private void BrowseButton_Click(object sender, RoutedEventArgs e) { Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog(); dlg.DefaultExt = ".xls|.xlsx"; dlg.Filter = "(.xls)|*.xls|(.xlsx)|*.xlsx"; Nullable result = dlg.ShowDialog(); if (result == true) { if (dlg.FileName.Length > 0) { SelectedFileTextBox.Text = dlg.FileName; string newXPSDocumentName = String.Concat(System.IO.Path.GetDirectoryName(dlg.FileName), "\\", System.IO.Path.GetFileNameWithoutExtension(dlg.FileName), ".xps"); documentViewer1.Document = ConvertExcelToXPSDoc(dlg.FileName, newXPSDocumentName).GetFixedDocumentSequence(); } } } private XpsDocument ConvertExcelToXPSDoc(string excelDocName, string xpsDocName) { Microsoft.Office.Interop.Excel.Application excelApplication = new Microsoft.Office.Interop.Excel.Application(); Workbook excelWorkbook = excelApplication.Workbooks.Open(excelDocName); try { excelWorkbook.ExportAsFixedFormat(XlFixedFormatType.xlTypeXPS,Filename: xpsDocName, OpenAfterPublish: false); excelApplication.Quit(); XpsDocument xpsDoc = new XpsDocument(xpsDocName, System.IO.FileAccess.Read); return xpsDoc; } catch (Exception exp) { string str = exp.Message; } return null; }