初学者提问：如何在对话框中更新单个（编辑）控件？ [英] Beginners question: how to update a single (edit) control in a dialog ?

问题描述

非常非常新的visual c ++（3天），我有一个问题，我似乎没有找到答案。



如何在对话框应用程序中更新单个编辑控件中的数据？



UpdateData可以解决问题对于整个对话框中的所有控件，但我需要更新一个（编辑）控件，同时让其他控件完全独立。



任何建议都非常感激。

解决方案

嗨

您需要获取CEdit类型的指针并将其用于数据交换以设置文本或从编辑控件获取文本。以下链接可能有所帮助：



编辑框 [ ^ ]



MFC中的对话数据交换 [ ^ ]



还在MSDN中搜索有关基于MFC Dialog的应用程序编程的更多相关信息：

MSDN [ ^ ]

对话框窗口的每个控件都有一个唯一的ID（静态控件除外）。要访问控件，可以将此ID（请参阅资源视图中的对话框模板）传递给 GetDlgItem（） [ ^ ]功能。一旦你有一个指向这个控件的指针，你可以访问成员函数，如 SetWindwText（），它将设置编辑控件的文本：

 CEdit * pEdit =（CEdit *）GetDlgItem（IDC_MYEDIT）; 
 pEdit-> SetWindwoText（_T（ 新文字））; 

另一种选择是将成员变量分配给编辑控件。您可以使用资源编辑器执行此操作。然后使用此变量来更改编辑控件的文本（例如m_Edit1.SetWindowText（_T（New Text）））。这是推荐的方式。如果所有可能更改的控件都有这样的成员变量并使用它进行更新，则可以省略对 UpdateData（）的调用。

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感谢您的建议。奇怪的是，我在发布问题后1分钟就找到了解决方案。



我基本上使用了Jochen建议的第一种方法，并且工作得很好。

很高兴知道第二个，但我可以看到一个在以后派上用场。



Chandanadhikari建议的第一个链接确实是正确，这是我找到解决方案的地方。



感谢您的帮助。

Hi,

Very very new to visual c++ (3 days) and I have a question I do not seem to find an answer to.

How do you update the data in an individual edit control in a dialog application ?

"UpdateData" does the trick for all controls in the whole dialog but I need to update just one (edit) control while leaving the other ones well alone.

Any suggestion much appreciated.

解决方案

hi
you need to get a pointer of type CEdit and use it for data exchange to set the text or get the text from the edit control. Following links might help:

editbox[^]

Dialog Data Exchange in MFC[^]

also search in MSDN for more related information on MFC Dialog based application programming:
MSDN[^]

Each control of a dialog window has a unique ID (besides static controls). To access a control, you can pass this ID (see your dialog template in the resource view) to the GetDlgItem()[^] function. Once you have a pointer to this control, you can access member functions like SetWindwText() which will set the text for edit controls:

CEdit* pEdit = (CEdit*)GetDlgItem(IDC_MYEDIT);
pEdit->SetWindwoText(_T("New text"));

Another option is to assign a member variable to the edit control. You can do this using the resource editor. Then use this variabale to change the text of your edit control (e.g. m_Edit1.SetWindowText(_T("New Text"))). This is the recommended way. If all controls that may be changed have such a member variable and use it for updating, you can omit the calls to UpdateData().

Hi,

Thanks for the suggestions. Strangely enough I found the solution myself 1 minute after posting the question.

I have basically used the first method suggested by Jochen and that works just fine.
Good to know about the second one though, I can see that one coming in handy at a later date.

The first link suggested by Chandanadhikari is indeed correct, that is where I found the solution.

Thanks for the help.

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