使用多个名称空间.net C＃从XML解析值

Question

Here is my code

 String MyXml = "<av:Button Name="btn_1" Width="80" Height="25" x:Uid="btn_1" av:Canvas.Left="168.1" av:Canvas.Top="95.1" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">My Button Content</av:Button>";

    XmlNamespaceManager mngr = new XmlNamespaceManager(new NameTable());
    mngr.AddNamespace("av", "http://www.w3.org/2001/XMLSchema-instance");

    XmlParserContext parserContext = new XmlParserContext(null, mngr, null, XmlSpace.None);

    XmlTextReader txtReader = new XmlTextReader(MyXml, XmlNodeType.Element, parserContext);

    var doc = XElement.Load(txtReader);

    var name = doc.Attribute("Name").Value;
    var width = doc.Attribute("Width").Value; 
    var Uid   = doc.Attribute("Uid").Value; // Not Working

I am unable to get the Uid because of different namespace probably, same goes for av:Canvas.Top .

How to get these attributes?

-TIA

Answer 1

First, add all the namespaces

    XmlNamespaceManager manager= new XmlNamespaceManager(new NameTable());
    mngr.AddNamespace("av", "http://www.w3.org/2001/XMLSchema-instance");
    mngr.AddNamespace("x", "url_for_x");

Now, if you want to check for attributes and nodes regardless of the namespace you could simply visit each node and then loop through its attributes to find out the value.

    XmlNode uuidNode = xmldoc.SelectSingleNode("/namespace:node", manager);
    if (uuidNode.Attributes != nul)
      foreach(XmlAttribute oAttribute in uuidNode.Attributes)
        if (oAttribute == "UUID")
          name = oAttribute.Value;

As long as you add the path you want to visit in SelectSingleNode and your namespaces are declared you should be able to run through any node and get any value you want.

Answer 2

Try this

        XNamespace xlink = "http://schemas.microsoft.com/winfx/2006/xaml";
        var name = doc.Attribute("Name").Value;
        var width = doc.Attribute("Width").Value;
        var Uid = doc.Attribute(xlink + "Uid").Value;

Answer 3

Concatenate MyXml with xmlns:av="anyNameSpaceName" and then you can access it with,

  String MyXml = "<av:Button Name=\"btn_1\" Width=\"80\" Height=\"25\" x:Uid=\"btn_1\" av:Canvas.Left=\"168.1\" av:Canvas.Top=\"95.1\" xmlns:av=\"anyNameSpaceName\" xmlns:x=\"http://schemas.microsoft.com/winfx/2006/xaml\">My Button Content</av:Button>";
  XNamespace ns = "anyNameSpaceName";
  var Canvat_Top= doc.Attribute(ns + "Canvas.Top").Value;