C # Create, read, write XML file 1

The XML format is as follows

<?xml version="1.0"encoding="Utf-8"?><advertisements> <Ad> <ImageUrl>001.jpg</imageurl> <NavigateUrl>001.aspx</navigateurl> <Impressions>Ten</Impressions> <Keyword>gucas01</Keyword> </Ad> <Ad> <ImageUrl>002.jpg</imageurl> <NavigateUrl>002.aspx</navigateurl> <Impressions> -</Impressions> <Keyword>gucas02</Keyword> </Ad> <Ad> <ImageUrl>003.jpg</imageurl> <NavigateUrl>003.aspx</navigateurl> <Impressions> -</Impressions> <Keyword>gucas03</Keyword> </Ad> <Ad> <ImageUrl>004.jpg</imageurl> <NavigateUrl>004.aspx</navigateurl> <Impressions> +</Impressions> <Keyword>gucas04</Keyword> </Ad> <Ad> <ImageUrl>005.jpg</imageurl> <NavigateUrl>005.aspx</navigateurl> <Impressions> -</Impressions> <Keyword>gucas05</Keyword> </Ad> <Ad> <imageurl>google.gif</ Imageurl> <navigateurl>http://www.google.com</navigateurl><Impressions> -</Impressions> <Keyword>google</Keyword> </Ad></Advertisements>

Operations on XML files

/// <summary>    ///Creating an XML file/// </summary>    /// <param name= "filename" ></param>     Public voidCreatexmlfile (stringfilename) {XmlDocument xmldoc=NewXmlDocument ();        XmlNode node; Node= xmldoc. Createxmldeclaration ("1.0","Utf-8",NULL); XmlDoc.        AppendChild (node); XmlNode Root= xmldoc. CreateElement ("Users"); XmlDoc.        AppendChild (root); CreateNode (xmldoc, Root,"UserName","zhengyd"); CreateNode (xmldoc, Root,"Email","[Email PROTECTED],CN"); CreateNode (xmldoc, Root,"URL","WWW.GUCAS.AN,CN"); CreateNode (xmldoc, Root," Age"," -"); Try{xmldoc.            Save (Server.MapPath (filename)); Response.Write ("Create XML file Myxml.xml success!"); }        Catch(Exception ex) {Response.Write (ex).        Message); }    }    /// <summary>    ///Write XML file/// </summary>    /// <param name= "file" ></param>     Public voidWritexmlfile (stringfile) {XmlDocument Xmdoc=NewXmlDocument (); Try{Xmdoc.            Load (Server.MapPath (file)); XmlNode Root= Xmdoc. selectSingleNode ("Advertisements"); if(Root! =NULL) {XmlNode node= Xmdoc. CreateNode (XmlNodeType.Element,"Ad",NULL); CreateNode (Xmdoc, node,"IMAGEURL","Google.gif"); CreateNode (Xmdoc, node,"NAVIGATEURL","http://www.google.com"); CreateNode (Xmdoc, node,"Impressions"," -"); CreateNode (Xmdoc, node,"Keyword","Google"); Root.            AppendChild (node); } xmdoc.            Save (Server.MapPath (file)); Response.Write ("writing XML file XMLFile.xml succeeded. <br>"); }        Catch(Exception ex) {Response.Write (ex).        Message); }    }    /// <summary>    ///Create a node/// </summary>    /// <param name= "xmldoc" ></param>    /// <param name= "parentnode" ></param>    /// <param name= "name" ></param>    /// <param name= "value" ></param>     Public voidCreateNode (XmlDocument xmldoc, XmlNode parentnode,stringNamestringvalue) {XmlNode node= xmldoc. CreateNode (XmlNodeType.Element, name,NULL); Node. InnerText=value; ParentNode.    AppendChild (node); }    /// <summary>    ///reading an XML file/// </summary>    /// <param name= "file" ></param>    Private voidReadFile (stringfile) {XmlDocument xmldoc=NewXmlDocument (); Try{xmldoc.            Load (Server.MapPath (file)); XmlNode node= xmldoc. selectSingleNode ("Advertisements"); if(Node! =NULL) {TreeNode root=NewTreeNode (); Root. Text=node.                Name;                TVXML.NODES.ADD (root); foreach(XmlNode XNodeinchXmlDoc. SelectNodes ("advertisements/ad") {TreeNode tnode=NewTreeNode (); Tnode. Text= Server.HTMLEncode ("<"+ XNode. Name +">"); Root.                        Childnodes.add (tnode); foreach(XmlNode XcnodeinchXNode. ChildNodes) {TreeNode Tcnode=NewTreeNode (); Tcnode. Text= Server.HTMLEncode ("<"+ Xcnode. Name +">"+ Xcnode. InnerText +"</"+ Xcnode. Name +">"); Tnode.                        Childnodes.add (Tcnode); } TreeNode Ttnode=NewTreeNode (); Ttnode. Text= Server.HTMLEncode ("</"+ XNode. Name +""); Root.                Childnodes.add (Ttnode); } TreeNode Tpnode=NewTreeNode (); Tpnode. Text= Server.HTMLEncode ("</"+ node. Name +">");            TVXML.NODES.ADD (Tpnode); }        }        Catch(Exception ex) {Response.Write (ex).        Message); }    }

C # Create, read, write XML file 1