GemBox.Spreadsheet is a .NET component that enables you to read, write, edit, convert, and print spreadsheet files from your .NET applications using one simple API.

Export Excel to XpsDocument in WPF

Following example shows how to convert an Excel workbook to XpsDocument instance in C# and VB.NET, and attach it to WPF's DocumentViewer control.

Screenshot
Export to XpsDocument / DocumentViewer Control Screenshot

See the full code below. 

<Window x:Class="ConvertToXpsDocumentCs.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Convert to XpsDocument Sample" 
        SizeToContent="WidthAndHeight">

    <DocumentViewer x:Name="DocumentViewer"/>

</Window>

using System.Windows;
using System.Windows.Controls;
using System.Windows.Xps.Packaging;
using GemBox.Spreadsheet;

namespace ConvertToXpsDocumentCs
{
    public partial class MainWindow : Window
    {
        XpsDocument xpsDocument;

        public MainWindow()
        {
            InitializeComponent();

            SetDocumentViewer(this.DocumentViewer);
        }

        private void SetDocumentViewer(DocumentViewer documentViewer)
        {
            SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");

            ExcelFile ef = new ExcelFile();

            var ws = ef.Worksheets.Add("Sheet1");

            ws.Cells[0, 0].Value = "English:";
            ws.Cells[0, 1].Value = "Hello";

            ws.Cells[1, 0].Value = "Russian:";
            ws.Cells[1, 1].Value = new string(new char[] { '\u0417', '\u0434', '\u0440', '\u0430', '\u0432', '\u0441', '\u0442', '\u0432', '\u0443', '\u0439', '\u0442', '\u0435' });

            ws.Cells[2, 0].Value = "Chinese:";
            ws.Cells[2, 1].Value = new string(new char[] { '\u4f60', '\u597d' });

            ws.Cells[4, 0].Value = "In order to see Russian and Chinese characters you need to have appropriate fonts on your PC.";
            ws.Cells.GetSubrangeAbsolute(4, 0, 4, 7).Merged = true;

            ws.HeadersFooters.DefaultPage.Header.CenterSection.Content = "Export To XpsDocument / DocumentViewer Control Sample";

            ws.PrintOptions.PrintGridlines = true;

            // XpsDocument needs to stay referenced so that DocumentViewer can access additional required resources.
            // Otherwise, GC will collect/dispose XpsDocument and DocumentViewer will not work.
            this.xpsDocument = ef.ConvertToXpsDocument(SaveOptions.XpsDefault);

            documentViewer.Document = this.xpsDocument.GetFixedDocumentSequence();
        }
    }
}
Imports System.Windows.Controls
Imports System.Windows.Xps.Packaging
Imports GemBox.Spreadsheet

Class MainWindow

    Dim xpsDocument As XpsDocument

    Public Sub New()
        InitializeComponent()

        SetDocumentViewer(Me.DocumentViewer)
    End Sub

    Private Sub SetDocumentViewer(documentViewer As DocumentViewer)

        SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

        Dim ef As New ExcelFile()

        Dim ws = ef.Worksheets.Add("Sheet1")

        ws.Cells(0, 0).Value = "English:"
        ws.Cells(0, 1).Value = "Hello"

        ws.Cells(1, 0).Value = "Russian:"
        ws.Cells(1, 1).Value = New String(New Char() {ChrW(&H417), ChrW(&H434), ChrW(&H440), ChrW(&H430), ChrW(&H432), ChrW(&H441), ChrW(&H442), ChrW(&H432), ChrW(&H443), ChrW(&H439), ChrW(&H442), ChrW(&H435)})

        ws.Cells(2, 0).Value = "Chinese:"
        ws.Cells(2, 1).Value = New String(New Char() {ChrW(&H4F60), ChrW(&H597D)})

        ws.Cells(4, 0).Value = "In order to see Russian and Chinese characters you need to have appropriate fonts on your PC."
        ws.Cells.GetSubrangeAbsolute(4, 0, 4, 7).Merged = True

        ws.HeadersFooters.DefaultPage.Header.CenterSection.Content = "Export To XpsDocument / DocumentViewer Control Sample"

        ws.PrintOptions.PrintGridlines = True

        ' XpsDocument needs to stay referenced so that DocumentViewer can access additional required resources.
        ' Otherwise, GC will collect/dispose XpsDocument and DocumentViewer will not work.
        xpsDocument = ef.ConvertToXpsDocument(SaveOptions.XpsDefault)

        documentViewer.Document = xpsDocument.GetFixedDocumentSequence()

    End Sub

End Class

Check next sample.