Question

The following code snippet returns xml document

public XmlDocument GetXMLFile(int ID)
        {

            List<UserInfoBE> data = GetById(ID);
            DataSet ds = ConvertGenericsListToDataSet(data);
            XmlDocument XmlDoc = new XmlDocument();
            XmlDocument doc = GenerateXMLDeclaration(XmlDoc);//Create xml Declaration
            doc = AddTableTag(doc);//Create parent node USERDATA

            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                doc = AddUserinfoTag(doc, dr[8].ToString(), Convert.ToInt32(dr[31].ToString()), Convert.ToString(dr[32].ToString()), dr[3].ToString());
            }

            doc = SetHeirarchyLevel(doc);
            string _errorFile = AppDomain.CurrentDomain.BaseDirectory + "XML\\";
            System.IO.Directory.CreateDirectory(_errorFile);
            _errorFile += "FIle" + DateTime.Now.ToString("dd-MM-yyyy") + ".xml"; 
            XmlNodeList nodes = doc.SelectNodes("USERDATA/Userinfo");
            XmlDocument newXMLDoc = new XmlDocument();
            XmlDocument newDoc = GenerateXMLDeclaration(newXMLDoc);
            newDoc.AppendChild(nodes);            
            doc.Save(_errorFile);
            return doc;
        }

XML file format:

<?xml version="1.0"?>
<USERDATA>
  <Userinfo>
    <Userinfo>
      <Userinfo>
        <Userinfo>
          <Userinfo>
            <Userinfo/>
            <Userinfo>
              <Userinfo/>
            </Userinfo>
          </Userinfo>
          <Userinfo>
            <Userinfo/>
            <Userinfo/>
          </Userinfo>
        </Userinfo>
      </Userinfo>
    </Userinfo>
  </Userinfo>
</EDVDATA>

Question how do get file in following format

<Userinfo>
        <Userinfo>
          <Userinfo>
            <Userinfo>
              <Userinfo>
                <Userinfo/>
                <Userinfo>
                  <Userinfo/>
                </Userinfo>
              </Userinfo>
              <Userinfo>
                <Userinfo/>
                <Userinfo/>
              </Userinfo>
            </Userinfo>
          </Userinfo>
        </Userinfo>
      </Userinfo>

What i have tried is saving the return doc object (Xml file) in a folder.
then created a new xmldocument object and trying to append Xmlnodelist which userinfo structure(just above) in new xmlobject

newDoc.AppendChild(nodes); line throws an error

cannot convert from ‘System.Xml.XmlNodeList’ to ‘System.Xml.XmlNode’

any help is very much appreciated.

Answer 1

You are trying to append multiple nodes but the function takes single node to append at a time. Try this:

foreach(XmlNode node in nodes)
{
    newDoc.AppendChild(node);
}