twebbrowser 问题

Question

   如果在delphi中实现 使用twebbrowser 不读缓存，而是直接从网页上下载啊
急！！！

Answer 1

unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;var
  Form1: TForm1;implementation{$R *.dfm}
uses WinINet;procedure ClearTempInternetFiles(RemCookies: boolean);
var
  lpEntryInfo: PInternetCacheEntryInfo;
  hCacheDir: LongWord (*Handle*);
  dwEntrySize, dwLastError: LongWord;
begin
  //Get size of first entry in dwEntrySize
  dwEntrySize := 0;
  FindFirstUrlCacheEntry(nil, TInternetCacheEntryInfo(nil^), dwEntrySize);  //Create structure that can hold entry
  GetMem(lpEntryInfo, dwEntrySize);
  try
    //Get first cache entry and handle to retrieve next entry, output url
    hCacheDir := FindFirstUrlCacheEntry(nil, lpEntryInfo^, dwEntrySize);
    if hCacheDir = 0 then
      exit;    if (hCacheDir <> 0) and
       ((lpEntryInfo^.CacheEntryType and NORMAL_CACHE_ENTRY) = NORMAL_CACHE_ENTRY) then
    begin
      if ((lpEntryInfo^.CacheEntryType and COOKIE_CACHE_ENTRY) = 0) or RemCookies then
      begin
        if FileExists(string(lpEntryInfo^.lpszLocalFileName)) then
          DeleteFile(string(lpEntryInfo^.lpszLocalFileName)); //delete file        DeleteUrlCacheEntry(lpEntryInfo^.lpszSourceUrlName);
      end;
    end;
  finally
    //free structure
    FreeMem(lpEntryInfo);
  end;  //retrieve all subsequent entries
  repeat
    dwEntrySize := 0;
    FindNextUrlCacheEntry(hCacheDir, TInternetCacheEntryInfo(nil^), dwEntrySize);
    dwLastError := GetLastError();    if dwLastError = ERROR_INSUFFICIENT_BUFFER then begin
      GetMem(lpEntryInfo, dwEntrySize);
      try
        if FindNextUrlCacheEntry(hCacheDir, lpEntryInfo^, dwEntrySize) then begin
          if ((lpEntryInfo^.CacheEntryType and NORMAL_CACHE_ENTRY) = NORMAL_CACHE_ENTRY) then
          begin
            if ((lpEntryInfo^.CacheEntryType and COOKIE_CACHE_ENTRY) = 0) or RemCookies then
            begin
              if FileExists(string(lpEntryInfo^.lpszLocalFileName)) then
                DeleteFile(string(lpEntryInfo^.lpszLocalFileName)); //delete file              DeleteUrlCacheEntry(lpEntryInfo^.lpszSourceUrlName);
            end;
          end;
        end else
          exit;
      finally
        FreeMem(lpEntryInfo);
      end;
    end else
      exit;
  until dwLastError = ERROR_NO_MORE_ITEMS;
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  Screen.Cursor := crHourGlass;
  try
    ClearTempInternetFiles(true);
  finally
    Screen.Cursor := crDefault;
  end;
end;end.