Export xml data to Excel using OpenXML

Question

The file is downloading an xlsx file but when i tried to open the file it is saying file is corrupted. Here is the code i'm trying to use please let me know if any changes has to be done for the following.

private void button1_Click(object sender, EventArgs e)
{
    ArrayList DataNode = new ArrayList();
    XmlDocument xmlobj = new XmlDocument();
    ArrayList FinalXML = new ArrayList();
    XslCompiledTransform xXslt = new XslCompiledTransform();
    xmlobj.Load(@"D:\ExcelImport\Input.xml");
    xXslt.Load(@"D:\ExcelImport\demoxsl.xslt");
    XmlNodeList DN ;
    DN = xmlobj.DocumentElement.GetElementsByTagName("Data");
    for (int i = 0; i < DN.Count; i++)
    {
        DataNode.Add("<ShaleDataExport><Data Flag = '" + i + "' >" + DN.Item(i).InnerXml + "</Data></ShaleDataExport>");    
    }
    string ShaleDataExportXML;
    int k = 0 ;
    while (k < DN.Count)
    {
        ShaleDataExportXML = DataNode[k].ToString();
        XmlDocument xml =  new XmlDocument();
        xml.LoadXml(ShaleDataExportXML);
        StringWriter sw = new StringWriter();  
        xXslt.Transform(xml, null, sw);
        FinalXML.Add(sw);
        sw.Close();
        k++;
    }
    using (SpreadsheetDocument doc = SpreadsheetDocument.Create(@"D:\ExcelImport\OutPut\OutPut.xlsx", DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
    {
        WorkbookPart workbook = doc.AddWorkbookPart();
        string XML;
        string WorbookXML;
        WorbookXML = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes""?><workbook xmlns=""schemas.openxmlformats.org/.../main"" xmlns:r=""schemas.openxmlformats.org/.../relationships""><sheets>";
        for (int j = 0; j < DN.Count; j++)
        {
            WorksheetPart[] sheet = new WorksheetPart[DN.Count];
            sheet[j] = workbook.AddNewPart<WorksheetPart>();
            string sheetId = workbook.GetIdOfPart(sheet[j]);
            XML = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes""?><worksheet xmlns=""schemas.openxmlformats.org/.../main"" >";
            XML += FinalXML[j].ToString() + "</worksheet>";
            string SheetXML = XML.ToString();
            XmlDocument SXML = new XmlDocument();
            SXML.LoadXml(SheetXML);
            byte[] byteArray = Encoding.ASCII.GetBytes(SXML.OuterXml);
            MemoryStream stream = new MemoryStream(byteArray);
            StreamReader reader = new StreamReader(stream);
            string text = reader.ReadToEnd();
            WorbookXML += "<sheet name="+ AddPartXml(sheet[j], text) + " sheetId=" + j.ToString() + "  r:id=" + sheetId.ToString() + " />";
        }
        WorbookXML += "</sheets></workbook>";
        AddPartXml(workbook, WorbookXML);
        doc.Close();
    }
}
public string  AddPartXml(OpenXmlPart part, string xml)
{
    Uri uri = part.Uri;
    String[] sheetNames = uri.OriginalString.Split('/');
    string sheetName = sheetNames[sheetNames.Length - 1].Split('.')[0];
    using (Stream stream = part.GetStream())
    {
        byte[] buffer = (new UTF8Encoding()).GetBytes(xml);
        stream.Write(buffer, 0, buffer.Length);
    }
    return sheetName;
}

Thanks in advance

Vineet Mangal

Answer 1

        private void button1_Click(object sender, EventArgs e)
        {
            XmlDocument xmlobj = new XmlDocument();
            xmlobj.Load(@"C:\Excel Import\\Input.xml");
            XslCompiledTransform xXslt = new XslCompiledTransform();
            xXslt.Load(@"C:\ExportToexcel\Data.xslt");

            StringWriter sw = new StringWriter();

            xXslt.Transform(xmlobj, null, sw);
            richTextBox2.Text = sw.ToString();
            sw.Close();
            XmlDocument Xdoc = new XmlDocument();
            Xdoc.LoadXml(sw.ToString());
            Xdoc.Save(@"c:\temp\output.xml");
            StreamReader sr = File.OpenText(@"c:\temp\output.xml");

            string strSheetData = sr.ReadToEnd();
            ArrayList DataNode = new ArrayList();
            ArrayList FinalXML = new ArrayList();
            XmlNodeList DN;
            DN = xmlobj.DocumentElement.GetElementsByTagName("Data");
            for (int i = 0; i < DN.Count; i++)
            {
                DataNode.Add("<ShaleDataExport><Data Flag = '" + i + "' >" + DN.Item(i).InnerXml + "</Data></ShaleDataExport>");

            }
            string ShaleDataExportXML;
            int k = 0;
            while (k < DN.Count)
            {
                ShaleDataExportXML = DataNode[k].ToString();
                XmlDocument xml = new XmlDocument();
                xml.LoadXml(ShaleDataExportXML);
                StringWriter sw1 = new StringWriter();
                xXslt.Transform(xml, null, sw1);
                FinalXML.Add(sw1);
                sw.Close();
                k++;
            }

            using (SpreadsheetDocument doc = SpreadsheetDocument.Create(@"c:\\temp\\output.xlsx", DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
            {
                WorkbookPart workbook1 = doc.AddWorkbookPart();
                string XML;
                string WorbookXML;
                WorbookXML = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes""?><workbook xmlns=""http://schemas.openxmlformats.org/spreadsheetml/2006/main"" xmlns:r=""http://schemas.openxmlformats.org/officeDocument/2006/relationships""><sheets>";
                for (int j = 0; j < DN.Count; j++)
                {
                    WorksheetPart[] sheet = new WorksheetPart[DN.Count];
                    sheet[j] = workbook1.AddNewPart<WorksheetPart>();
                    string sheetId = workbook1.GetIdOfPart(sheet[j]);
                    XML = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes""?><worksheet xmlns=""http://schemas.openxmlformats.org/spreadsheetml/2006/main"" >";
                    XML += FinalXML[j].ToString() + "</worksheet>";
                    string SheetXML = XML.ToString();
                    XmlDocument SXML = new XmlDocument();
                    SXML.LoadXml(SheetXML);
                    byte[] byteArray = Encoding.ASCII.GetBytes(SXML.OuterXml);
                    MemoryStream stream = new MemoryStream(byteArray);
                    StreamReader reader = new StreamReader(stream);
                    string text = reader.ReadToEnd();
                    **WorbookXML += "<sheet name=" + "\"sheet" + (j + 1).ToString() + "\" " + " sheetId=\"" + (j + 1).ToString() + "\"  r:id=\"" + sheetId.ToString() + "\" />";
                    AddPartXml(sheet[j], text);**
                }
                WorbookXML += "</sheets></workbook>";
                AddPartXml(workbook1, WorbookXML);
                doc.Close();
            }

        }

        public void AddPartXml(OpenXmlPart part, string xml)
        {
            **using (Stream stream = part.GetStream())
            {
                byte[] buffer = (new UTF8Encoding()).GetBytes(xml);
                stream.Write(buffer, 0, buffer.Length);
            }**
        }