Summary How to Get the Attribute Value with XmlNodeReader and GetAttribute?

Sometimes it is necessary to get the attribute value of a specific node. This can be achieved with the GetAttribute function. You can simply pass the name of the ID and it will return the value. However if the attribute is not found, then it will return a null reference. In the example I am using the following XML file:  

Additional information

<%@ import namespace="System.Xml" %> <%@ page language="C#" debug="true"%> <script runat="server"> void page_load(object sender, System.EventArgs e){ // Load the XmlDocument with the file XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(Server.MapPath("XmlNodeReaderWithGetAttribute.xml")); // Create a new XmlNodeReader object and load the // category node XmlNodeReader nodeReader; nodeReader = new XmlNodeReader(xmlDoc.SelectSingleNode("CategoryList/Category/MainCategory")); // Read the node nodeReader.Read(); // printout the result Response.Write("ID Value: "+nodeReader.GetAttribute("ID")); } </script>

Further additional information

<?xml version="1.0" encoding="utf-8"?> <CategoryList> <Category> <MainCategory ID="0">VC++</MainCategory> <Description>VC++ Articles</Description> <Active>Yes</Active> </Category> <Category> <MainCategory ID="1">XML</MainCategory> <Description>XML Articles</Description> <Active>Yes</Active> </Category> <Category> <MainCategory ID="2">XSL</MainCategory> <Description>XSL Articles</Description> <Active>Yes</Active> </Category> <Category> <MainCategory ID="3">XPath</MainCategory> <Description>XPath Articles</Description> <Active>Yes</Active> </Category> <Category> <MainCategory ID="4">XQuery</MainCategory> <Description>XQuery Articles</Description> <Active>Yes</Active> </Category> </CategoryList>

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