subject_16822.htm

一些关于vc的问答

<p>
序号：16822 发表者：Jackie 发表日期：2002-10-04 11:29:05
<br>主题：请教：自定义消息映射的错误！
<br>内容：我在工具条中添加了一个对话框，然后按以下的步骤实现响应，但是出现了连接错误，这是为什么？请指教！<BR>1、 在头（.h）文件中加入消息响应函数的定义：<BR>&nbsp;&nbsp;&nbsp;&nbsp;afx_msg void OnSelchangeCombo();//响应CBN_SELCHANGE消息的函数<BR>2、在实现（.cpp）文件中加入消息映射宏：<BR>BEGIN_MESSAGE_MAP(CToolComboView, CFormView)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_MSG_MAP(CToolComboView)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ON_CBN_SELCHANGE(IDC_COMBOX, OnSelchangeCombo)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ON_CBN_EDITCHANGE(IDC_COMBOX, OnEditchangeCombo)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_MSG_MAP<BR>END_MESSAGE_MAP()<BR>3、在实现（.cpp）文件中加入函数实体：<BR>void CToolComboView::OnSelchangeCombo() <BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CMainFrame* frame=(CMainFrame*)AfxGetMainWnd();<BR>&nbsp;&nbsp;&nbsp;&nbsp;frame-&gt;m_wndToolBar.m_combobox.GetLBText(<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;frame-&gt;m_wndToolBar.m_combobox.GetCurSel(),m_text);<BR>&nbsp;&nbsp;&nbsp;&nbsp;UpdateData(0);<BR>}<BR><BR>连接错误提示：<BR>mgView.obj : error LNK2001: unresolved external symbol "protected: void __thiscall CImgView::OnSelchangeCombo(void)" (?OnSelchangeCombo@CImgView@@IAEXXZ)<BR>Debug/img.exe : fatal error LNK1120: 1 unresolved externals<BR><BR>
<br><a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p>
<hr size=1>
<blockquote><p>
<font color=red>答案被接受</font><br>回复者：黄飚 回复日期：2002-10-05 09:29:49
<br>内容：BEGIN_MESSAGE_MAP(CToolComboView, CFormView)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_MSG_MAP(CToolComboView)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ON_CBN_EDITCHANGE(IDC_COMBOX, OnEditchangeCombo)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_MSG_MAP<BR>ON_CBN_SELCHANGE(IDC_COMBOX, OnSelchangeCombo)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>END_MESSAGE_MAP()<BR>
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>
<hr size=1>
<blockquote><p>
回复者：Jackie 回复日期：2002-10-05 10:22:17
<br>内容：3x!麻烦你详细解释一下吗？好像还是没有解决问题，
<br>
<a href="javascript:history.go(-1)">返回上页</a><br><a href=http://www.copathway.com/cndevforum/>访问论坛</a></p></blockquote>