一个文件追加到另一个文件上（Windows CE 5.0 版）

from ：

 

Platform Builder for Microsoft Windows CE 5.0

Read/Write Example

The following code example shows how to append one file to the end of another file. In the example, =CreateFile opens two text (.txt) files: One.txt for reading and Two.txt for writing. Then, the and functions append the contents of One.txt to the end of Two.txt by reading and writing 4-KB blocks.

void AppendExample (void)
{
  HANDLE hFile, hAppend;
  DWORD dwBytesRead, dwBytesWritten, dwPos;
  char buff[4096];
  TCHAR szMsg[1000];

  // Open the existing file.

  hFile = CreateFile (TEXT("\\ONE.TXT"),      // Open One.txt
                      GENERIC_READ,           // Open for reading
                      0,                      // Do not share
                      NULL,                   // No security
                      OPEN_EXISTING,          // Existing file only
                      FILE_ATTRIBUTE_NORMAL,  // Normal file
                      NULL);                  // No template file

  if (hFile == INVALID_HANDLE_VALUE)
  {
    // Your error-handling code goes here.
    wsprintf (szMsg, TEXT("Could not open ONE.TXT"));
    return;
  }

  // Open the existing file, or, if the file does not exist,
  // create a new file.

  hAppend = CreateFile (TEXT("\\TWO.TXT"),      // Open Two.txt.
                        GENERIC_WRITE,          // Open for writing
                        0,                      // Do not share
                        NULL,                   // No security
                        OPEN_ALWAYS,            // Open or create
                        FILE_ATTRIBUTE_NORMAL,  // Normal file
                        NULL);                  // No template file

  if (hAppend == INVALID_HANDLE_VALUE)
  {
    wsprintf (szMsg, TEXT("Could not open TWO.TXT"));
    CloseHandle (hFile);            // Close the first file.
    return;
  }

  // Append the first file to the end of the second file.

  dwPos = SetFilePointer (hAppend, 0, NULL, FILE_END);
  do
  {
    if (ReadFile (hFile, buff, 4096, &dwBytesRead, NULL))
    {
      WriteFile (hAppend, buff, dwBytesRead,
                 &dwBytesWritten, NULL);
    }
  }
  while (dwBytesRead == 4096);

  // Close both files.

  CloseHandle (hFile);
  CloseHandle (hAppend);

  return;
} // End of AppendExample code

See Also