Virtual mode problem

Virtual mode problem

Posted by: vikasbhutani on 10 May 2020, 11:28 pm EST

• 

  vikasbhutani

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  Posted 10 May 2020, 11:28 pm EST

  I am displaying default 500 no of rows using spread control 8.0 in VC++ (visual studio 2010 professional editon)
  
  where I am reading the records from sql data base and RecPtr refer to the same
  
  m_grigCtrl1.SetDataSource(RecPtr);
  
  m_grigCtrl1.SetMaxCols(2);
  
  while(!RecPtr->EndOfFile)
  
  {

  		vtValue=RecPtr->Fields->GetItem("ID")->GetValue();
  		lVaID = vtValue.lVal;
  		strTemp.Format(_T("%ld"), lVaID);
  		m_grigCtrl1.SetRow(r);
  		m_grigCtrl1.SetCol(c);
  		m_grigCtrl1.SetText(strTemp);
  		c++;
  		strTemp.Empty();
  
  		vtValue=RecPtr->Fields->GetItem("TextData")->GetValue();
  		strTextData = vtValue.bstrVal;
  		m_grigCtrl1.SetCol(c);
  		m_grigCtrl1.SetText(strTextData);
  		c++;
  		strTemp.Empty();
  		r++;
  		c=1;
  		RecPtr->MoveNext();
  	}
  

  m_grigCtrl1.DataRefresh();
  
  It is working fine.

  Bow I want to set the virtual mode , so I did the following:-
  
  m_grigCtrl1.SetVirtualOverlap(100);
  
  m_grigCtrl1.SetVirtualRows(50);
  
  m_grigCtrl1.SetVirtualMode(TRUE);
  
  m_grigCtrl1.SetVirtualScrollBuffer(TRUE);
  
  m_grigCtrl1.SetVScrollSpecial(TRUE);
  
  m_grigCtrl1s.SetVScrollSpecialType(VScrollSpecialNoPageUpDown);

  But, it is not working and displaying the garbage data, if I turned off code related to virtual mode, its working fine.

  What is wrong in the code?

• 

  Pragati.Kaushik

  

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  Posted 14 May 2020, 10:56 pm EST

  Hi Vikas,

  Can you please share a small working sample demonstrating this? I would like to investigate the problem further and discuss the issue with developers, if needed.

  Thanks.