unit U_Link;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  IniFiles, Dialogs, ScktComp, ExtCtrls;

type
  TCommBlock = record
    workFlag: integer;    //0:开始接受字符串，
    linkString: string[255];
               //  buf:array [0..Buffersize] of char;
  end;

  TfrmLink = class(TForm)
    CSocket: TClientSocket;
    AADs: TPanel;
    procedure CSocketRead(Sender: TObject; Socket: TCustomWinSocket);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure CSocketConnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure FormDestroy(Sender: TObject);
    procedure CSocketError(Sender: TObject; Socket: TCustomWinSocket; ErrorEvent: TErrorEvent; var ErrorCode: Integer);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    fADOConnString: string;
    LinkFlag: string;
    function LinkTxServer(): Boolean;

    { Public declarations }
  end;

var
  frmLink: TfrmLink;

implementation
//uses U_Main;
{$R *.dfm}

function TfrmLink.LinkTxServer(): Boolean;
var
  CommBlock: TCommBlock;
begin
  result := false;
  try
    CommBlock.workFlag := strtointdef(LinkFlag, -1);
    CommBlock.linkString := '';
    CSocket.Socket.SendBuf(CommBlock, SizeOf(CommBlock));
    Result := true;
  except
    Application.MessageBox('连接通讯服务器失败！', '错误信息', MB_ICONERROR);
  end;
end;

procedure TfrmLink.CSocketRead(Sender: TObject; Socket: TCustomWinSocket);
var
  CommBlock1: TCommBlock;
begin
  try
    CSocket.Socket.ReceiveBuf(CommBlock1, SizeOf(CommBlock1));
//    fADOConnString := trim(CommBlock1.linkString);
    fADOConnString :='Provider=SQLOLEDB.1;Password=rightsoft@123;Persist Security Info=True;User ID=haoyuesa;Initial Catalog=leixiaofudata;Data Source=47.101.61.158,7781' ;
    ModalResult := 1;
  except
    ModalResult := -1;
  end;
end;

procedure TfrmLink.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  Action := cahide;
end;

procedure TfrmLink.CSocketConnect(Sender: TObject; Socket: TCustomWinSocket);
begin
  if not LinkTxServer() then
    ModalResult := -1;
end;

procedure TfrmLink.FormDestroy(Sender: TObject);
begin
  frmLink := nil;
end;

procedure TfrmLink.CSocketError(Sender: TObject; Socket: TCustomWinSocket; ErrorEvent: TErrorEvent; var ErrorCode: Integer);
begin
  Application.MessageBox('连接通讯服务器失败！', '错误信息', MB_ICONERROR);
  application.Terminate;
end;

procedure TfrmLink.FormCreate(Sender: TObject);
var
  IniFile: TIniFile;
  LinkServer: string;
begin
  try
    IniFile := TIniFile.Create(ExtractFilePath(Application.ExeName) + 'SYSTEMSET.INI');
    LinkServer := IniFile.ReadString('SERVER', '服务器地址','127.0.0.1');
//    LinkServer := '47.101.61.158';
    LinkFlag := IniFile.ReadString('SERVER', '服务器地址类型', '0');
  finally
    IniFile.Free;
  end;

  try
    CSocket.Host := trim(LinkServer);
    CSocket.Port := 47936;
    CSocket.Open;
  except
    ModalResult := -1;
  end;

end;

end.