Help: can't open the file with c ++

guangweiyu

Everyone help

void CSfsfdsfDlg :: OnOK ()
{
UpdateData ();
CStdioFile nameFile;
         try
{
          CString a;
nameFile.Open ("E:\\sfsfdsf\\plain.txt", CFile :: modeRead)) {}
         nameFile.ReadString (m_m);
          nameFile.Close ();
         
}
catch (CFileException)
{return;}
UpdateData (FALSE);
}

DEBUG ASSERTION FAILD

minotaurus

nameFile.Open("E:\\sfsfdsf\\plain.txt",CFile::modeRead)){}

What does this sentence mean, and there is one more), what's the use of the following {}!

guangweiyu

Sorry

void CSfsfdsfDlg::OnOK()
{
UpdateData();
CStdioFile nameFile;
nameFile.Open("E:\\sfsfdsf\\plain.txt",CFile::modeRead)
         nameFile.ReadString(m_m);//Read a line from the file, read in m_m
          nameFile.Close();
         UpdateData(FALSE);
}

Error DEBUG ASSERTION FAILD

永恒之骑士

Can this code be compiled?

永恒之骑士

DEBUG ASSERTION FAILD
－－－－－－
Not a problem with this code

l4331530

Here is a person who writes data to a file, compare it and see if you can find the error.
CString strValue;
strValue = "select xx from table ";
CStdioFile f;
if (f.Open( "g:\\a.doc" ,CFile::modeCreate|CFile::modeWrite)))
{
f.WriteString( strValue );
f.Close();
}

l4331530

void CADlg::OnButton3()
{
// TODO: Add your control notification handler code here
CString str;
UpdateData();
CStdioFile nameFile;
         try
{
          CString a;
nameFile.Open("g:\\aa.txt",CFile::modeRead);
         nameFile.ReadString(str);
          nameFile.Close();
         
}
catch(CFileException)
{return;}
UpdateData(FALSE);

CWnd *pWnd;
pWnd=this->GetDlgItem(IDC_EDIT1);
pWnd->SetWindowText(str);
}

The above is the button click event, IDC_EDIT1 is the edit box, and the data in aa.txt can be read into the edit box.
Operation is correct...

guangweiyu

Thank you everyone, I found the problem
nameFile.Open("E:\\sfsfdsf\\plain.txt",CFile::modeRead) does not work
I changed nameFile.Open("E:\\sfsfdsf\\plain.txt",CFile::modeRead,NULL).