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Adding "Merge cells" support to the MFC GridControl

, 29 Dec 2002
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Adding "Merge cells" support to the MFC GridControl.

Sample Image - gridcontrl.jpg

Sample Image - print.jpg


This example demonstrates how to add "merge cells" ability to Chris Maunder's MFC Grid control (derived from CWnd).

The example modifies only two classes: CGridCellBase and CGridCtrl. In the class CGridCellBase ,the following four private member variables are added:

CCellRange m_MergeRange;
bool m_IsMergeWithOthers;
CCellID m_MergeCellID;
bool m_Hide;

Six public member functions are also added:

void UnMerge();
virtual bool IsShow() ;
virtual CCellRange GetMergeRange();
virtual bool IsMergeWithOthers();
virtual CCellID GetMergeCellID();
virtual void SetMergeCellID(CCellID cell);

In the class CGridCtrl, the following six public member functions are added:

CGridCellBase* GetCell(CCellID cell);
CCellID GetMergeCellID(CCellID cell);
void UnMergeSelectedCells();
void MergeSelectedCells();
void UnMergeCells(int nStartRow, int nStartCol, int nEndRow, int nEndCol);
void MergeCells(int nStartRow, int nStartCol, int nEndRow, int nEndCol);


  • Use CGridCtrl::MergeSelectedCells() and MergeCells() to merge the selected cells;
  • Use CGridCtrl::UnMergeSelectedCells() and UnMergeCells() to restore the selected cell to its original state.


  • 1.7 fixed the bug when merging in the corner, by Luther Bruck - 2002/12/31
  • 1.6 fixed the bug when resizing the merged row - 2002/11/20
  • 1.5 fixed the bug when resizing the merged column - 2002/11/18
  • 1.4 bug when printing merge cell across pages fixed - 2002/10/10
  • 1.3 fixed cells merge added - 2002/9/27
  • 1.2 print bug fixed - 2002/9/23
  • 1.1 scroll bug fixed - 2002/9/18
  • 1.0 first release - 2002/9/15

(Note that users of the Grid control are bound by Chris' copyright requirements detailed on his web page.)


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Huang Wei
Web Developer
China China
He got Master degree of Theory and Application of Automatic Control from Tsinghua university(Beijing,China) in 1997,from then on he has been working for Tsinghua TongFang Software Co.Ltd,Beijing China.

Comments and Discussions

BugMergeCell Sort PinmemberMember 1038662910-Feb-15 19:38 
GeneralMy vote of 5 PinmemberFaint789020-Apr-13 23:01 
Questionset color of tool bar button text PinmemberUday P.Singh16-Feb-12 2:57 
GeneralDrawing issue in merging cell PinmemberMember 304756327-May-11 4:19 
GeneralSetItemBkColour function will make grid line disappear Pinmemberzhuguo30-Jun-09 2:06 
GeneralMerged cell disapears while sorting PinmemberTanmaySathe17-Feb-09 19:14 
QuestionHow can i generate a DLL and an OCX file for this code in your attachment? Pinmemberpraveen_sap25-Jan-09 12:55 
General[Message Removed] Pinmemberimmetoz6-Oct-08 8:55 
Questionunable to download the attachment file PinmemberG Haranadh30-Jul-08 3:48 
Generalprint probs Pinmemberzhkingsmac7-Jul-08 17:35 
Generalin virtual mode, merge cells function doesn't work properly PinmemberMember 46478006-Mar-08 22:02 
QuestionPrintCell is wrong Pinmemberandrewtruckle5-Aug-07 21:06 
AnswerRe: PrintCell is wrong Pinmemberandrewtruckle5-Aug-07 23:01 
QuestionHow to save the merged grid infomation?? Pinmemberhhuwangzhp198026-Jun-07 19:01 
GeneralAdding a BITMAP Pinmemberhodeck~10-Sep-06 21:08 
QuestionHas anyone got this working properly in v2.26 ? Pinmemberjfougero4-Sep-06 18:05 
AnswerRe: Has anyone got this working properly in v2.26 ? Pinmemberhamo200827-Nov-06 21:05 
AnswerRe: Has anyone got this working properly in v2.26 ? PinmemberMember 382164027-Jun-08 0:56 
Generalbug: Merge the merged cells --fixed Pinmemberhamo200826-Jul-06 6:40 
GeneralRe: bug: Merge the merged cells --fixed Pinmembercuiting9-Dec-12 23:18 
GeneralProblem deleting rows Pinmemberandrewtruckle8-Jun-06 2:39 
GeneralRe: Problem deleting rows Pinmemberandrewtruckle8-Jun-06 4:53 
GeneralRe: Problem deleting rows - FIXED! Pinmemberandrewtruckle9-Jun-06 4:01 
GeneralAutoSizeColumn problem Pinmemberandrewtruckle24-May-06 22:04 
GeneralClicking on a merged cell and moving by keyboard to merged cell Pinmemberandrewtruckle23-May-06 22:49 
GeneralRe: Clicking on a merged cell and moving by keyboard to merged cell - Solution Pinmemberandrewtruckle24-May-06 0:24 
GeneralAdd MergeCell function with CGridCtrl2.25 PinmemberMajorVon11-Aug-05 23:09 
GeneralRe: Add MergeCell function with CGridCtrl2.25 Pinmemberandrew.truckle@atkinsglobal.com19-Sep-05 1:42 
Questionautosize merged cells? Pinmembermarkoot28-Jul-05 11:19 
If i have text in cell (1,1) and i merged cells (1,1,1,7)
and when my text is too big for cell (1,1) AutoSize function resizes my (1,1) cells, but my text isn't too big for merged cells (1,1,1,7) (i mean there is a lot of place in whole row which is merged as one cells)$;
Better for me would be AutoSize also for merge cells.
Hmm, i will try to draw mky problem;
I have :
|MyBigText___| <-this one is merged
After using AutoSize i have
Column number 0 shouldn't be resized
// ___ means spacebar
Somebody helps me?
Thanks a lot.
//I hope i will be understood
GeneralI fixed the bug that it can't show the last line of grid. Pinmembervictor_zhao10-Jul-05 23:07 
Generalcannot downlaod the demo Pinmembermanjuvk9-Apr-05 20:35 
GeneralVirtual Mode PinmemberTimPreuss5-Jan-05 3:32 
Generalword wrapping Pinmemberandrew.truckle@atkinsglobal.com7-Oct-04 4:47 
GeneralRe: word wrapping PinmemberIce137421-May-06 6:45 
GeneralRe: word wrapping Pinmemberandrewtruckle21-May-06 9:14 
QuestionCan I have Tree Cells and merged cells on the same grid PinsussRafael Melo13-Sep-04 10:45 
QuestionHow to print MFC GridControl ? Pinmemberlzs14-Aug-04 18:10 
GeneralI can't download the source files. PinsussTommyChoi18-Jun-04 19:59 
General2.25version PinmemberDarter27-Apr-04 2:24 
GeneralRe: 2.25version Pinmemberigrzalja30-Aug-04 5:33 
GeneralRe: 2.25version Pinmemberandrew.truckle@atkinsglobal.com19-Sep-05 1:46 
GeneralRe: 2.25version Pinmemberqz_yc_kj13-Nov-05 4:37 
GeneralRe: 2.25version Pinmemberhomerhuang21-Feb-06 18:42 
GeneralRe: 2.25version Pinmembermikewolfli25-Apr-06 23:32 
GeneralProblem with Scrolling PinmemberJIJESH.G1-Mar-04 2:16 
GeneralRe: Problem with Scrolling PinsussKiato L.6-Aug-04 2:49 
GeneralProblem with printing merging cells in fixed columns Pinmemberwlegierski2-Dec-03 2:29 
GeneralRe: Problem with printing merging cells in fixed columns Pinmemberyuhonggang27-Nov-04 6:02 
GeneralRe: Problem with printing merging cells in fixed columns PinmemberCui Sheng14-Feb-05 23:15 
GeneralProblem when changing cell colors PinmemberJAlcant12327-Oct-03 13:30 

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