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Megumi
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UltraWinGrid: Select All GroupBy and Data Rows
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Hello,

I have a UltraWinGrid which has at least one GroupBy column (Outlook Group By).  I want to select all GroupByRows and Data rows on the grid (Even the ones invisible.  I have a function to export the selected rows to excel).  I have problems with selecting ChildBand's (lower level GroupByRows and Data rows).

I can select the first level GroupByRows by this.

theUltraGrid.Selected.Rows.AddRange(theUltraGrid.Rows.All)

 

However, I get 'NullReferenceException' when I try to add ChildBand's rows to SelectedRows.

I am doing something like this. (In the real code I do it recursively)

theUltraGrid.Selected.Rows.AddRange(theUltraGrid.Rows(0).ChildBands(0).Rows.All)

I get the following exception.

{"Object reference not set to an instance of an object."} at Infragistics.Win.UltraWinGrid.Selected.SelectionPositionSortComparer.CompareRow(UltraGridRow rowX, UltraGridRow rowY) ...

I tried it in several different ways but I always get the same exception.  I am wondering if my code has problems or the way I do is completely wrong.  Please give me advice.

 Thanks!

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  • 469350
    Verified Answer
    Offline posted

    There are two problems here.

    First, you cannot select rows on more than one level at a time. This means you cannot select a GroupByRow and one of it's child rows at once. If you select a child rows, the GroupByRow will be de-selected. 

    I think the second issue is with how you are getting the child rows. If the grid is grouped, then theUltraGrid.Rows(0) will be a GroupByRow. A GroupByRow will never have a ChildBands collection. ChildBands only exist on data rows. What you need to do is cast the row into an UltraGridGroupByRow and use the Rows collection to get it's child rows.

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