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Hi Mike,

As to my original issue further testing lead to the conclusion that only the CSV export was having issues and it turned out that was going off into another of our functions for pre-processing which didn't take into account the hidden columns! So user error on our part, not a bug or even anything to do with the Infragistics part of the code in the end :-)

As an aside my thanks for confirming that the Layout that is passed into these events is a clone of the grid's DisplayLayout as this has just helped out a colleague reduce the amount of code he needed to use in his work with similar export code on another of our products.

Amiram,

Thanks for getting me on the right track with the correct event handlers to start with, all is working now.

Regards,

Simon G

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The Layout that is passed into these events is a clone of the grid's DisplayLayout and modifying that layout will affect the exported/printed results.

The only reason I can think of why this would not work is that the field names are not being found and so the code which hides the columns is never getting hit.

Thanks for your reply Amiram, I've put together the following event handlers for this but am having no joy:

        Private Shared Sub Exporter_BeginExport(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.DocumentExport.BeginExportEventArgs) Handles mobjUltraGridDocumentExporter.BeginExport
            Hide_Columns(e.Layout)
        End Sub

        Private Shared Sub mobjUltraGridExcelExporter_BeginExport(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.ExcelExport.BeginExportEventArgs) Handles mobjUltraGridExcelExporter.BeginExport
            Hide_Columns(e.Layout)
        End Sub

Which then call:

        Private Shared Sub Hide_Columns(ByRef objDisplay_Layout As Infragistics.Win.UltraWinGrid.UltraGridLayout)

            For Each objBand In objDisplay_Layout.Bands
                For Each strFieldName In mstrHidden_Fields
                    If objBand.Columns.Exists(strFieldName) Then
                        objBand.Columns(strFieldName).Hidden = True
                    End If
                Next
            Next

        End Sub

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I must be missing something because the Hidden property seems to have no impact on if the column is visible in the export. In this test case i use CSV as the target export format since it is easier to verify the results for hiding columns at the end of the grid than in XLS format.

Anyone any ideas?

Is the instance of the grid you get in the event args the same as the underlying grid or is it a clone in the same way I understand that printing makes a clone of your grid for printing only. If so I can always get round this by removing the columns but I would of thought this should not be needed!

Any help gratefully appreciated