vc 添加打开文件对话框并读取文件

 1.创建打开文件对话框：  
                                CFileDialog dlg(TRUE,//TRUE是创建打开文件对话框，FALSE则创建的是保存文件对话框
                                 ".txt",//默认的打开文件的类型
                                 NULL,//默认打开的文件名
                                 OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,//打开只读文件
                                "文本文件(*.txt)|*.txt|所有文件 (*.*)|*.*||");//所有可以打开的文件类型
2.点打开文件对话框上面的确定键后
                                                if(dlg.DoModal()==IDOK)  
                                                 {
                                                  CString m_FilePath = dlg.GetPathName();////////取出文件路径
                                                  CString  m_path;
                                                 m_path=m_FilePath;//将文件的路径放入m_path
                                                 UpdateData(FALSE);
                                                 }
3.打开文件：File.Open(m_path,CFile::modeRead);
4.逐行读取文件：CStdioFile File;///可以逐行读文件的类
                         CString   strLine;    
                         while(File.ReadString(strLine))   //////将每行都放进strLine字符串里
                         {    
                          AfxMessgeBox(strLine);
                         }  
5判断读出来的字：
                          strLine=“1|2|3|”;//要判断的字符串
                          int strIndex1  = strLine.Find('|');//在字符串中寻找“|”
                          CString a[11];
                          if(-1 != strIndex1)//只要找到“|”就不会返回-1
                          {
                           int i=0;
                               while(  -1 != strIndex1)//
                               {    
                                   strIndex1 = strLine.Find('|');
                                   a[i] = strLine.Left(strIndex1);
                                  strLine = strLine.Right(strLine.GetLength() - strIndex1-1) ;
                                   i++;
                                  if (i > 10)//退出循环
                                  break;
                                 }
                       }

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/halibobo520/archive/2008/11/25/3371944.aspx