Hi,

I am trying to add a multi column header in my application dynamically based on the data. I am facing an issue where once i add the multi column headers using group options the Header is not visible in the grid. 

GridModel ConsolidatedMargin = new GridModel();
var lstDistinctHeader = lstConsolidated.Select(x => x.txtHeader).Distinct().AsEnumerable();

foreach (var item in lstDistinctHeader)
{
int count = 0;
GridColumn grpCol = new GridColumn();
grpCol.HeaderText = item;
var lstconsolidatedFiltered = lstConsolidated.Where(a => a.txtHeader == item).ToList();
foreach (var item1 in lstconsolidatedFiltered)
{
string headerName = GetUntilOrEmpty(item1.txtHeader);
if (headerName == string.Empty)
{
headerName = AppConstants.Total + AppConstants.DASH + counter;
}
else
{
headerName = AppConstants.Pricing + AppConstants.DASH + counter + AppConstants.DASH + headerName;
}
counter++;

if (count == 0)
{
col = new GridColumn()
{
HeaderText = item,
Key = headerName,
Hidden = false
};
col.GroupOptions.Hidden = CollapsibleGroupHidden.ParentExpanded;
grpCol.Group.Add(col);
}
count++;
col = new GridColumn()
{
HeaderText = item,
Key = headerName,
Hidden = false
};
col.GroupOptions.Hidden = CollapsibleGroupHidden.ParentCollapsed;
grpCol.Group.Add(col);

}
grpCol.GroupOptions.AllowGroupCollapsing = true;
grpCol.GroupOptions.Expanded = false;
SampleGrid.Columns.Add(grpCol);
}
SampleGrid.PrimaryKey = "AssignedFor";
SampleGrid.AutoCommit = true;
SampleGrid.DataSource = dynamicLstForConsolidated.OrderBy(a => a.OrderBy).AsQueryable();
SampleGrid.AutoGenerateColumns = false;
SampleGrid.DefaultColumnWidth = "240px";
SampleGrid.Width = "100%";