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openfile.cpp
Package: shell.rar　[view]
Upload User: xhy777
Upload Date: 2007-02-14
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Code Size: 3k
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Windows Kernel

Development Platform:

Visual C++

openfile.cpp：Code Content
  1. //+-------------------------------------------------------------------------
  2. //
  3. //  Microsoft Windows
  4. //
  5. //  Copyright (C) Microsoft Corporation, 1997 - 1999
  6. //
  7. //  File:       openfile.cpp
  8. //
  9. //--------------------------------------------------------------------------
  11. #include "pch.h"
  12. #pragma hdrstop
  14. #include "pathstr.h"
  16. //
  17. // Open a file using ShellExecuteEx and the "open" verb.
  18. //
  19. DWORD
  20. OpenOfflineFile(
  21.     LPCTSTR pszFile
  22.     )
  23. {
  24.     DWORD dwErr = ERROR_SUCCESS;
  26.     CPath strFullPath(pszFile);
  27.     if (!strFullPath.IsEmpty())
  28.     {
  29.         //
  30.         // Have CSC create a local copy.  It creates the file with a 
  31.         // unique (and cryptic) name.
  32.         //
  33.         LPTSTR pszCscLocalName = NULL;
  34.         if (!CSCCopyReplica(strFullPath, &pszCscLocalName))
  35.         {
  36.             dwErr = GetLastError();
  37.         }
  38.         else
  39.         {
  40.             DBGASSERT((NULL != pszCscLocalName));
  41.             //
  42.             // Combine the temporary path and the original filespec to form
  43.             // a name that will be meaningful to the user when the file is opened
  44.             // in it's application.
  45.             //
  46.             CPath strCscTempName(pszCscLocalName);
  47.             strCscTempName.RemoveFileSpec();
  48.             strFullPath.SetPath(strCscTempName);
  49.             //
  50.             // Remove any read-only attribute in case there's still a copy left
  51.             // from a previous "open" operation.  We'll need to overwrite the
  52.             // existing copy.
  53.             //
  54.             DWORD dwAttrib = GetFileAttributes(strFullPath);
  55.             if ((DWORD)-1 != dwAttrib)
  56.             {
  57.                 SetFileAttributes(strFullPath, dwAttrib & ~FILE_ATTRIBUTE_READONLY);
  58.             }
  59.             //
  60.             // Rename the file to use the proper name.
  61.             //
  62.             if (!MoveFileEx(pszCscLocalName, strFullPath, MOVEFILE_REPLACE_EXISTING))
  63.             {
  64.                 dwErr = GetLastError();
  65.             }
  66.             else
  67.             {
  68.                 //
  69.                 // Set the file's READONLY bit so that the user can't save 
  70.                 // changes to the file.  They can, however, save it somewhere
  71.                 // else from within the opening app if they want.
  72.                 //
  73.                 dwAttrib = GetFileAttributes(strFullPath);
  74.                 if (!SetFileAttributes(strFullPath, dwAttrib | FILE_ATTRIBUTE_READONLY))
  75.                 {
  76.                     dwErr = GetLastError();
  77.                 }
  78.             }
  79.             LocalFree(pszCscLocalName);
  80.         }
  81.         //
  82.         // If after all that... we don't have an error,  then we
  83.         // can try to open it.
  84.         //
  85.         if (ERROR_SUCCESS == dwErr)
  86.         {
  87.             SHELLEXECUTEINFO si;
  88.             ZeroMemory(&si, sizeof(si));
  89.             si.cbSize       = sizeof(si);
  90.             si.fMask        = SEE_MASK_FLAG_NO_UI;
  91.             si.hwnd         = NULL;
  92.             si.lpFile       = strFullPath;
  93.             si.lpVerb       = NULL;         // default to "Open".
  94.             si.lpParameters = NULL;
  95.             si.lpDirectory  = NULL;
  96.             si.nShow        = SW_NORMAL;
  98.             if (!ShellExecuteEx(&si))
  99.             {
  100.                 dwErr = GetLastError();
  101.             }
  102.         }
  103.     }
  104.     return dwErr;
  105. }