] is TCurrencyField) then
      (CDSBaseinfo.Fields[i] as TCurrencyField).DisplayFormat := '￥###,##0.00';

    end;
end;

end.