如何获取所有xml节点和值

Question

I have an xml and want to get all the nodes and values from it. Below an example of the source xml and the output I want to create:

<bookstore>
  <book category="COOKING">
    <title lang="en">Everyday Italian</title>
    <author>Giada De Laurentiis</author>
    <year>2005</year>
    <price curr="$">30.00</price>
  </book>
</bookstore>

Nodes   Values
bookstore.book.category COOKING
bookstore.book.title.lang   en
bookstore.book.title    Everyday Italian
bookstore.book.author   Giada De Laurentiis
bookstore.book.year 2005
bookstore.book.price.curr   $
bookstore.book.price    30

The output I want to create consists of 2 columns, nodes and it's value. How can I achieve this? Should I use XmlDocument class?

Answer 1

I would suggest a recursive method that accepts a string containing the current path and the XmlNode to go into. In each recursion it looks like you want to loop through all the node attributes and then each child node. Check your NodeType to determine when you have reach the end of the recursion.

Load the original XML into an XmlDocument, then call your recursive method starting with the DocumentElement node.

EDIT:

Not the prettiest code I've ever done but it takes the given input and produces the requested output:

static void Main(string[] args)
{
    string xmlSrc = @"<bookstore><book category=""COOKING""><title lang=""en"">Everyday Italian</title><author>Giada De Laurentiis</author><year>2005</year><price curr=""$"">30.00</price></book></bookstore>";

    XmlDocument xDoc = new XmlDocument();
    xDoc.LoadXml(xmlSrc);

    StringBuilder sbOut = new StringBuilder();
    sbOut.AppendLine("Nodes\tValues");
    sbOut.Append(XmlToText(xDoc.DocumentElement));

    Console.WriteLine(sbOut.ToString());
    Console.WriteLine("Press any key to exit...");
    Console.ReadLine();
}


static StringBuilder XmlToText(XmlElement node, string generationPath = "")
{
    StringBuilder sbRet = new StringBuilder();

    generationPath += (String.IsNullOrEmpty(generationPath) ? "" : ".") + node.Name;

    foreach( XmlAttribute attr in node.Attributes)
    {
        sbRet.AppendLine(String.Format("{0}.{1}\t{2}", generationPath, attr.Name, attr.Value));
    }

    foreach( XmlNode child in node.ChildNodes)
    {
        if( child.NodeType == XmlNodeType.Element)
        {
            sbRet.Append(XmlToText(child as XmlElement, generationPath));
        }
        else if ( child.NodeType == XmlNodeType.Text)
        {
            sbRet.AppendLine(String.Format("{0}\t{1}", generationPath, child.InnerText));
        }
    }

    return sbRet;
}

Answer 2

Here is the code you are looking for

private static void PrintOutNodesRecursive(XmlElement xmlElement, string currentStack)
{
    foreach (XmlAttribute xmlAttribute in xmlElement.Attributes)
    {
        Console.WriteLine("{0}.{1} = {2}", currentStack, xmlAttribute.Name, xmlAttribute.Value);
    }
    foreach (XmlNode xmlNode in xmlElement.ChildNodes)
    {
        XmlElement xmlChildElement = xmlNode as XmlElement;
        XmlText xmlText = xmlNode as XmlText;

        if (xmlText != null)
        {
            Console.WriteLine("{0} = {1}", currentStack, xmlText.Value);
        }

        if (xmlChildElement != null)
        {
            PrintOutNodesRecursive(xmlChildElement, currentStack + "." + xmlChildElement.Name);
        }
    }
}


static void Main(string[] args)
{
    string xmlContent = @"<bookstore>
      <book category=""COOKING"">
        <title lang=""en"">Everyday Italian</title>
        <author>Giada De Laurentiis</author>
        <year>2005</year>
        <price curr=""$"">30.00</price>
      </book>
    </bookstore>";

    XmlDocument xmlDocument = new XmlDocument();
    xmlDocument.LoadXml(xmlContent);

    PrintOutNodesRecursive(xmlDocument.DocumentElement, xmlDocument.DocumentElement.Name);

}