How to change/append the text of edit control box in that dialog when i pressed the push button in dialog window

mfcvisual c++

I am doing calculator program by using dialog based vc++/MFC application. In a dialog box, I added a edit text control and a push button. So I need to change/append the text of the edit control box in that dialog when I click the button on the dialog. To display the text am using Setsel() and ReplaceSel() methods in ButtonClicked method, but it's not working.

Show the relevant portion of your code and relevent artical.

basu

Best Answer

If all you want to do is display some text in a CEdit control then why not use it's SetWindowText function?

The following replaces the contents using your SetSel/ReplaceSel method:

void CTextCtrlAddDlg::OnBnClickedButton1()
{
    int start = 0;
    int end = m_editControl.GetWindowTextLength();
    m_editControl.SetSel(start, end);
    m_editControl.ReplaceSel(L"Test");
}

...where m_editControl is the edit control. If you want to append the text at the end, simply set the selection to the end:

void CTextCtrlAddDlg::OnBnClickedButton1()
{
    int end = m_editControl.GetWindowTextLength();
    m_editControl.SetSel(end, end);
    m_editControl.ReplaceSel(L"Test");
}

I agree with Goz though; some example code frmo you would help us identify what isn't working for you.

Related Solutions

Change Edit Box content when Button is clicked in mfc

You can set the text of an Edit control (wrapped by the CEdit class in MFC) by calling the SetWindowText method, which it inherits from the CWnd base class.

So then all you need to do is respond to a click event on your button control. You do this by listening for the BN_CLICKED notification from the appropriate button control within your parent window's OnCommand method.

Something like:

BOOL CMyDialog::OnCommand(WPARAM wParam, LPARAM lParam)
{
    if (HIWORD(wParam) == BN_CLICKED && LOWORD(lParam) == IDC_MYBUTTON)
    {
        m_Edit.SetWindowText(TEXT("My string"));
    }
    return CWnd::OnCommand(wParam, lParam);
}

Obtaining and reading a book on MFC would be very helpful. This is fairly basic stuff, but it's a lot to cover in a single answer if you don't already understand the fundamental concepts.

Using the Class Wizard would make this even easier... Invoke it with the Ctrl+W keys and follow the on-screen instructions. You'll end up with something like:

void CMyDialog::OnMyButton()
{
    m_Edit.SetWindowText(TEXT("My string"));
}

How to set a default value for “Edit control box” in a Dialog that is added to MFC Doc/Frame project

You can use OnInitDialog () to set any dialog values before the dialog displays. There are multiple ways to accomplish it. Here are two...

You can use SetWindowText to insert a string value into the control.
Define the control with a member variable that accepts a CString value. Assign a default value to the variable. OnInitDialog should handle updating the field.

Best Answer

Related Solutions

Change Edit Box content when Button is clicked in mfc

How to set a default value for “Edit control box” in a Dialog that is added to MFC Doc/Frame project

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