MFC入门示例之访问对话框控件的7种方法

方法一：

//方法一 
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    int num1, num2, num3;
    TCHAR ch1[12], ch2[12], ch3[12];
    //获取文本值
    GetDlgItem(IDC_EDIT1)->GetWindowText(ch1,12);
    GetDlgItem(IDC_EDIT2)->GetWindowText(ch2,12);
    //字符串转为数字
    num1 = _ttoi(ch1);
    num2 = _ttoi(ch2);
    num3 = num1 + num2;
    
    _itot(num3, ch3, 10);//数字转化为字符串(10进制)
    GetDlgItem(IDC_EDIT3)->SetWindowTextW(ch3);
}

方法二：

//方法二 
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    int num1, num2, num3;
    TCHAR ch1[12], ch2[12], ch3[12];
    //获取文本值
    GetDlgItemText(IDC_EDIT1, ch1, 12);
    GetDlgItemText(IDC_EDIT2, ch2, 12);
    //字符串转为数字
    num1 = _ttoi(ch1);
    num2 = _ttoi(ch2);
    num3 = num1 + num2;
    
    _itot(num3, ch3, 10);//数字转化为字符串(10进制)
    SetDlgItemText(IDC_EDIT3, ch3);
}

方法三：

//方法三 
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    int num1, num2, num3;
    //获取文本值
    num1 = GetDlgItemInt(IDC_EDIT1);
    num2 = GetDlgItemInt(IDC_EDIT2);
    num3 = num1 + num2;
    
    SetDlgItemInt(IDC_EDIT3,num3);
}

方法四：

//方法四 控件和整型变量相关联
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    //同步控件到变量
    UpdateData(TRUE);
    m_num3 = m_num2 + m_num1;
    //同步变量到控件
    UpdateData(FALSE);
}

方法五：

//方法五 控件和控件变量相关联
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    int num1, num2, num3;
    TCHAR ch1[12], ch2[12], ch3[12];
    //获取值
    m_edit1.GetWindowText(ch1,12);
    m_edit2.GetWindowText(ch2,12);
    //字符串转为数字
    num1 = _ttoi(ch1);
    num2 = _ttoi(ch2);
    num3 = num1 + num2;
    _itot(num3, ch3, 10);//数字转化为字符串(10进制)

    m_edit3.SetWindowText(ch3);
}

方法六：

//方法六 Windows API SendMessage
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    int num1, num2, num3;
    TCHAR ch1[12], ch2[12], ch3[12];
    
    ::SendMessage(GetDlgItem(IDC_EDIT1)->m_hWnd,WM_GETTEXT,12,(LPARAM)ch1);
    ::SendMessage(GetDlgItem(IDC_EDIT2)->m_hWnd,WM_GETTEXT,12,(LPARAM)ch2);
     
    num1 = _ttoi(ch1);
    num2 = _ttoi(ch2);
    num3 = num1 + num2;
    _itot(num3, ch3, 10);//数字转化为字符串(10进制)

    ::SendMessage(GetDlgItem(IDC_EDIT3)->m_hWnd,WM_SETTEXT,0,(LPARAM)ch3);
}

方法七：

//方法七 Windows API SendDlgItemMessage
void CMFCApplication2Dlg::OnBnClickedButton1()
{
    int num1, num2, num3;
    TCHAR ch1[12], ch2[12], ch3[12];

    SendDlgItemMessage(IDC_EDIT1, WM_GETTEXT, 12, (LPARAM)ch1);
    SendDlgItemMessage(IDC_EDIT2, WM_GETTEXT, 12, (LPARAM)ch2);

    num1 = _ttoi(ch1);
    num2 = _ttoi(ch2);
    num3 = num1 + num2;
    _itot(num3, ch3, 10);//数字转化为字符串(10进制)

    SendDlgItemMessage(IDC_EDIT3, WM_SETTEXT, 0, (LPARAM)ch3);
}