subject_51006.htm

一些关于vc的问答

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序号：51006 发表者：鹏程 发表日期：2003-08-28 12:57:02
<br>主题：怎样处理本问题？
<br>内容：我在“About”对话框中放置了两个编辑框EDIT1和EDIT2，成员变量为m_edit1和m_edit2。我想在运行时，在EDIT1中输入文字，当在打字时，要求在EDIT2中显示出在EDIT1中敲入的文字。<BR><BR>&nbsp;&nbsp; 请教:如果使用“动态数据交换技术UpdateData( )”解决该问题， 那么应该怎样添加消息及函数？&nbsp;&nbsp;&nbsp;&nbsp; <BR><BR><BR>“About”对话框的代码下：<BR>/////////////////////////////////////////////////////////////////////////////<BR>// CAboutDlg dialog used for App About<BR><BR>class CAboutDlg : public CDialog<BR>{<BR>public:<BR>&nbsp;&nbsp;&nbsp;&nbsp;CAboutDlg();<BR><BR>// Dialog Data<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_DATA(CAboutDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;enum { IDD = IDD_ABOUTBOX };<BR>&nbsp;&nbsp;&nbsp;&nbsp;CString&nbsp;&nbsp;&nbsp;&nbsp;m_edit1;<BR>&nbsp;&nbsp;&nbsp;&nbsp;CString&nbsp;&nbsp;&nbsp;&nbsp;m_edit2;<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_DATA<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;// ClassWizard generated virtual function overrides<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_VIRTUAL(CAboutDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;protected:<BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual void DoDataExchange(CDataExchange* pDX);&nbsp;&nbsp;&nbsp;&nbsp;// DDX/DDV support<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_VIRTUAL<BR><BR>// Implementation<BR>protected:<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_MSG(CAboutDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_MSG<BR>&nbsp;&nbsp;&nbsp;&nbsp;DECLARE_MESSAGE_MAP()<BR>};<BR><BR>CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_DATA_INIT(CAboutDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_edit1 = _T(&#34;&#34;);<BR>&nbsp;&nbsp;&nbsp;&nbsp;m_edit2 = _T(&#34;&#34;);<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_DATA_INIT<BR>}<BR><BR>void CAboutDlg::DoDataExchange(CDataExchange* pDX)<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CDialog::DoDataExchange(pDX);<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_DATA_MAP(CAboutDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;DDX_Text(pDX, IDC_EDIT1, m_edit1);<BR>&nbsp;&nbsp;&nbsp;&nbsp;DDX_Text(pDX, IDC_EDIT2, m_edit2);<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_DATA_MAP<BR>&nbsp;&nbsp;&nbsp;&nbsp;<BR>}<BR><BR>BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)<BR>&nbsp;&nbsp;&nbsp;&nbsp;//{{AFX_MSG_MAP(CAboutDlg)<BR>&nbsp;&nbsp;&nbsp;&nbsp;//}}AFX_MSG_MAP<BR>END_MESSAGE_MAP()<BR><BR>// App command to run the dialog<BR>void CXApp::OnAppAbout()<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;CAboutDlg aboutDlg;<BR>&nbsp;&nbsp;&nbsp;&nbsp;aboutDlg.DoModal();<BR>} 
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<font color=red>答案被接受</font><br>回复者：iamhere 回复日期：2003-08-28 14:32:05
<br>内容：对Edit1添加EN_CHANGE事件的响应，在响应函数中这么写就可以了：<BR><BR>UpdateData( TRUE );<BR>m_edit2 = m_edit1;<BR>UpdateData( FALSE );
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回复者：鹏程 回复日期：2003-08-28 15:38:11
<br>内容：非常感谢！！！
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