Use. NET read XML file

Xml

introduce In this article I'll explain how to read XML files in a asp.net application, which is a very useful technique. With this technique, we can customize the configuration file for our application, or we can read the data stored in the XML file. Introduction The following code uses the XmlTextReader object to read data from the disk file into the XmlDocument object. XmlTextReader objects are functionally similar to StreamReader and BinaryReader objects, except that they are specifically designed to read XML files. In addition, there are some other XML-related features of the XmlTextReader object. For example, the WhitespaceHandling property used in the code tells the application not to establish nodes for extra spaces in the XML file. The following code uses the DocumentElement property of the XmlTextReader object to find the root node of the tree representation of an XML document. The Addwithchildren method is then recursively called to add the node and its child nodes to the listbox. The following code also contains the processing of the property. The attribute node is not included in the collection of child nodes of a XmlDocument object's nodes. Therefore, you can only use the XmlNode object's Attributes property to get the attribute node collection. After the collection of property nodes is obtained, the code uses the XmlNamedNodeMap object to save the collection. This object can hold any collection of XmlNode objects of any type. code List Program code: private void Btnload_click (object sender, System.EventArgs e) { XmlTextReader reader = new XmlTextReader ( Server.MapPath ("Mycompany.xml")); 　　　 Reader. WhitespaceHandling = WhitespaceHandling.None; XmlDocument xmldoc = new XmlDocument (); To load a file into a XmlDocument object Xmldoc.load (reader); Close connection Reader. Close (); Add an element representing a document to the ListBox LBNODES.ITEMS.ADD ("XML Document"); Finds the root node and adds it and its child nodes to the listbox XmlNode Xnod = xmldoc.documentelement; Addwithchildren (xnod,1); } 　　 private void Addwithchildren (XmlNode xnod, Int32 intlevel) { Add a node and its child nodes to the listbox Intlevel to control indentation depth XmlNode xnodworking; String strindent = new String (', 2 * intlevel); If the node has a value, read its value String strvalue = (string) Xnod. Value; if (strvalue!= null) { strvalue = ":" + strvalue; } Add the details of a node to the listbox LBNODES.ITEMS.ADD (Strindent + xnod). Name + strvalue); If it's an element node, get its properties if (Xnod. NodeType = = XmlNodeType.Element) { XmlNamedNodeMap mapattributes = Xnod. Attributes; To add a node property to the ListBox foreach (XmlNode xnodattribute in mapattributes) { LBNODES.ITEMS.ADD (strindent + "" + Xnodattribute.name + ":" + xnodattribute.value); } If there are child nodes, call this program recursively if (Xnod. HasChildNodes) { xnodworking = Xnod. FirstChild; while (xnodworking!= null) { Addwithchildren (xnodworking, Intlevel + 1); xnodworking = xnodworking.nextsibling; } } } } }