Adding attributes to an XML node

Question

How can I create an xml file dynamically  with the following structure    lt Login gt     lt id userName  Tushar  passWord  Tushar  gt         lt Name gt Tushar lt  Name gt         lt Age gt 24 lt  Age gt     lt  id gt   lt  Login gt    I am not able to create the attributes inside the id tag  i e  userName    and  passWord       I am using C  in a windows application   Some Important namespace that you might require is   using System Xml  using System IO

User · Answer

There is also a way to add an attribute to an XmlNode object, that can be useful in some cases.

I found this other method on msdn.microsoft.com.

using System.Xml;

[...]

//Assuming you have an XmlNode called node
XmlNode node;

[...]

//Get the document object
XmlDocument doc = node.OwnerDocument;

//Create a new attribute
XmlAttribute attr = doc.CreateAttribute("attributeName");
attr.Value = "valueOfTheAttribute";

//Add the attribute to the node     
node.Attributes.SetNamedItem(attr);

[...]

User · Answer

The latest and supposedly greatest way to construct the XML is by using LINQ to XML   using System Xml Linq         var xmlNode               new XElement  Login                            new XElement  id                                new XAttribute  userName    Tushar                                 new XAttribute  password    Tushar                                 new XElement  Name    Tushar                                 new XElement  Age    24                                                    xmlNode Save  Tushar xml      Supposedly this way of coding should be easier  as the code closely resembles the output  which Jon s example above does not   However  I found that while coding this relatively easy example I was prone to lose my way between the cartload of comma s that you have to navigate among  Visual studio s auto spacing of code does not help either

User · Answer

You can use the Class XmlAttribute    Eg   XmlAttribute attr   xmlDoc CreateAttribute  userName    attr Value    Tushar    node Attributes Append attr

User · Answer

Well id isn t really the root node  Login is   It should just be a case of specifying the attributes  not tags  btw  using XmlElement SetAttribute  You haven t specified how you re creating the file though - whether you re using XmlWriter  the DOM  or any other XML API   If you could give an example of the code you ve got which isn t working  that would help a lot  In the meantime  here s some code which creates the file you described   using System  using System Xml   class Test       static void Main                 XmlDocument doc   new XmlDocument            XmlElement root   doc CreateElement  Login            XmlElement id   doc CreateElement  id            id SetAttribute  userName    Tushar            id SetAttribute  passWord    Tushar            XmlElement name   doc CreateElement  Name            name InnerText    Tushar           XmlElement age   doc CreateElement  Age            age InnerText    24            id AppendChild name           id AppendChild age           root AppendChild id           doc AppendChild root            doc Save  test xml

User · Answer

If you serialize the object that you have  you can do something like this by using  System Xml Serialization XmlAttributeAttribute  on every property that you want to be specified as an attribute in your model  which in my opinion is a lot easier    System Xml Serialization XmlTypeAttribute AnonymousType   true   public class UserNode        System Xml Serialization XmlAttributeAttribute        public string userName   get  set          System Xml Serialization XmlAttributeAttribute        public string passWord   get  set         public int Age   get  set        public string Name   get  set                  public class LoginNode         public UserNode id   get  set         Then you just serialize to XML an instance of LoginNode called  Login   and that s it   Here you have a few examples to serialize and object to XML  but I would suggest to create an extension method in order to be reusable for other objects

[c#] Adding attributes to an XML node

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