第3节 初探MFC

Windows编程基础–第3节 初探MFC

  1. 前言
    win32程序属于早期windows软件,已经逐渐被淘汰,但它的设计模式和方法大部分都被MFC所继承,并且MFC开始使用C++语言进行开发,借助C++比C语言的强大特性,使得开发windws程序更加简便、高效,更加多元化。
  2. 创建第一个MFC程序(操作系统:win10 64位 IDE:vc++ 6.0)
    1) 执行File->new,选择Project选项卡,选择下面的MFC AppWizard,填写项目名称等,如图:
    这里写图片描述
    2)点击 OK 按钮进入下一页,我们先选择简单的Dialog based,然后->NEXT ,第三页进行是否选择MFC静态库还是共享库等选择,这里我们不作修改,直接点击Finish,完成创建;
    这里写图片描述

    3)现在可以尝试编译,运行打开默认的Dialog界面
    这里写图片描述
    4)现在我们往刚才创建的Dialog中添加一些资源控件,如下图:
    这里写图片描述
    注意:ListCtrl属性中Stytle->View选择Report
    5)
    接下来我们来实现底部三个按钮的方法:
    添加按钮

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    void CDay02Dlg::OnAdd()
    {
    // TODO: Add your control notification handler code here
    CString szNumb,szName,szSala;
    GetDlgItemText(IDC_NUMB,szNumb);
    GetDlgItemText(IDC_NAME,szName);
    GetDlgItemText(IDC_SALA,szSala);
    CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
    int nCount = pList->GetItemCount();
    pList->InsertItem(nCount,szNumb);
    pList->SetItemText(nCount,1,szName);
    pList->SetItemText(nCount,2,szSala);
    }

先通过GetDlgItemText方法获取顶部三个Edit输入的参数值,并分别赋值给szNumb,szName,szSala;
接下来通过GetDlgItem取得ListCtrl的操作句柄,获取ListCtrl当前总数,在末尾添加一个Iten,并赋值;

删除按钮
1
2
3
4
5
6
7
8
9
10
11
12
void CDay02Dlg::OnDel()
{
// TODO: Add your control notification handler code here
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
int nSel = pList->GetSelectionMark();
if(nSel < 0)
{
AfxMessageBox("请先选择要删除的员工");
return;
}
pList->DeleteItem(nSel);
}

获取ListCtrl的操作句柄后获取到当前选的行数,最后删除改行;

修改按钮:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
void CDay02Dlg::OnMod()
{
// TODO: Add your control notification handler code here
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
int nSel = pList->GetSelectionMark();
if(nSel < 0)
{
AfxMessageBox("请先选择要修改的员工");
return;
}
CString szNumb,szName,szSala;
GetDlgItemText(IDC_NUMB,szNumb);
GetDlgItemText(IDC_NAME,szName);
GetDlgItemText(IDC_SALA,szSala);
pList->SetItemText(nSel,0,szNumb);
pList->SetItemText(nSel,1,szName);
pList->SetItemText(nSel,2,szSala);
}

先通过GetDlgItemText方法获取顶部三个Edit输入的参数值,并分别赋值给szNumb,szName,szSala;
接下来通过GetDlgItem取得ListCtrl的操作句柄,获取ListCtrl当前选择行数,将获取的szNumb,szName,szSala分别赋值给当前Item的对应位置;

函数原型如下:
BOOL SetItemText( int nItem, int nSubItem, LPTSTR lpszText );用于MFC设置CListCtrl控件中的列表项内容。

int GetDlgItemText( int nID, CString& rString)
nID 指定了要获取其标题的控件的整数标识符。 lpStr 指向要接收控件的标题或文本的缓冲区。 nMaxCount 指定了要拷贝到lpStr的字符串的最大长度(以字节为单位)。如果字符串比nMaxCount要长,它将被截断。 rString 对一个CString对象的引用。

3.最终效果图
这里写图片描述

  1. day02.cpp 源码
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
// day02Dlg.cpp : implementation file
//
#include "stdafx.h"
#include "day02.h"
#include "day02Dlg.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()
/////////////////////////////////////////////////////////////////////////////
// CDay02Dlg dialog
CDay02Dlg::CDay02Dlg(CWnd* pParent /*=NULL*/)
: CDialog(CDay02Dlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CDay02Dlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CDay02Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CDay02Dlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CDay02Dlg, CDialog)
//{{AFX_MSG_MAP(CDay02Dlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON4, OnButtonOK)
ON_BN_CLICKED(IDC_ADD, OnAdd)
ON_BN_CLICKED(IDC_DEL, OnDel)
ON_BN_CLICKED(IDC_MOD, OnMod)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDay02Dlg message handlers
BOOL CDay02Dlg::OnInitDialog()
{
CDialog::OnInitDialog();
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
pList->InsertColumn(0,"学号",0,100);
pList->InsertColumn(1,"姓名",0,100);
pList->InsertColumn(2,"工资",0,100);
// 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 CDay02Dlg::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 CDay02Dlg::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 CDay02Dlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CDay02Dlg::OnButtonOK()
{
// TODO: Add your control notification handler code here
}
void CDay02Dlg::OnAdd()
{
// TODO: Add your control notification handler code here
CString szNumb,szName,szSala;
GetDlgItemText(IDC_NUMB,szNumb);
GetDlgItemText(IDC_NAME,szName);
GetDlgItemText(IDC_SALA,szSala);
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
int nCount = pList->GetItemCount();
pList->InsertItem(nCount,szNumb);
pList->SetItemText(nCount,1,szName);
pList->SetItemText(nCount,2,szSala);
}
void CDay02Dlg::OnDel()
{
// TODO: Add your control notification handler code here
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
int nSel = pList->GetSelectionMark();
if(nSel < 0)
{
AfxMessageBox("请先选择要删除的员工");
return;
}
pList->DeleteItem(nSel);
}
void CDay02Dlg::OnMod()
{
// TODO: Add your control notification handler code here
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
int nSel = pList->GetSelectionMark();
if(nSel < 0)
{
AfxMessageBox("请先选择要修改的员工");
return;
}
CString szNumb,szName,szSala;
GetDlgItemText(IDC_NUMB,szNumb);
GetDlgItemText(IDC_NAME,szName);
GetDlgItemText(IDC_SALA,szSala);
pList->SetItemText(nSel,0,szNumb);
pList->SetItemText(nSel,1,szName);
pList->SetItemText(nSel,2,szSala);
}

项目源码可以访问我的码云来fork:

1
https://gitee.com/AmuUncle/MFC_CSDN.git
坚持原创技术分享,您的支持将鼓励我继续创作!
-------------本文结束感谢您的阅读-------------