Mike,
We can go for CStringArray in case of less number of lines in a file.
AFAIK CStringArray's object memory will not release immediately after
CStringArrayObject.RemoveAll() called, in case of huge number of lines in a
file.
I suggest, Create temporary file and Update modified data into this.
Then Make 0 Kb size for source file then delete it.
Please correct me If I am wrong.
Regards,
John.
"Mike Butler" <antivirus@jhuapl.edu> wrote in message
news:glnrkd$c9k$1@aplnetnews.jhuapl.edu...
Read file into a CstringArray.
Parse the CstringArray and edit the contents of the CString of interest.
Write CStringArray back to file.
"zack" <zack@discussions.microsoft.com> wrote in message
news:AB723EF4-CB8F-45BE-9CED-4B3DA9736037@microsoft.com...
Hi I am trying to cahnge one line in a TXT file (log file of my
application),
the TXT file already include many line and i try to recognize the line i
need and then update it with the string i need,
But WriteString looks like it finish fine no fail,
But the TXT file doesn't change .
Here is the code:
CString readLine,CompareResultFile="c:\a.txt";//the file path is just an
example
CStdioFile LogFile_CStdioFile;
char * full_Log_file_path= (char*)malloc (_MAX_PATH);
int numLines=0;
TCHAR PASS_test[] = _T("Result: PASS");
TCHAR FAIL_test[] = _T("Result: FAIL");
if (!LogFile_CStdioFile.Open(CompareResultFile, CFile::modeReadWrite ))
{
return FALSE;
}
while(LogFile_CStdioFile.ReadString(readLine) )
{
sprintf(full_Log_file_path,"%S",readLine.GetBuffer(0));
if(strncmp(full_Log_file_path,"Result:",7))
{
numLines++;
continue;
}
else
{
if(Status)
{
LogFile_CStdioFile.WriteString(PASS_test);
}
else
{
LogFile_CStdioFile.WriteString(FAIL_test);
}
break;
}
}
LogFile_CStdioFile.Close();
I need suggestion what is the best way to update one line?