XmlTextReader and Writer

[hkullana]

hi,

i have the code

XmlTextWriter tr = new XmlTextWriter("Items.xml",null);
            tr.Formatting = Formatting.Indented;
            tr.WriteStartDocument();

            tr.WriteStartElement("Items");

            tr.WriteStartElement("books");
            tr.WriteElementString("book1","harry");
            tr.WriteElementString("book2","lotr");
            tr.WriteEndElement();
            tr.Flush();
tr.Close();

so it generates the xml code below

  <?xml version="1.0" ?> 
- <Items>
    - <books>
       <book1>harry</book1> 
       <book2>lotr</book2> 
     </books>
  </Items>

Now i want to delete the tag <book1> and its text harry from the file. How can i do it? (after the deletion the xml file will look like this: )

  <?xml version="1.0" ?> 
- <Items>
    - <books>
       <book2>lotr</book2> 
     </books>
  </Items>

[creatorul]

You can not do that (the deletion) with XmlTextWriter. Use the DOM approach for that:
http://www.devsource.com/article2/0,1895,1934067,00.asp

[JonnyPoet]

Have you tried

XmlTextWriter tr = new XmlTextWriter("Items.xml",null);
tr.Formatting = Formatting.Indented;
tr.WriteStartDocument();
 
tr.WriteStartElement("Items");
 
tr.WriteStartElement("books");
tr.WriteElementString("book2","lotr");
tr.WriteEndElement();
tr.Flush();
tr.Close();

This should create exactly the code you wanted.

[hkullana]

thanks for the website that is exactly what i want. I have one more question

XmlNodeList nodeList = doc.SelectNodes("//Authors");

in the above code what is the meaning of the slashes?

it is written that "Each slash represents a level in the element hierarchy." But i cannot understand what it means.

[creatorul]

That is an XPath expression that selects all the Authors nodes in the document.
http://www.w3schools.com/xpath/xpath_syntax.asp

// Selects nodes in the document from the current node that match the selection no matter where they are