如何从复选框中检索数据? [英] How do I retrieve the data from a check box?

问题描述

我已经在VC ++中创建了一个复选框，但是我不确定如何从中检索信息.是否给它分配一个BOOL或CButton变量?

我尝试为其分配变量BOOL m_Check_Box，并添加了事件处理程序
DDX_Control(pDX, IDC_displaydepthline, m_Check_Box);
但我不确定如何在:
中检索值

Hi,

I have created a check box in VC++ but I''m not sure how to retrieve the information from it. Do I assign it a variable that is a BOOL OR CButton?

I have tried to assign it the variable BOOL m_Check_Box and I''ve added the event handler
DDX_Control(pDX, IDC_displaydepthline, m_Check_Box);
but I''m not sure how to retrieve the value in :

void CCleanViewDlg::OnBnClickeddisplaydepthline
{
     UpdateData();
     int l_ChkBox = (int)m_Check_Box;
     UpdateData(FALSE);
}

我收到错误消息:``DDX_Control'':无法将参数3从``BOOL''转换为``CWnd&''.

我也尝试过将m_Check_Box设为CButton并使用
检索值 int l_ChkBox = m_Check_Box.GetCheck();
但这只会导致一堆访问冲突读取位置0x00000000"错误.

任何帮助将不胜感激！
谢谢！

I get the error:''DDX_Control'' : cannot convert parameter 3 from ''BOOL'' to ''CWnd &''.

I''ve also tried making m_Check_Box a CButton and retrieving the value using
int l_ChkBox = m_Check_Box.GetCheck();
but that just sit out a bunch of "Access violation reading location 0x00000000" errors.

Any help would be greatly appreciated!
Thanks!

推荐答案

好吧，您将变量名拼错了.在事件处理程序中，您使用m_CheckBox，但是您尝试使用m_Check_Box来检索控件的轮廓.

Well, you misspelled the variable name for one thing. In the event handler, you use m_CheckBox, but you''re trying to retrieve the control''s staete using m_Check_Box.

您可以通过两种方式进行操作:

You can do it in two ways:

1. 添加类型为CButton的成员变量，假设它名为m_btnCheck，然后在DoDataExchange中添加以下内容:
   

1. Add a member variable of type CButton, let''s say it''s named m_btnCheck, then add in your DoDataExchange the following:
   

DDX_Control(pDC, IDC_displaydepthline, m_btnCheck);

最后在您的处理程序中:

And finally in your handler:

void CCleanViewDlg::OnBnClickeddisplaydepthline()
{
   BOOL bChecked = (m_btnCheck.GetCheck() == BST_CHECKED);
}

添加类型为int的成员变量，假设它名为m_iCheck，然后在您的DoDataExchange中添加以下内容:

Add a member variable of type int, let''s say it''s named m_iCheck, then add in your DoDataExchange the following:

DDX_Check(pDC, IDC_displaydepthline, m_iCheck);

最后在您的处理程序中:

And finally in your handler:

void CCleanViewDlg::OnBnClickeddisplaydepthline()
{
   UpdateData();
   BOOL bChecked = (m_iCheck == BST_CHECKED);
}

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