DELPHI的一些开发技巧和方法(二)

  作者 : toofree
  
  
   标题 : DELPHI的一些开发技巧和方法(二)
  
  
   关键字: DELPHI 开发技巧
  
  
   分类 : 开发技巧
  
  
   密级 : 参赛
  
  
  
  
  
  
   (评分:★ , 回复: 3, 阅读: 1185)
  11、向其他应用程序发送模拟键:
  var
  h: Thandle;
  begin
  h := FindWindow(nil, '应用程序标题');
  PostMessage(h, WM_KEYDOWN, VK_F9, 0);//发送F9键
  end
  12、判断当前网络连接方式:
  (判断结果为MODEM、局域网或是代理服务器方式)
  uses wininet;
  Function ConnectionKind :boolean;
  var flags: dword;
  begin
  Result := InternetGetConnectedState(@flags, 0);
  if Result then
  begin
  if (flags and INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM then
  begin
  showmessage('Modem');
  end;
  if (flags and INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN then
  begin
  showmessage('LAN');
  end;
  if (flags and INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY then
  begin
  showmessage('Proxy');
  end;
  if (flags and INTERNET_CONNECTION_MODEM_BUSY)=INTERNET_CONNECTION_MODEM_BUSY then
  begin
  showmessage('Modem Busy');
  end;
  end;
  end;
  13、取机器BIOS信息:
  with Memo1.Lines do
  begin
  Add('MainBoardBiosName:'+^I+string(Pchar(Ptr($FE061))));
  Add('MainBoardBiosCopyRight:'+^I+string(Pchar(Ptr($FE091))));
  Add('MainBoardBiosDate:'+^I+string(Pchar(Ptr($FFFF5))));
  Add('MainBoardBiosSerialNo:'+^I+string(Pchar(Ptr($FEC71))));
  end;
  14、解析服务器IP地址:
  uses winsock
  function IPAddrToName(IPAddr : String): String;
  var
  SockAddrIn: TSockAddrIn;
  HostEnt: PHostEnt;
  WSAData: TWSAData;
  begin
  WSAStartup($101, WSAData);
  SockAddrIn.sin_addr.s_addr:= inet_addr(Pchar(IPAddr));
  HostEnt:= gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET);
  if HostEnt<>nil then result:=StrPas(Hostent^.h_name) else result:='';
  end;
  15、清空一个目录:
  function EmptyDirectory(TheDirectory :String ; Recursive : Boolean) :
  Boolean;
  var
  SearchRec : TSearchRec;
  Res : Integer;
  begin
  Result := False;
  TheDirectory := NormalDir(TheDirectory);
  Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec);
  try
  while Res = 0 do
  begin
  if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then
  begin
  if ((SearchRec.Attr and faDirectory) > 0) and Recursive
  then begin
  EmptyDirectory(TheDirectory + SearchRec.Name, True);
  RemoveDirectory(Pchar(TheDirectory + SearchRec.Name));
  end
  else begin
  DeleteFile(Pchar(TheDirectory + SearchRec.Name))
  end;
  end;
  Res := FindNext(SearchRec);
  end;
  Result := True;
  finally
  FindClose(SearchRec.FindHandle);
  end;
  end;
  16、计算目录的大小:
  function GetDirectorySize(const Adirectory: string): Integer;
  var
  Dir: TSearchRec;
  Ret: integer;
  Path: string;
  begin
  Result := 0;
  Path := ExtractFilePath(Adirectory);
  Ret := Sysutils.FindFirst(Adirectory, faAnyFile, Dir);
  if Ret <> NO_ERROR then exit;
  try
  while ret=NO_ERROR do
  begin
  inc(Result, Dir.Size);
  if (Dir.Attr in [faDirectory]) and (Dir.Name[1] <> '.') then
  Inc(Result, GetDirectorySize(Path + Dir.Name + '\*.*'));
  Ret := Sysutils.FindNext(Dir);
  end;
  finally
  Sysutils.FindClose(Dir);
  end;
  end;
  17、获得硬盘序列号:
  var SerialNum : pdword; a, b : dword; Buffer : array [0..255] of char;
  begin
  if GetVolumeInformation('c:\', Buffer, SizeOf(Buffer), SerialNum, a, b, nil, 0) then Label1.Caption := IntToStr(SerialNum^);
  end;
  18、目录完全删除:
  procedure Tform1.DeleteDirectory(strDir:String);
  var
  sr: TSearchRec;
  FileAttrs: Integer;
  strfilename:string;
  strPth:string;
  begin
  strpth:=Getcurrentdir();
  FileAttrs := faAnyFile;
  if FindFirst(strpth+'\'+strdir+'\*.*', FileAttrs, sr) = 0 then
  begin
  if (sr.Attr and FileAttrs) = sr.Attr then
  begin
  strfilename:=sr.Name;
  if fileexists(strpth+'\'+strdir+'\'+strfilename) then
  deletefile(strpth+'\'+strdir+'\'+strfilename);
  end;
  while FindNext(sr) = 0 do
  begin
  if (sr.Attr and FileAttrs) = sr.Attr then
  begin
  strfilename:=sr.name;
  if fileexists(strpth+'\'+strdir+'\'+strfilename) then
  deletefile(strpth+'\'+strdir+'\'+strfilename);
  end;
  end;
  FindClose(sr);
  removedir(strpth+'\'+strdir);
  end;
  end;
  19、TFileStream的操作:
  //从文件流当前位置读count字节到缓冲区BUFFER
  function read(var buffer;count:longint):longint;override;
  //将缓冲区BUFFER读到文件流中
  function write(const buffer;count:longint):longint;override;
  //设置文件流当前读写指针为OFFSET
  function seek(offset:longint;origin:word):longint;override;
  origin={soFromBeginning,soFromCurrent,soFromEnd}
  //从另一文件流中当前位置复制COUNT到当前文件流当前位置
  function copyfrom(source:Tstream;count:longint):longint;
  //读指定文件到文件流
  var myFStream:TFileStream;
  begin
  myFStream:=TFileStream.create(OpenDialog1.filename,fmOpenRead);
  end;
  20、获得CPU序列号:
  function GetCpuId:longint;assembler;register;
  var
  temp:longint;
  begin
  asm
   PUSH EBX
   PUSH EDI
   MOV EDI,EAX
   MOV EAX,1
   DW $A20F
   MOV TEMP,EDX
   POP EDI
   POP EBX
  end;
  result:=temp;
  end;
  procedure TForm1.Button1Click(Sender: Tobject);
  begin
   label1.Caption:=IntToHex(GetCpuId,8);
  end;
  2003-5-30 10:47:00