C++ 在运行时更改对话框中的静态文本
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Changing static text in dialog box at runtime
提问by user3126297
I have created a dialog box and linked it to the menu item. In this case the menu item is Help -> Statistics. It all works. So when I run the program, click on the menu Help, then Statistics, a dialog box pops up.
我创建了一个对话框并将其链接到菜单项。在这种情况下，菜单项是Help -> Statistics。这一切都有效。所以当我运行程序时，点击菜单Help，然后点击Statistics，弹出一个对话框。
I also have a static text box in the dialog box. How do you change the text of this static text box at runtime?
我在对话框中还有一个静态文本框。如何在运行时更改此静态文本框的文本？
P.S: Though I have a dialog box up and running, I do not have the handle for the dialog box. If any of your solutions involve knowing the handle to the dialog box, please tell me how to retrieve it. Thanks.
PS：虽然我有一个对话框正在运行，但我没有对话框的句柄。如果您的任何解决方案涉及知道对话框的句柄，请告诉我如何检索它。谢谢。
EDIT:
编辑：
class CStatisticsDlg : public CDialogEx
{
public:
CStatisticsDlg();
// Dialog Data
enum { IDD = IDD_STATISTICS };
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
// Implementation
protected:
DECLARE_MESSAGE_MAP()
public:
};
CStatisticsDlg::CStatisticsDlg() : CDialogEx(CStatisticsDlg::IDD)
{
}
void CStatisticsDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CStatisticsDlg, CDialogEx)
END_MESSAGE_MAP()
回答by Johnny Mopp
- In Class Wizard, create a CString member variable for the label. Note: by default, labels don't have a custom id so you have to give it one like IDC_MY_LABEL.
- Somewhere before showing the dialog call
m_strMyLabel.SetWindowText("blah");
- 在类向导中，为标签创建一个 CString 成员变量。注意：默认情况下，标签没有自定义 id，所以你必须给它一个像 IDC_MY_LABEL 这样的。
- 在显示对话调用之前的某个地方
m_strMyLabel.SetWindowText("blah");
If you need to do it while the dialog is open you have to call UpdateData(FALSE)
如果您需要在对话框打开时执行此操作，则必须调用 UpdateData(FALSE)
Edit: if you don't want to create a member variable you can **corrected - typing from memory....
编辑：如果您不想创建成员变量，您可以**更正 - 从内存中输入....
// Find the label
// if called from within CStatusDlg class
CWnd *label = GetDlgItem(IDC_MY_LABEL);
label->SetWindowText("blah");
// If called from elsewhere
CStatusDlg dlg..... // create the dialog
CWnd *label = dlg.GetDlgItem(IDC_MY_LABEL);
label->SetWindowText("blah");
