Thank you for the answer Stefan. That solves the first two items in my first post.

"As for the summary in each group, I can say that this is the default behavior of the XamGrid."

Is there a possibility to switch on and off the summaries per groups and summary over the whole grid independently?

This is possible in UltraGrid.

Show only the summaries for the whole grid: SummaryDisplayAreas.Bottom. Only for the GroupByRows: SummaryDisplayAreas.GroupByRowsFooter. For both: SummaryDisplayAreas.Bottom | SummaryDisplayAreas.GroupByRowsFooter.

Hello Burak,

I can suggest you set the BasedOn Property of the Styles you apply in code to the one I gave you. You can get the Style from the XAML like this:

e.Cell.Column.HeaderStyle = new Style(typeof(HeaderCellControl)) { BasedOn = LayoutRoot.Resources[typeof(HeaderCellControl)] as Style };

Please let me know if this helps you or you need further assistance on this matter.

Looking forward for your reply.

Hello Stefaan,

Thank you for your reply. I have included your code in my solution.

Hiding the sigma sign worked for most of the columns, but the styles of some headers are overridden in the code (cs file). For those columns, I still see the sigma sign.

In order to overcome this, I tried the following:

private const string __HeaderDropDownControlTemplate =
            //"<igPrim:HeaderDropDownControl AllowResizing=\"true\" x:Name=\"FilterHeaderDropDownControl\" Visibility=\"Collapsed\" Background=\"Transparent\" Grid.Column=\"2\">" +
            //"<igPrim:HeaderDropDownControl.OpenButtonContent>" +
            "<Grid Width=\"11\" Height=\"8\">" +
            "<Path" +
            "x:Name=\"clearFilterGlyphStroke\"" +
            "Width=\"11\"" +
            "Height=\"8\"" +
            "HorizontalAlignment=\"Center\"" +
            "VerticalAlignment=\"Center\"" +
            "Data=\"M 0,0 C0,0 11,0 11,0 11,0 7,4 7,4 7,4 7,8 7,8 7,8 4,8 4,8 4,8 4,4 4,4 4,4 0,0 0,0 z\"" +
            "Fill=\"{StaticResource HeaderCellGlyphBrush}\"" +
            "Stretch=\"Fill\"/>" +
            "<Path" +
            "x:Name=\"clearFilterGlyphFill\"" +
            "Width=\"7\"" +
            "Height=\"6\"" +
            "HorizontalAlignment=\"Center\"" +
            "VerticalAlignment=\"Center\"" +
            "Data=\"M 0,0 C0,0 7,0 7,0 7,0 4,3 4,3 4,3 4,6 4,6 4,6 3,6 3,6 3,6 3,3 3,3 3,3 0,0 0,0 z\"" +
            "Fill=\"#FFFFFFFF\"" +
            "Stretch=\"Fill\"/>" +
            "<Path" +
            "x:Name=\"redFilterGlyphFill\"" +
            "Width=\"7\"" +
            "Height=\"6\"" +
            "HorizontalAlignment=\"Center\"" +
            "VerticalAlignment=\"Center\"" +
            "Data=\"M 0,0 C0,0 7,0 7,0 7,0 4,3 4,3 4,3 4,6 4,6 4,6 3,6 3,6 3,6 3,3 3,3 3,3 0,0 0,0 z\"" +
            "Fill=\"{StaticResource FocusBrush}\"" +
            "Stretch=\"Fill\"" +
            "Visibility=\"Collapsed\"" +
            "/>" +
            "</Grid>"; // +
            //"</igPrim:HeaderDropDownControl.OpenButtonContent>" +
            //"<igPrim:FilterSelectorControl Height=\"370\" Width=\"250\" MinWidth=\"250\" MinHeight=\"370\" HorizontalContentAlignment=\"Stretch\" VerticalContentAlignment=\"Stretch\"  Cell=\"{Binding Path=Cell,RelativeSource={RelativeSource TemplatedParent}}\"></igPrim:FilterSelectorControl>" +
            //"</igPrim:HeaderDropDownControl>";

Then in a method:

                var headerTemplate = string.Format(__RegisterHeaderTemplate, text, fontSize);
                column.HeaderTemplate = (DataTemplate)XamlReader.Load(headerTemplate);

                var overrideStyle = new Style(typeof(HeaderCellControl));
                overrideStyle.Setters.Add(new Setter(HeaderCellControl.MarginProperty, "0"));
                overrideStyle.Setters.Add(new Setter(HeaderCellControl.PaddingProperty, "0,0"));

// line added by me:
                overrideStyle.Setters.Add(new Setter(HeaderDropDownControl.OpenButtonContentProperty, __HeaderDropDownControlTemplate));
                
                column.HeaderStyle = overrideStyle;

This did not have the impact I wanted. So, I want to use a technique similar to the one above and address the issue in the viewmodel side.

Can you suggest a solution where I can make this partial modifications via Setters in the cs side?