Mail Merge with CustomMergeField

[band]

Hi, I am successfully able to display the custom merge field(inserts a table into the document) into my RadDocument. The problem I come across is that when I try to save or mail merge I am presented with an error

at Telerik.Windows.Documents.Layout.LayoutBox.InvalidateMeasure()
at Telerik.Windows.Documents.Layout.LayoutBox.InvalidateMeasureUpToTheRoot()
at Telerik.Windows.Documents.Layout.LayoutBox.OnAssociateDocumentElementChangedCore()
at Telerik.Windows.Documents.Layout.LayoutBox.set_AssociatedDocumentElement(DocumentElement value)

Am I doing anything wrong while creating a MergeField? Is the xamlserializer causing the error?

public class CustomMergeField : MergeField
{
    private const string CustomFieldName = "CustomField";

    static CustomMergeField()
    {
        CodeBasedFieldFactory.RegisterFieldType(CustomMergeField.CustomFieldName, () => { return new CustomMergeField(); });
    }

    public override string FieldTypeName
    {
        get
        {
            return CustomMergeField.CustomFieldName;
        }
    }

    public override Field CreateInstance()
    {
        return new CustomMergeField();
    }

    protected override DocumentFragment GetResultFragment()
    {
        UniversalDTO universalDTO = this.Document.MailMergeDataSource.CurrentItem as UniversalDTO;
        if (universalDTO == null)
        {
            return null;
        }

        if (this.PropertyPath == "Collaterals")
        {
            Table table = new Table();

            foreach (var coillateral in universalDTO.Collaterals)
            {
                Span span = new Span(coillateral.Type.Value);
                span.FontSize = 11.5;
                Paragraph paragraph = new Paragraph();
                paragraph.Inlines.Add(span);

                Span span2 = new Span(coillateral.Description);
                span2.FontSize = 11.5;
                Paragraph paragraph2 = new Paragraph();
                paragraph2.Inlines.Add(span2);

                TableCell cell = new TableCell();
                cell.Blocks.Add(paragraph);
                cell.Borders = new TableCellBorders(new Border(1, BorderStyle.Single, Colors.Transparent));

                TableCell cell2 = new TableCell();
                cell2.Blocks.Add(paragraph2);
                cell2.Borders = new TableCellBorders(new Border(1, BorderStyle.Single, Colors.Transparent));

                TableRow row = new TableRow();
                row.Cells.Add(cell);
                row.Cells.Add(cell2);
                table.AddRow(row);
            }

            Section section = new Section();
            section.Blocks.Add(table);

            RadDocument document = new RadDocument();
            document.Sections.Add(section);

            document.MeasureAndArrangeInDefaultSize();
            return new DocumentFragment(document);
        }

        return null;
    }
}

[band]

I've built a sample project of the  

* Edited by administrator *

[band]

After looking deep into this, it looks like it will only fail when you try to mail merge when it's in preview result mode.

[Tanya]

Hello,

The issue you are observing is already fixed in the newer versions of the control. The only thing I can suggest you is to upgrade the controls you are using to a newer version.

Your post has been edited as the project you shared contains binaries from the suite. We have to avoid publishing the dev assemblies in publicly accessible sites as they are distributed with a license per developer seat.

Regards,
Tanya
Telerik by Progress