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AHAH: Asychronous HTML and HTTP

AHAH is a very simple technique for dynamically updating web pages using JavaScript. It involves using XMLHTTPRequest to retrieve (X)HTML (http://en.wikipedia.org/wiki/HTML) fragments which are then inserted directly into the web page, whence they can be styled using CSS. AHAH is intended to be a much simpler way to do web development than AJAX: "Asynchronous JavaScript and XML." Strictly speaking, AHAH can be considered a subset of AJAX, since (X)HTML is just a special kind of XML. However, it is a subset with some very specific and useful properties: 1. The lack of custom XML schemas dramatically reduces design time 2. AHAH can trivially reuse existing HTML pages, avoiding the need for a custom web service 3. All data transport is done via browser-friend HTML, easing debugging and testing 4. The HTML is designed to be directly embedded in the page's DOM, eliminating the need for parsing 5. As HTML, designers can format it using CSS, rather than programmer...
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Cloud Computing

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Process XML in Dot Net -> Parse to Object

Here we consider a small aspect found while parsing XML string. We are using Dot Net (1.1) but we process xml in general (non-dotnet specific version) using the XPath expressions. Situation is we have XML string format as: task TASK_COMPLETE 02000016000004630144000100000070 02000016000004630154000200000070 2007-09-06T15:26:25+04:00 = strXMLMsg Scene 1: Dim xmlDoc As New Xml.XmlDocument xmlDoc.LoadXml(strXMLMsg) strXPath = "/XMLMessage /EventName" xmlNode = xmlDoc.SelectSingleNode(strXPath) strData = xmlNode.InnerText In this seen we will not be able to get our parsed data. And the issue is the inclusion of the namespace and its prefix. So to get the parsed data correctly we have to use the way shown in scene 2. Scene 2: Dim xmlDoc As New Xml.XmlDocument xmlDoc.LoadXml(strXMLMsg) xsn = New Xml.XmlNamespaceManager(xmlDoc.NameTable) XMLNamespace = "http://domain.com/codename/MessagesXMLSchema.xsd" XMLNamespacePrefix = "ns" xsn.AddNamespac...
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