Datasheet

Chapter 1: AJAX Technologies

Listing 1-3 (continued)

{

// Same as Listing 2

}

function serialize(credentials)

{

// Same as Listing 2

}

function submitCallback()

{

// Same as Listing 2

}

</script>

</head>

<body>

<!- Same as Listing 2 ->

</form>

</body>

</html>

Now let’s walk through the implementations of the Page_Load server-side method and the

deserialize JavaScript function in this listing, starting with the Page_Load method.

The

Page_Load method begins by instantiating a StringWriter into which the XML data will be

written:

string xml = ””;

using (StringWriter sw = new StringWriter())

Then it instantiates an XmlWriterSettings object that specifies the settings for the XML document. In

this case, the XML document will be indented and it will not contain the XML declaration:

XmlWriterSettings settings = new XmlWriterSettings();

settings.Indent = true;

settings.OmitXmlDeclaration = true;

Next, it instantiates an XmlWriter object with the specified settings and wraps the StringWriter . In

other words, this

XmlWriter will write the XML into the StringWriter :

using (XmlWriter xw = XmlWriter.Create(sw, settings))

Then, it invokes the WriteStartDocument method on the XmlWriter to mark the beginning of the

XML document:

xw.WriteStartDocument();

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