Clearing textboxes with button click

[meepokman]

Hi guys, I'm trying to make some textboxes be cleared in my Windows Form with a single button click, but I seem to have some problems. I tried the code below for the button but it keeps giving me a "error C2228: left of '.text' must have class/struct/union" problem.

void CzebraDlg::OnBnClickedClearimagedatabase()
{
	IDC_Box01.text=""; //The textbox ID is IDC_Box01
}

The editor code when I double click the textbox I want to clear is below

void CzebraDlg::OnEnChangeBox01()
{
	// TODO:  If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.

	// TODO:  Add your control notification handler code here
}

I have about 20 or so boxes (IDC_Box01-20) to clear with the same button in a single click, so using the above format might be a little tedious, but I want to try and get the basic clearing of a textbox working in the first place before I complicate things.

I'm using MFC to build the form. Can anyone help? Thanks for any help in advance.

[siavoshkc]

You should first create a variable for your textbox and you cannot access i using its resource ID. If you are using VC++, there is a wizard to do so. Hmmm, right click on the button in form design and you'll find it.

[meepokman]

Hi there, I did as you said and used to wizard. It seems to have created a "CEdit m_Box01Ctl" in the header file linked to my Form dialog (code below).

public:
	CEdit m_Box01Ctl;
	CEdit m_Box02Ctl;
	CEdit m_Box03Ctl;
	CEdit m_Box04Ctl;
	CEdit m_Box05Ctl;
	CEdit m_Box06Ctl;
	CEdit m_Box07Ctl;
	CEdit m_Box08Ctl;
	CEdit m_Box09Ctl;
	CEdit m_Box10Ctl;
	CEdit m_Box11Ctl;
	CEdit m_Box12Ctl;
	CEdit m_Box13Ctl;
	CEdit m_Box14Ctl;
	CEdit m_Box15Ctl;
	CEdit m_Box16Ctl;
	CEdit m_Box17Ctl;
	CEdit m_Box18Ctl;
	CEdit m_Box19Ctl;
	CEdit m_Box20Ctl;

I tried using:

void CzebraDlg::OnBnClickedClearimagedatabase()
{
	m_Box01Ctl.text=""; //The textbox ID is IDC_Box01
}

But it gives me a "error C2039: 'text' : is not a member of 'CEdit'". Do you know the command I need to control the box and empty it?

Also, another problem I have, is that I want to make a radio button not selected by default when I start the program. I realise that the first of my radio buttons is always selected when I start the program but I want it to only be selected when I click it. Thanks a lot for the reply and any help in advance.

[siavoshkc]

Usually when you type '.' after "m_Box01Ctl" IDE pops up a list of members which you can select one of them. Remember C++ is case sensitive so "text" is different from "Text". Use MSDN to study member variables.

In this case use SetWindowText() and GetWindowText().

[meepokman]

Hi there, thank you very much. I've managed to solve the problem with what you told me and the MSDN help. I used:

void CzebraDlg::OnBnClickedClearimagedatabase()
{
	CWnd* pWnd = GetDlgItem(IDC_Box01);
pWnd->SetWindowText(_T(""));
}

and it works wonderfully. I will try a few methods for my radio button select as well. Any suggestions on where I should begin? Thanks again.

[siavoshkc]

No its not the right way. Use m_Box01Ctl.SetWindowText(_T(""));

[meepokman]

Hi, I used your code and it worked as well. Saved me a lot of space in my program. Thanks a lot!!