MFC: Xinxin Sun Tutorial 12 notes

This lesson is mainly about file manipulation.

One. Write a file

1. Add an item to the menu and generate the corresponding message response function

2. Increase in response function Onwrite:

Method 1:

FILE *pfile = fopen ("1.txt", "w");

Fwrite ("http://www.panda.org", 1, strlen ("http://www.panda.org"), pFile);

Fclose (PFile);

If you do not want to close the file, you can use Fflush (pFile);

If you want to move the file pointer to the beginning to write data, you can use Fseek (pFile, 0, Seek_set);

Method 2:

Method 3:

Method 4:

Two. Read file

The previous operation is almost like writing a file.

Method 1:

FILE *pfile = fopen ("1.txt", "R");

Char ch[100];

memset (CH, 0, 100);

Fread (CH, 1, h, pFile);

MessageBox (CH);

Fclose (PFile);

Method 2:

FILE *pfile = fopen ("1.txt", "R");

Char *pbuf;
Fseek (pFile, 0, seek_end);
int len = Ftell (pFile);
PBuf = new Char[len+1];
Rewind (PFile);
Fread (PBuf, 1, Len, pFile);
Pbuf[len] = 0;
MessageBox (PBUF);
Fclose (PFile);

Method 3:

Method 4:

MFC: Xinxin Sun Tutorial 12 notes