VC/MFC將cmd的執行結果顯示在rich-edit控件上

立MFC工程，畫控件。

2.建立控件對應的成員變量

CRichEditCtrl m_ctrlRichEdit;

3.增加對應的消息映射函數

void CMFCApplication1Dlg::OnBnClickedButton1()
{

	std::thread t(ThreadProc, this);
	t.detach();

}

void CMFCApplication1Dlg::AppendText(CString str)
{
	m_ctrlRichEdit.PostMessage(WM_VSCROLL, SB_BOTTOM, 0);
	m_ctrlRichEdit.SetSel(-1, -1);
	m_ctrlRichEdit.ReplaceSel((LPCTSTR)str);
}


int CMFCApplication1Dlg::ExecCmd()
{
	SECURITY_ATTRIBUTES sa;
	HANDLE hRead, hWrite;
	sa.nLength = sizeof(SECURITY_ATTRIBUTES);
	sa.bInheritHandle = TRUE;
	sa.lpSecurityDescriptor = NULL;
	if (!CreatePipe(&hRead, &hWrite, &sa, 0))
	{
		DWORD dErr = GetLastError();
		CString szInfo;
		szInfo.Format(_T("Fail to Create Pipe Error: %d"), dErr);
		MessageBox(szInfo);
		return -1;
	}
	STARTUPINFO si;
	PROCESS_INFORMATION pi;
	si.cb = sizeof(STARTUPINFO);
	GetStartupInfo(&si);
	si.hStdError = hWrite;
	si.hStdOutput = hWrite;
	si.wShowWindow = SW_HIDE;
	si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
	TCHAR szCommand[] = _T("cmd.exe /k ipconfig/all");
	if (!CreateProcess(NULL, szCommand, NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi))
	{
		MessageBox(_T("Fail to create process"));
		return -2;
	}

	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);
	CloseHandle(hWrite);
	char buffer[4096] = { 0 };
	DWORD bytesRead;

	for (;;)
	{
		if (ReadFile(hRead, buffer, 4096, &bytesRead, NULL) == NULL || bytesRead == 0)
		{
			break;//讀取結束
		}
		else
		{
			TCHAR szShow[4096] = { 0 };
			MultiByteToWideChar(CP_ACP, NULL, buffer, 4096, szShow, 4096);
			AppendText(szShow);
		}
	}


	return 0;
	// __super::OnOK();  
}

BOOL CMFCApplication1Dlg::PreTranslateMessage(MSG* pMsg)
{
	if ((VK_F1 == pMsg->wParam && WM_KEYDOWN == pMsg->message) || (pMsg->message == 77))
		return true;
	else
		return CDialogEx::PreTranslateMessage(pMsg);
}

配套視頻鏈接：https://www.ixigua.com/6991292532273447431

.首先在添加在資源視圖中添加CRichEditCtrl控件，并關聯變量：

圖1

注意將屬性Multiline和Read Only設為True:

圖2

2.初始化控件

在BOOL CRichEditTestApp::InitInstance()函數中添加：

...
if (!AfxInitRichEdit2())
{
    return FALSE;
}
...

3. 設置字體大小顏色

參考自Richedit在結尾添加一行，同時設置字體，大小及顏色，并在添加后自動滾屏到末行

int CRichEditTestDlg::GetNumVisibleLines(CRichEditCtrl* pCtrl)
{
    CRect rect;
    long nFirstChar, nLastChar;
    long nFirstLine, nLastLine;

    // Get client rect of rich edit control
    pCtrl->GetClientRect(rect);

    // Get character index close to upper left corner
    nFirstChar = pCtrl->CharFromPos(CPoint(0, 0));

    // Get character index close to lower right corner
    nLastChar = pCtrl->CharFromPos(CPoint(rect.right, rect.bottom));
    if (nLastChar < 0)
    {
        nLastChar = pCtrl->GetTextLength();
    }

    // Convert to lines
    nFirstLine = pCtrl->LineFromChar(nFirstChar);
    nLastLine = pCtrl->LineFromChar(nLastChar);

    return (nLastLine - nFirstLine);
}

int CRichEditTestDlg::AppendToLogAndScroll(const CString& csMsg, COLORREF color, int iFontSize)
{
    long nVisible = 0;
    long nInsertionPoint = 0;
    CHARFORMAT cf;
    m_richEdit.GetSelectionCharFormat(cf);
    // Initialize character format structure
    cf.cbSize = sizeof(CHARFORMAT);
    //static int iHeight = 1000;
    cf.dwMask |= CFM_BOLD;
    cf.dwEffects |= CFE_BOLD;//設置粗體，取消用cf.dwEffects&=~CFE_BOLD;
    cf.dwEffects &= ~CFE_AUTOCOLOR;
    cf.dwMask |= CFM_COLOR;
    cf.crTextColor = color;
    cf.dwMask |= CFM_SIZE;
    cf.yHeight = iFontSize;//設置高度
    cf.dwMask |= CFM_FACE;
    _tcscpy_s(cf.szFaceName, _T("微軟雅黑"));//設置字體
    // Set insertion point to end of text
    nInsertionPoint = m_richEdit.GetWindowTextLength();
    m_richEdit.SetSel(nInsertionPoint, -1);

    // Set the character format
    m_richEdit.SetSelectionCharFormat(cf);

    // Replace selection. Because we have nothing
    // selected, this will simply insert
    // the string at the current caret position.
    m_richEdit.ReplaceSel(csMsg);

    // Get number of currently visible lines or maximum number of visible lines
    // (We must call GetNumVisibleLines() before the first call to LineScroll()!)
    nVisible = GetNumVisibleLines(&m_richEdit);

    // Now this is the fix of CRichEditCtrl's abnormal behaviour when used
    // in an application not based on dialogs. Checking the focus prevents
    // us from scrolling when the CRichEditCtrl does so automatically,
    // even though ES_AUTOxSCROLL style is NOT set.
    if (&m_richEdit != m_richEdit.GetFocus())
    {
        m_richEdit.LineScroll(INT_MAX);
        m_richEdit.LineScroll(1 - nVisible);
    }

    return 0;
}

4.使用示例：

void CRichEditTestDlg::OnBnClickedTest()
{
    CString strPerRet;
    strPerRet.Format(_T("紅色行\n"));
    AppendToLogAndScroll(strPerRet, RGB(255, 0, 0), 300);

    strPerRet.Format(_T("綠色行\n"));
    AppendToLogAndScroll(strPerRet, RGB(0, 255, 0), 300);

    strPerRet.Format(_T("藍色行\n"));
    AppendToLogAndScroll(strPerRet, RGB(0, 0, 255), 300);
}

5.效果圖

效果圖

6.代碼

https://download.csdn.net/download/xy18990/11267263

// 1Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "1.h"
#include "1Dlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
CAboutDlg();

// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA

// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
//}}AFX_VIRTUAL

// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMy1Dlg dialog

CMy1Dlg::CMy1Dlg(CWnd* pParent )
: CDialog(CMy1Dlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CMy1Dlg)
m_num1 = 0.0;
m_num2 = 0.0;
m_result = 0.0;
m_operator = -1;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMy1Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CMy1Dlg)
DDX_Control(pDX, IDC_BUTTON1, m_reset);
DDX_Text(pDX, IDC_EDIT1, m_num1);
DDX_Text(pDX, IDC_EDIT2, m_num2);
DDX_Text(pDX, IDC_EDIT3, m_result);
DDX_Radio(pDX, IDC_RADIO1, m_operator);
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMy1Dlg, CDialog)
//{{AFX_MSG_MAP(CMy1Dlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_EN_CHANGE(IDC_EDIT1, OnChangeNum1)
ON_EN_CHANGE(IDC_EDIT2, OnChangeNum2)
ON_EN_CHANGE(IDC_EDIT3, OnResult)
ON_BN_CLICKED(IDC_BUTTON1, OnReset)
ON_BN_CLICKED(IDC_RADIO1, OnRadio1)
ON_BN_CLICKED(IDC_RADIO2, OnRadio2)
ON_BN_CLICKED(IDC_RADIO3, OnRadio3)
ON_BN_CLICKED(IDC_RADIO4, OnRadio4)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMy1Dlg message handlers

BOOL CMy1Dlg::OnInitDialog()
{
CDialog::OnInitDialog();

// Add "About..." menu item to system menu.

// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}

// Set the icon for this dialog.  The framework does this automatically
//  when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMy1Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CMy1Dlg::OnPaint() 
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMy1Dlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void CMy1Dlg::OnChangeNum1() 
{
// TODO: If this is a RICHEDIT control, the control will not
UpdateData(TRUE);
// send this notification unless you override the CDialog::OnInitDialog()
// function and call CRichEditCtrl().SetEventMask()
// with the ENM_CHANGE flag ORed into the mask.
switch(m_operator)
{
case 0:
m_result=m_num1+m_num2;
break;
case 1:
m_result=m_num1-m_num2;
break;
case 2:
m_result=m_num1*m_num2;
break;
case 3:
m_result=m_num1/m_num2;
break;
}
// TODO: Add your control notification handler code here
UpdateData(FALSE);
}

void CMy1Dlg::OnChangeNum2() 
{
// TODO: If this is a RICHEDIT control, the control will not
// send this notification unless you override the CDialog::OnInitDialog()
// function and call CRichEditCtrl().SetEventMask()
// with the ENM_CHANGE flag ORed into the mask.
OnChangeNum1();
// TODO: Add your control notification handler code here
}

void CMy1Dlg::OnResult() 
{
// TODO: If this is a RICHEDIT control, the control will not
// send this notification unless you override the CDialog::OnInitDialog()
// function and call CRichEditCtrl().SetEventMask()
// with the ENM_CHANGE flag ORed into the mask.
//cout<<m_result;
// TODO: Add your control notification handler code here
}

void CMy1Dlg::OnReset() 
{
// TODO: Add your control notification handler code here
m_result=m_num1=m_num2=m_operator=0;
UpdateData(FALSE);
}

void CMy1Dlg::OnRadio1()
{
OnChangeNum1();
}
void CMy1Dlg::OnRadio2() 
{
// TODO: Add your control notification handler code here
OnChangeNum1();
}

void CMy1Dlg::OnRadio3() 
{
// TODO: Add your control notification handler code here
OnChangeNum1();
}

void CMy1Dlg::OnRadio4() 
{
// TODO: Add your control notification handler code here
OnChangeNum1();
}

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