Simplifies state management by a natural, top-down procedural refinement. XmlReader uses a pull model to retrieve data. XmlReader also provides data conformance checks and validation against a DTD or schema. For example, the property is set to ReadState.Initial by the XmlReader.Read method and ReadState.Closed by the XmlReader.Close method. The ReadState property value indicates the current state of the XML reader. The properties of the class reflect the value of the current node, which is where the reader is positioned. XmlReader methods let you move through XML data and read the contents of a node. This class conforms to the W3C Extensible Markup Language (XML) 1.0 (fourth edition) and the Namespaces in XML 1.0 (third edition) recommendations. XmlReader provides forward-only, read-only access to XML data in a document or stream. Using (XmlReader reader = XmlReader.Create(stream, settings))Ĭonsole.WriteLine("Start Element ", XmlReaderSettings settings = new XmlReaderSettings() async Task TestReader(System.IO.Stream stream) We also need an EventArgs for the completed event that carries the completed List and also an Error property that will return any exception that may have occured.The following example code shows how to use the asynchronous API to parse XML. You have a TaxiCompany class, I'll invent my own here so that the example is as complete as possible:- public class TaxiCompany We're going to create a class ( TaxiCompanyFinder) that has a single method which fires off the asynchronous job to get the results you are after and then has an event that is raised when the job is done. You could put that anywhere but I recommend you create a static public class called "WebClientUtils" and put it in there. ![]() Second you'll need the "DownloadString" function from Part 2. What you actually need is a couple of code blocks from them to put in your application.įirst from Part 1 copy the code from the "AsyncOperationService" box, place it in new class file in your project called "AsyncOperationService.cs". I'm not suggesting you actually read them (although you're welcome too but I've been told they're not easy reading). Is there any way to either:ġ.) Pass the name and phone variables into the 2nd method to create the taxi object thereĢ.) Pass back the gResults variable and only then create the corresponding taxicompany object?įirst off I want to point you to a couple of blog posts called Simple Asynchronous Operation Runner Part 1 and Part 2. The above snipped finds the number of search results on bing, but the problem is since it launches async there is no way to correlate the gResults obtained in the 2nd method with the right company in method 1. Void findTotalResults(object sender, DownloadStringCompletedEventArgs e) Parses search XML result to find number of results ![]() So that bit of code finds the taxi company and launches an asynchronous task to find the number of search results ( gResults ) to create each teaxicompany object. TaxiCompanyDisplayList.ItemsSource = taxiCoList TaxiCoList.Add (new TaxiCompany(rName, phone, gResults)) String baseURL = "" + name + "%22&sources=web" Ĭ.DownloadStringCompleted += new DownloadStringCompletedEventHandler(findTotalResults) If (reader.NodeType = XmlNodeType.Element) ![]() XmlReader reader = XmlReader.Create(new MemoryStream(8.GetBytes(s))) Now what I want to do is, to search for each of these terms on Bing, find the number of hits each search term returns and rank them accordingly (a loose sort of popularity ranking) void findBestResult(object sender, DownloadStringCompletedEventArgs e) ![]() So I have a Win Phone app that is finding a list of taxi companies and pulling their name and address from Bing successfully and populating a listbox that is being displayed to users.
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