[MFC development (17)] advanced list control list control

1. Introduce

ListCtrl Advanced list control is also a common control in our usual programming process , It generally involves report presentation 、 Record and display , Need to be ListCtrl Advanced list control . for example ： Task manager , File list , And so on ListCtrl Advanced list control .

 

Introduction to common attributes ：

Edit Lables Whether the node can be edited

 

View Used to set the style of advanced list controls , There are four styles

Icon： For each item Show large icons

Small Icon： For each item Show small icons

List： Displays a list of... With small icons item

Report： Show item Detailed information

2. Common methods

（1） First, add variables to the control

 

 （2） Set extended style

// Get an extended style 
	DWORD  style = m_listctrl.GetExtendedStyle();
	// Add the style of gridline and the style selected in the whole row, and add a selection box in front 
	style |= LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT|LVS_EX_CHECKBOXES;
	// Set extended style 
	m_listctrl.SetExtendedStyle(style);

（3） Add columns

// Add columns ,0--- Serial number , The second parameter shows the content ,
	// The third parameter shows the alignment , The fourth parameter is the width displayed in the header 
	m_listctrl.InsertColumn(0, _T(" First column "), LVCFMT_CENTER, 50);
	m_listctrl.InsertColumn(1, _T(" Second column "), LVCFMT_CENTER, 50);
	m_listctrl.InsertColumn(2, _T(" The third column "), LVCFMT_CENTER, 50);

（4） Add lines and line contents

// Insert line contents 
	// Add to the end 
	m_listctrl.InsertItem(m_listctrl.GetItemCount(),_T(" first line "));
	// You can set the contents of a row and a column , The parameters are row , Column , Text content 
	m_listctrl.SetItemText(0,0, _T("111"));
	m_listctrl.SetItemText(0,1, _T("222"));
	m_listctrl.SetItemText(0,2, _T("333"));

（5） Set to select a row and uncheck

Choose

void CMFC_Test1Dlg::OnBnClickedButton21()
{
	// TODO:   Add control notification handler code here 
	// Set highlight 
	m_listctrl.SetFocus();
	// Set to select a row 
	m_listctrl.SetItemState(1, LVIS_SELECTED | LVIS_FOCUSED, LVIS_SELECTED | LVIS_FOCUSED);
}

  Uncheck the selected

void CMFC_Test1Dlg::OnBnClickedButton24()
{
	// TODO:   Add control notification handler code here 
	m_listctrl.SetItemState(1,0, LVIS_SELECTED | LVIS_FOCUSED);
}

（6） Traverse every line in the control

void CMFC_Test1Dlg::OnBnClickedButton25()
{
	// TODO:   Add control notification handler code here 
	// First, get how many rows 
	int ncount = m_listctrl.GetItemCount();
	// Go through every line 
	for (int i = 0; i < ncount; i++){
		// Single acquisition i+1 First column of row 、 Second column 、 The third column 
		CString str1 = m_listctrl.GetItemText(i, 0);
		CString str2 = m_listctrl.GetItemText(i, 1);
		CString str3 = m_listctrl.GetItemText(i, 2);
	}
}

（7） Get the selected row

// Get the currently selected row 
	// First get the position 
	POSITION pos = m_listctrl.GetFirstSelectedItemPosition();
	while (pos){
		// Get the index of the selected row according to the position 
		int row_idx = m_listctrl.GetNextSelectedItem(pos);
		CString str_idx;
		str_idx.Format(_T("%d"), str_idx);
		MessageBox(str_idx);
	}

（8） Get the row selected in the multiple check box

void CMFC_Test1Dlg::OnBnClickedButton26()
{
	// TODO:   Add control notification handler code here 
	// First, get how many rows 
	int ncount = m_listctrl.GetItemCount();
	// Go through every line 
	for (int i = 0; i < ncount; i++){
		BOOL bcheck = m_listctrl.GetCheck(i);
		if (bcheck){
			CString check_idx;
			check_idx.Format(_T(" The first %d Line is checked "), i);
			MessageBox(check_idx);
		}
	}
}

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 （9） Delete row

void CMFC_Test1Dlg::OnBnClickedButton27()
{
	// TODO:   Add control notification handler code here 
	// Delete a line 
	m_listctrl.DeleteItem(0);
	// Delete all rows 
	m_listctrl.DeleteAllItems();
}

Note that after deleting a row , The index of all remaining rows will change , For example, delete 0 That's ok , Then delete 1 The line has changed. 0 That's ok

（10） Edit the specified line text

It should be noted that you should make it editable , Need to set the control property clock Edit Labels by True

First, add two events , Start and end editing

void CMFC_Test1Dlg::OnLvnBeginlabeleditList2(NMHDR *pNMHDR, LRESULT *pResult)
{
	NMLVDISPINFO *pDispInfo = reinterpret_cast<NMLVDISPINFO*>(pNMHDR);
	// TODO:   Add control notification handler code here 
	*pResult = 0;
}


void CMFC_Test1Dlg::OnLvnEndlabeleditList2(NMHDR *pNMHDR, LRESULT *pResult)
{
	NMLVDISPINFO *pDispInfo = reinterpret_cast<NMLVDISPINFO*>(pNMHDR);
	// TODO:   Add control notification handler code here 
	// The three parameters are rows in turn , Column , Input content 
	m_listctrl.SetItemText(pDispInfo->item.iItem, pDispInfo->item.iSubItem, pDispInfo->item.pszText);
	*pResult = 0;
}

Note that you can only edit （ The index for 0 Of ） The first 1 Column text , Other columns cannot be edited .