C / C++ / MFC

George_George wrote:

but how will reserve improve the performance of insert?

Matthew Faithfull wrote:

In general if you're working with a larger number of items but only 1 at a time, adding and deleting more or less at random then reserving will give you the greatest performance gain.

Matthew Faithfull wrote:

If you're performing entirely linear operations, add 10,000 items, then iterate over them a few times in order, then free them, it will give you very little or nothing.

Who am I, I don't Know wrote:

I have tried using CHttpConnection of MFC(wininet)

int tLen = m_Combo1.GetLBTextLen(m_Combo1.GetCurSel());<br />
m_Combo1.SetEditSel(tLen,tLen);

SnaKeBeD wrote:

But it was not working...

<br />
void CMFC1Dlg::OnCombo1EditChange()<br />
{<br />
   // Here you should do or call the process to look for text on the DB <br />
   // and modify the ComboBox item list and text <br />
   <br />
   //for this examle<br />
   //Here I get the text entered and compare it whit a fixed text "New"<br />
   //If the user entered "New" and not exists the item "New Element" in<br />
   //the combo list, I add de element<br />
   //then select the "New Element" item as the current selected item<br />
   // Set the cursor at the end of the element<br />
   // <br />
   // For a real use, I think, is better select the text since the <br />
   // last entered character to the end of the text<br />
   // <br />
   CString UserText;<br />
   TCHAR AddText[12] = _T("New Element");<br />
   CWnd * pEdit = m_Combo1.GetWindow( GW_CHILD ); <br />
   ASSERT( pEdit );<br />
   pEdit->GetWindowText(UserText);<br />
   if ( UserText.Compare(_T("New"))==0)<br />
   {<br />
      if (m_Combo1.FindString(-1,&AddText[0])==CB_ERR ) <br />
      {<br />
         m_Combo1.AddString(&AddText[0]);<br />
         m_Combo1.SetCurSel(m_Combo1.FindString(-1,&AddText[0]));<br />
      }<br />
      int tLen = m_Combo1.GetLBTextLen(m_Combo1.GetCurSel());<br />
      m_Combo1.SetEditSel(tLen,tLen); <br />
   }<br />
}<br />
<br />