[c++]讀檔迴圈使用注意feof()

 FILE* pFile;
 while (!feof(pFile)) {
  //fread 讀取
  //資料處理
 }
 //如先使用fread讀取，再來判斷feof，當feof判斷為true時就跳離loop
 while (1) {
  //fread讀取
  if (feof(pFile))
    break;
 }

測試環境 vc 2015 mfc

[c++]開檔讀檔寫檔fopen() fwrite()

//在mfc中使用前請先至Stdafx.h 宣告定義

#define _CRT_SECURE_NO_WARNINGS

---------以下為範例--------------------------

FILE *pFile;
char cbuffer[] = { 'h','e','l' ,'l' ,'o' };
pFile = fopen("hello.txt", "w");
if (pFile == NULL)
{
 MessageBox(L"empty");
}
else
{
 fwrite(cbuffer,1, sizeof(cbuffer), pFile);
}
fclose(pFile);

測試環境:2015--mfc

參考以下:

FILE * fopen ( const char * filename, const char * mode );

[C#]開啟外部執行檔/關閉外部執行檔

兩個函式宣告,需要 using System.Diagnostics;

----------------------使用方式-------------------------------------------

OpenPress("AAA.exe", " ");//開啟外部檔案

ClosePress("AAA.exe");//關閉外部檔案

----------------------以下為函式-------------------------------------------

public static bool OpenPress(string FileName, string Arguments)//開啟外部檔案
       {
           Process pro = new Process();
           if(System.IO.File.Exists(FileName))
           {
               pro.StartInfo.FileName = FileName;
               pro.StartInfo.Arguments = Arguments;
               pro.StartInfo.CreateNoWindow = true;
               pro.StartInfo.CreateNoWindow = true;
               pro.StartInfo.UseShellExecute = false;
               pro.StartInfo.RedirectStandardInput = true;
               pro.StartInfo.RedirectStandardOutput = true;
               pro.StartInfo.CreateNoWindow = true;               
               pro.Start();

               return true;
           }
           return false;
       }

public static bool ClosePress(string FileName)//關閉外部檔案
       {
           Process[] proa = Process.GetProcesses();//獲取任務管理器中所有進程
           foreach(Process p1 in proa)
           {
               try
               {
                   string processName = p1.ProcessName.ToLower().Trim();
                   if(processName == FileName)
                   {
                       p1.WaitForExit(1000);                       
                       p1.Kill();
                       p1.CloseMainWindow();
                   }
               }
               catch { return false; }
           }
           return true;
       }
----------分隔線 說明--------------------

1.前言
透過程式控制，可在背景執行cmd.exe的命令。
2.說明
程式碼，提供兩種方式執行命令:
//程式碼最少，但是會跳出DOS視窗，閃一下後自行關閉
System.Diagnostics.Process.Start("cmd.exe", @"/c dir");

//在背景執行，無DOS視窗閃爍問題
System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.Arguments = @"/c dir";
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
p.Start();

[c++]MFC使用dlg 指定開啟資料夾獲取路徑

// Example code
CFolderPickerDialog m_dlg;
CString m_Folder;
 
m_dlg.m_ofn.lpstrTitle = _T("Put your title here");
m_dlg.m_ofn.lpstrInitialDir = _T("C:\\");
if (m_dlg.DoModal() == IDOK) {
       m_Folder = m_dlg.GetPathName();   // Use this to get the selected folder name 
                                         // after the dialog has closed
 
       // May need to add a '\' for usage in GUI and for later file saving, 
       // as there is no '\' on the returned name
       m_Folder += _T("\\");
       UpdateData(FALSE);   // To show updated folder in GUI
 
       // Debug
       TRACE("\n%S", m_Folder);
}
// End of example

測試環境:MFC

[C#]讀檔，彈出DLG，指定檔名

//彈跳出DLG 選擇TXT檔案 讀取字串

ArrayList alWorkPoint = new ArrayList();

//System.Windows.Forms.ListView listView_CM; 宣告的Listview元件

OpenFileDialog dialog = new OpenFileDialog();

dialog.Title = "Select file";
dialog.InitialDirectory = ".\\";
dialog.Filter = "txt files (*.*)|*.txt";
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                StreamReader filer = new StreamReader((dialog.FileName));
                alWorkPoint.Clear();
                listView_CM.Items.Clear();
                string str;
                while ((str = filer.ReadLine()) != null)
                {
                    alWorkPoint.Add(str);
                }
                DecoderFileToListView();
                filer.Close();
            }

//指定檔名，讀取單一檔案

StreamReader filer = new StreamReader(("new.txt"));
string str;
while((str = filer.ReadLine()) != null)
{
    MessageBox.Show(str);
}


測試環境:vs2015 c#.net