Xml File should create new line and leave the previous data

Question

How can I write an XML file so that it starts a new line and does not overwrite the previous data?

string pfad = "C:\\temp\\Accounts.xml";

XmlDocument doc = new XmlDocument();
XmlElement root = doc.CreateElement("Login");
XmlElement id = doc.CreateElement("user");
XmlElement username = doc.CreateElement("username");
username.InnerText = txtBenutzerName.Text;

id.AppendChild(username);

root.AppendChild(id);
doc.AppendChild(root);
doc.Save(pfad);
MessageBox.Show("Created SuccesFully!");

You're creating a completely new document - it sounds like you should load the existing XML file, append the new element, then save it again. — Jon Skeet, Apr 18 '18 at 13:03
Welcome on Stacloverflow as 'original poster'. You probably do not want to create a new document. Open the existing one and add the node. Of course this has been asked before. See https://stackoverflow.com/questions/5975114/adding-new-node-to-existing-xmldocument-object . Your question will be marked as duplicate (by someone with enough reputation). — RWC, Apr 18 '18 at 13:13

score 4 · Answer 1 · answered Apr 18 '18 at 13:10

4

Instead of creating a new document by this line

XmlDocument doc = new XmlDocument();

you should load existing file like this:

XmlDocument doc = new XmlDocument();
doc.Load(pfad);

...below code is the same...

answered Apr 18 '18 at 13:10

v.karbovnichy

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score 0 · Answer 2 · edited Apr 18 '18 at 14:59

0

  XmlDocument doc = new XmlDocument();
  doc.Load("C:\\Accounts.xml");
  doc.GetElementsByTagName("username")[0].InnerText="sdkjfsdknfkds";
  doc.Save("C:\\Accounts.xml");

edited Apr 18 '18 at 14:59

Paul Floyd

5,530
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answered Apr 18 '18 at 13:47

Bikash

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Xml File should create new line and leave the previous data

2 Answers2