1 void CportDlg::OnBnClickedButtonOpenfile()  //打开文件并显示内容
 2 {
 3     CFileDialog opendlg(true, NULL, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, (LPCTSTR)_TEXT("TXT Files (*.txt)|*.txt|All Files (*.*)|*.*||"), NULL);
 4     if (opendlg.DoModal() == IDOK){ //显示对话框并允许用户进行选择。
 5         CString filepathname = opendlg.GetPathName(); //文件路径
 6         m_file.SetWindowTextW(filepathname); //在编辑框显示文件路径
 7         CStdioFile fsend;    CString s_one;
 8         if (fsend.Open(filepathname, CFile::typeText | CFile::modeRead)) //只读模式打开txt文件
 9         {
10             while (fsend.ReadString(s_one)) { //逐行读取文件内容
11                 m_send += s_one; m_send += TEXT("\r\n");
12                 m_EditSend.SetWindowTextW(m_send); //将读取的文本显示在编辑框
13             }
14             fsend.Close();
15         }
16     }
17     else return;
18 }

 1 void CportDlg::OnBnClickedButtonSavefile() //保存文件为TXT格式
 2 {
 3     CFileDialog savedlg(false, NULL, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, (LPCTSTR)_TEXT("TXT Files (*.txt)|*.txt|All Files (*.*)|*.*||"), NULL);
 4     if (savedlg.DoModal() == IDOK){ //显示对话框并允许用户进行选择。
 5         CFile fsave(savedlg.GetPathName(), CFile::modeCreate | CFile::modeReadWrite);
 6         //CString转char[]
 7         static char str[] = ""; int count = m_receive.GetLength();
 8         for (int i = 0; i < count; i++)
 9             str[i] = m_receive[i];
10
11         fsave.Write(str, strlen(str)); //写入文件
12         //fsave.Write(m_receive, m_receive.GetLength() * 2); //读取CString信息长度，必须*2
13         fsave.Flush(); //立即写入，不缓冲
14         fsave.Close(); //文件操作结束关闭
15     }
16     else return;
17 }