unit U_DataLink;

interface

uses
  SysUtils, Classes, DB, ADODB, ImgList, Controls, cxStyles, cxLookAndFeels,
  Windows, Messages, forms, OleCtnrs, DateUtils, ExtCtrls, SyncObjs, cxClasses,
   System.ImageList,U_BaseDataLink,
  dxCore, cxLocalization, dxLayoutLookAndFeels, cxImageList, cxGraphics, cxEdit,
   dxSkinsForm, cxContainer;

type
  TMyThread = class(TThread)
  protected
    procedure Execute; override;
  end;

var
  DConString: string;   {全局连接字符串}
  server, dtbase, user, pswd: string;  {数据库连接参数}
  DCurHandle: hwnd;     //当前窗体句柄
  DName: string;   //#用户名#//
  DCode: string;     //#用户编号#//
  Ddatabase: string;    //#数据库名称#//
  DTitCaption: string;  //#主窗体名称#//
  PicSvr: string;
  fDllFileName: string;
  DParameters1, DParameters2, DParameters3, DParameters4, DParameters5: string; // 外部参数；
  DParameters6, DParameters7, DParameters8, DParameters9, DParameters10: string; //外部参数；
  OldDllApp: Tapplication; //保存原有句柄
  NewDllApp: Tapplication; //当前句柄
  MainApplication: Tapplication;
  DFormCode: integer;  //当前窗口号
  IsDelphiLanguage: integer;
  DServerDate: TdateTime; //服务器时间
  DCompany: string;       //公司
  IpCall: Integer;
  IpWLDZStr: string;
  UserDataFlag: string;

type
  TDataLink_TradePlan = class(TBaseDataLink)
    AdoDataLink: TADOQuery;
    ADOLink: TADOConnection;
    Timer_link: TTimer;
    ImageList_new32: TImageList;
    procedure DataModuleDestroy(Sender: TObject);
    procedure Timer_linkTimer(Sender: TObject);
    procedure DataModuleCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  TMakebar = procedure(ucData: pchar; nDataLen: integer; nErrLevel: integer; nMask: integer; nBarEdition: integer; szBmpFileName: pchar; nScale: integer); stdcall;

  TMixtext = procedure(szSrcBmpFileName: PChar; szDstBmpFileName: PChar; sztext: PChar; fontsize, txtheight, hmargin, vmargin, txtcntoneline: integer); stdcall;

var
  DataLink_TradePlan: TDataLink_TradePlan;
  CriticalSection: TCriticalSection; {声明临界}

implementation
{$R *.dfm}

procedure TMyThread.Execute;
begin
  FreeOnTerminate := True;
  CriticalSection.Enter;
  try
    with DataLink_TradePlan.AdoDataLink do
    begin
      close;
      sql.Clear;
      sql.Add('select getdate()');
      open;
    end;
  except
    try
      with DataLink_TradePlan.ADOLink do
      begin
        Connected := false;
        ConnectionString := DConString;
        LoginPrompt := false;
        Connected := true;
      end;
    except

    end;
  end;
  CriticalSection.Leave;
end;

procedure TDataLink_TradePlan.DataModuleDestroy(Sender: TObject);
begin
  CriticalSection.Free;
  DataLink_TradePlan := nil;
end;

procedure TDataLink_TradePlan.Timer_linkTimer(Sender: TObject);
begin
  TMyThread.Create(False);

end;

procedure TDataLink_TradePlan.DataModuleCreate(Sender: TObject);
begin
  inherited;
  CriticalSection := TCriticalSection.Create;
    try
        with ADOLink do
        begin

           ConnectionString := DConString;
           open ;
       end;

    except

    end;
end;

end.