how to add items t xml file in c#

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Hi i using this code to write into xml files

C#

XmlTextWriter writer = new XmlTextWriter("test.xml", Encoding.UTF8);

writer.WriteStartDocument();

writer.WriteStartElement("C");

writer.WriteStartElement("Subject");
writer.WriteString(txtSubject.Text);
writer.WriteEndElement();//Subject

foreach (string item in listBox1.Items)
{
    writer.WriteStartElement("Items");
    writer.WriteString(item);
    writer.WriteEndElement();//Items
}
writer.WriteEndElement();//C

writer.WriteEndDocument();

writer.Close();

now i want to add some items to this but its not adding into xml file, its write again of zero
how can i add some more items to my xml file?
With Respect

Posted 4-Feb-15 6:01am

Avenger1

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Thomas Daniels 4-Feb-15 12:13pm

Can you please show the code where you try to add some more items?

Avenger1 4-Feb-15 14:30pm

i don't know how to add and i have just this code

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Gideon van Dyk · Accepted Answer · 2015-02-04T11:01:00

Based on your supplied code:

C#

private void AppendItems()
{
    string subject = "TestSubject";
    List<string> listItems = new List<string>();
    listItems.Add("Items5");
    listItems.Add("Items6");

    XmlDocument xDoc = new XmlDocument();
    xDoc.Load("test.xml");

    XmlNode subjectNode = xDoc.DocumentElement.SelectSingleNode("Subject['" + subject + "']");
    foreach (string item in listItems)
    {
        XmlNode newItem = xDoc.CreateNode(XmlNodeType.Element, "Items", xDoc.NamespaceURI);
        newItem.InnerText = item;
        subjectNode.ParentNode.AppendChild(newItem);
    }

    xDoc.Save("test.xml");
}