unit uBookReg;

{$WARN SYMBOL_PLATFORM OFF}

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ComServ, ComObj, VCLCom, StdVcl, bdemts, DataBkr, DBClient,
  MtsRdm, Mtx, pBookReg_TLB, Provider, DB, ADODB, uPublic;

type
  TxzBooksBookReg = class(TMtsDataModule, IxzBooksBookReg)
    ADOConnection1: TADOConnection;
    ADODataSet1: TADODataSet;
    adoBookIsActive: TADODataSet;
    dspBookIsActive: TDataSetProvider;
  private
    function BookIDISActived(BookID:String):Boolean;
    { Private declarations }
  protected
    class procedure UpdateRegistry(Register: Boolean; const ClassID, ProgID: string); override;
    procedure CBook(const ID, Name, Author, Pub: WideString; Money: Single;
      const RKRQ: WideString; CS: Integer; var vResult: OleVariant);
      safecall;
  public
    { Public declarations }
  end;

var
  xzBooksBookReg: TxzBooksBookReg;

implementation

{$R *.DFM}

class procedure TxzBooksBookReg.UpdateRegistry(Register: Boolean; const ClassID, ProgID: string);
begin
  if Register then
  begin
    inherited UpdateRegistry(Register, ClassID, ProgID);
    EnableSocketTransport(ClassID);
    EnableWebTransport(ClassID);
  end else
  begin
    DisableSocketTransport(ClassID);
    DisableWebTransport(ClassID);
    inherited UpdateRegistry(Register, ClassID, ProgID);
  end;
end;

//BookID是否已經存在；.T.不存在，.F.存在了，返回這本圖書的詳細信息
function TxzBooksBookReg.BookIDISActived(BookID: String): Boolean;
begin
  try
    if ADOConnection1.Connected then
      ADOCOnnection1.Connected :=False;
    ADOConnection1.ConnectionString :=GetConStr;
    adoBookIsActive.Close;
    adoBookIsActive.Parameters.ParamByName('aid').Value :=BookID;
    adoBookIsActive.Open;
    Result:=adoBookIsActive.IsEmpty;
  finally
    adoBookIsActive.Close;
  end;
end;

procedure TxzBooksBookReg.CBook(const ID, Name, Author, Pub: WideString;
  Money: Single; const RKRQ: WideString; CS: Integer;
  var vResult: OleVariant);
begin
  if BookIDISActived(ID) then
    try
      ADODataSet1.Open;
      ADODataSet1.Append;
      ADODataSet1.FieldByName('ID').Value :=ID;
      ADODataSet1.FieldByName('CS').Value :=CS;
      ADODataSet1.FieldByName('Name').Value :=Name;
      ADODataSet1.FieldByName('Author').Value :=Author;
      ADODataSet1.FieldByName('Pub').Value :=Pub;
      ADODataSet1.FieldByName('Money').Value :=Money;
      ADODataSet1.FieldByName('RKRQ').Value :=strtoDate(RKRQ);
      ADODataSet1.Post;
      setComplete;
      vResult:='Complete';
    except
      setAbort;
      vResult:=ADOConnection1.Errors[0].Description;
    end
  else
    begin
      adoBookIsActive.Close;
      adoBookIsActive.Parameters.ParamByName('aid').Value :=ID;
      adoBookIsActive.Open;
      vResult:=dspBookIsActive.Data;
    end;
end;

initialization
  TComponentFactory.Create(ComServer, TxzBooksBookReg,
    Class_xzBooksBookReg, ciMultiInstance, tmApartment);
end.