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Hi,

I used CExtReportGrid class to generate the reports. I have several columns in report. Now, if I remove some columns then when I generate report again then those removed column should not be there. But, currently it is not happening. I saw prof-uis sample project of reportgrid. In which it is like that(If i remove columns then again when I start reportgrid project the removed columns were not there.) So how to do this?

Yes, you can use the system registry for saving the state of the report grid control before print/preview generation and loading after. The CExtReportGridWnd::ReportGridStateSave() and CExtReportGridWnd::ReportGridStateLoad() methods does this work. Alternatively you can use the CExtReportGridWnd::ReportGridStateSerialize() method and the CArchive streams created over the CMemFile object.

Hi,

What is the difference between two methods? & which one is better?

The CExtReportGridWnd::ReportGridStateSave() and CExtReportGridWnd::ReportGridStateLoad() methods are designed for saving/loading state of the report grid control to/from the specified location in the system registry.
The CExtReportGridWnd::ReportGridStateSerialize() method saves/loads state of the report grid control to/from the CArchive stream.
The first two methods are based on third because they are creating CArchive and CMemFile objects and then invoke the CExtReportGridWnd::ReportGridStateSerialize() method.
You can use any variant you like.

The printing/previewing subsystem of the CExtReportGridWnd class uses only active report columns. So, you should activate required set of columns before entering printing/previewing. You should implement the CExtPPVW_Printable::OnPreparePrinting() virtual method in your CExtPPVW < CExtReportGridWnd >-derived class:

BOOL CYourReportGridWndClass:: OnPreparePrinting( CPrintInfo * pInfo )
{
//
// activate/deactivate required columns here
// (use the CExtReportGridWnd::ReportColumnIsActive() and CExtReportGridWnd::ReportColumnActivate() methods)
//
BOOL bRetVal = CExtPPVW < CExtReportGridWnd > :: OnPreparePrinting( pInfo );
//
// restore previously active columns here
//
return bRetVal;
}

HI,

But i saw Prof-Uis sample code for reports. In which you have not used CExtPPVW_Printable::OnPreparePrinting().

What I want is, I have several columns in my report. Some of them are initially active & some are Inactive. Now, once I generate report & then remove some columns or add any columns from column Chooser then close the report & then again when I generate the report it should be like the last state of report.(Means removed columns should not be there & added columns should be there). Are you storing this info in registry?