I have a XamGrid with a number of UnboundColumn columns, each with a value converter.  The correct values are being displayed on screen.

When I use XamGridExcelExporter to export to an excel file, the value converter is not called, and the "ToString" function of the row is exported in each cell.

Here is a cut-down version of the code I am using to build up the grid and export to excel.

<ig:XamGrid x:Name="SortableGrid"
Grid.Row="1"
AutoGenerateColumns="False"
CellStyle="{StaticResource SummaryCellStyle}"
ItemsSource="{Binding Rows}"
>
<ig:XamGrid.SortingSettings>
<ig:SortingSettings AllowSorting="True"/>
</ig:XamGrid.SortingSettings>
<ig:XamGrid.FilteringSettings>
<ig:FilteringSettings AllowFiltering="FilterMenu"/>
</ig:XamGrid.FilteringSettings>
<ig:XamGrid.ConditionalFormattingSettings>
<ig:ConditionalFormattingSettings AllowConditionalFormatting="True"/>
</ig:XamGrid.ConditionalFormattingSettings>
<ig:XamGrid.Columns >
<ig:UnboundColumn Tag="Display something while we wait for data to load"
Key="StudentName" x:Uid="StudentNameColumn" IsFixed="Left" HeaderText="~Student"/>
</ig:XamGrid.Columns>

</ig:XamGrid>

public void BuildHeaders()
{
int index = 0;
SortableGrid.Columns.Clear();
foreach (var resultHeader in ViewModel.Results.Headers)
{
var column = new UnboundColumn
{
Key = resultHeader.Id ?? index.ToString(),
HeaderText = resultHeader.Display,
ValueConverter = new SelectResultCell(index),
MinimumWidth = 150,
};
if (index == 0)
column.IsFixed = FixedState.Left;
index++;

SortableGrid.Columns.Add(column);
}

SortableGrid.GroupBySettings = new GroupBySettings { AllowGroupByArea = GroupByAreaLocation.Top };
}

private async void OnExportExcelClick(object sender, RoutedEventArgs e)
{
var workbook = new Workbook();
workbook.SetCurrentFormat(WorkbookFormat.Excel2007);

var exporter = new XamGridExcelExporter
{
ExcludeColumnValueConverter = false
};
exporter.Export(SortableGrid, workbook);

var savePicker = new FileSavePicker();
savePicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;

savePicker.FileTypeChoices.Add("Excel Workbook", new List<string>() { ".xlsx" });
savePicker.DefaultFileExtension = ".xlsx";

savePicker.SuggestedFileName = "Workbook1";
var file = await savePicker.PickSaveFileAsync();
if (file == null) return;

using (var stream = await file.OpenStreamForWriteAsync())
{
workbook.Save(stream);
}

Launcher.LaunchFileAsync(file);
}