XmlTextReader and Writer

hi,

i have the code

Code:

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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

Code:

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  <?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: )

Code:

---

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

---

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

Have you tried

Code:

---

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.

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

Code:

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

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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.

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

Quote:

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

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