| Reference content is as follows: Code:
1) counter. aspx:-The Counter Page <% @ Import Namespace = "System. IO" %>
<% @ Assembly Name = "System. xml (standardization is getting closer and closer)" %>
<% @ Import Namespace = "System. xml (standardization is getting closer and closer)" %>
<% @ Page language = "c #" EnableSessionState = "True" %>
<% -- These are the imported assembiles and namespaces need to run the counter -- %>
<Html>
<Head>
<Title> Saurabh's xml (standardization is getting closer and closer) Counter Script </title>
<Script language = "C #" runat = "server">
// Script is called when the page is loaded
Public void Page_Load (Object src, EventArgs e)
{
// The path to the xml (standardization is getting closer and closer) file which will contain all the data
// Modify this if you have any other file or directory mappings.
// Modify this if you have been directed here from Step 2 of the ReadMe file.
String datafile = "db/xml (standardization is getting closer and closer) counter. xml (standardization is getting closer and closer )"; If (! Page. IsPostBack ){
// Try-catch block containing the counter code
Try {
// Create an instance of the class xml (standardization is getting closer and closer) Document
Xml (standardization is getting closer and closer) Document xml (standardization is getting closer and closer) document = new xml (standardization is getting closer and closer) Document (); // Open a FileStream to the specified file
FileStream fin;
// It is very Important to specify the "FileShare. ReadWrite" option.
// This allows other viewers to also read and write to the Database
// This was missing in my last release hence there was a BUG !!!
Fin = new FileStream (Server. MapPath (datafile), FileMode. Open, FileAccess. Read,
FileShare. ReadWrite );
// Load the Document
Xml (standardization is getting closer and closer) document. Load (new StreamReader (fin ));
Fin. Close ();
// Create an instance of the DocumentNavigator class used
// Navigate through and xml (standardization is getting closer and closer) file
DocumentNavigator navigator = new DocumentNavigator (xml (standardization is getting closer and closer) document ); // Move to the first element (in my file 'visitors ')
Navigator. MoveToDocumentElement ();
// Move to it child at position '0' (ie. in my file 'Total' node)
Navigator. MoveToChild (0 ); // Check if we are on the right element which has an attribute
If (navigator. HasAttributes ){
// Get the attribute of the node 'Total' called' tot' (see the xml (standardization is getting closer and closer) counter. xml (standardization is getting closer and closer) file)
// Since the value stored is in a string format we 'cast' it into a Int type
Int total = int. Parse (navigator. GetAttribute ("tot "));
// Increase the counter
Total ++;
// Show the counter on the page
Countmess. Text = "You are visitor N" + total. ToString ();
// Save the incremented counter back in the xml (standardization is getting closer and closer) file
Navigator. SetAttribute (0, total. ToString ());
} // Update the Database only if a new session is there
If (Session ["counter"] = null)
{
// Move back to the Document element
Navigator. MoveToDocumentElement ();
Navigator. MoveToChild (0 );
// Then insert the element after the 'total' element which will contain all
// The information of a single visitor
Navigator. Insert (TreePosition. After, xml (standardization is getting closer and closer) NodeType. Element, "Viewer ","","");
// Make an instance to the HttpUrl class to get information of the referrer
// The page if any. if there are no referrers then by Default this object is 'null'
// So we have to make a check if it is null and do the needful
HttpUrl objUrl = Request. UrlReferrer;
If (objUrl! = Null)
{
Navigator. Insert (TreePosition. FirstChild, xml (standardization is getting closer and closer) NodeType. Element, "Referrer ","","");
Navigator. Insert (TreePosition. FirstChild, xml (standardization is getting closer and closer) NodeType. Text, "Referrer ","",""); |
