Forums Ultimate UI for Windows Forms
Your Privacy Matters: We use our own and third-party cookies to improve your experience on our website. By continuing to use the website we understand that you accept their use. Cookie Policy
Close
Jason Plank
185
Group By Question
posted

All,

Is there a way in the 9.1 UltraWinGrid to automatically expand all rows when the user groups by a new column.  My users want the grid to automatically expand all rows whenever they drag/drop a column header to the "Group By" box.  Is there a property or an event I can trap that allows me to know when this happens?  I thought that the "AfterSortChange" event might work, but it tells me the band that changed and not necessarily the column...

Thanks,
Jason

Parents
No Data
Reply
  • 469350
    Verified Answer
    Offline posted

    Hi Jason,

    You can keep track of the number of grouped columns in the BeforeSortChange, then see if it increased in the AfterSortChanged. 

    


            int groupedColumnsCount = 0;
            private void ultraGrid1_BeforeSortChange(object sender, BeforeSortChangeEventArgs e)
            {            
                this.groupedColumnsCount = 0;
                foreach (UltraGridColumn column in e.Band.SortedColumns)
                {
                    if (column.IsGroupByColumn)
                        groupedColumnsCount++;
                }
            }

            private void ultraGrid1_AfterSortChange(object sender, BandEventArgs e)
            {
                int newGroupedColumnsCount = 0;
                foreach (UltraGridColumn column in e.Band.SortedColumns)
                {
                    if (column.IsGroupByColumn)
                        newGroupedColumnsCount++;
                }

                if (newGroupedColumnsCount > this.groupedColumnsCount)
                {
                    UltraGrid grid = (UltraGrid)sender;
                    grid.Rows.ExpandAll(true);
                }
            }

     

    Actually, since BeforeSortChanged gives you both the band and the new SortedColumns, you could potentially count both in BeforeSortChanged and then just set a flag to expand everything in AfterSortChanged. But it doesn't really make much difference.

Children