BUILDING MORE RESPONSIVE WEB PAGES WITH ASP NET AJAX

#endregion}Limitations on Returning Complex Data in XMLThe previous example demonstrates one way to deal with multiple elements of return data. Ultimately,any situation that demands that you return multiple elements of data must somehow be packaged andrepresented in a string format. One of th[r]

dential against. The user ID and password are checked against the data store on the initial request. If theinitial request is granted, the user is typically granted a token in the form of a browser-side cookie. Thisbrowser-side cookie shows that the user has been granted access. Subsequent checks in[r]

Response.Error object, then the exception will contain more informationthan just the exception text, such as Stack, TargetSize, and Source information.❑ Ajax.NET Pro supports a token concept that tries to confirm that requests are coming from clientsthat you originally served co[r]

Chapter 1114_78544X ch11.qxp 7/18/06 3:17 PM Page 296How It WorksNow take a look at the details of the example:1. The page is set up just like any other page that uses Atlas. The page has the ScriptManageralong with a reference to a web service.2. There is a <serviceMethod&g[r]

Checking for Null ValuesIf the error property is null, there is no error, at least not one that was sent back withthe response object. If the value property is null, the server didn’t return any values,and if the context is null, no context was originally set up. But no matter what theymean, usually[r]

The {1} placeholder represents the:“WebForm_InitCallback()”JavaScript code, which collects and prepares the form data to post to the server for the callback to theserver to be correctly interpreted and trapped by the ASP.NET runtime engine. This is crucial so thatthe correct server-sid[r]

trace(value, label), 369translate(string1, string2,string3), 372true(), 367unordered((item1, item2, )), 371unparsed-entry-uri, 366upper-case(string), 372year-from-date(date), 368year-from-dateTime(datetime), 368years-from-duration(datetimeduration), 367micro-contentAnthem.NET server-side fram[r]

string2) occurs in string1.substring-after(string1, This method returns the end of string1 after string2 occurs string2) in string1.matches(string, pattern) This method returns true if the string argument matches thespecified pattern.replace(string, pattern, This method returns a string that is made[r]

is dropped onto a page using Visual Studio .NET 2005, asynchronous callback functionality is enabled.The EnableClientScript property determines this behavior and is set to true by default. The effectthat this has is that when a node within the TreeView is clicked and that node has some subnod[r]

115Data Communication: XML, XSLT, and JSON08_78544X ch05.qxp 7/18/06 3:15 PM Page 115 </xsl:otherwise></xsl:choose>In this example, the expression is tested. When the expression is true, the code within the<xsl:when></xsl:when> tags is executed[r]

As you will see, this chapter covers the full range of areas involving Ajax application development —from the client side, with examination of DOM, HTML, and JavaScript, to the server side, withASP.NET and the associated server-side language. In addition, we will e[r]

</script>Now that both of the UpdatePanel controls are set to have anUpdateModeofConditional, when runningthis page, you will see the results presented in Figure 19-15.Figure 19-15In this case, only the right Label control,Label1, was updated with the asynchronous request eventh[r]

❑ Mapping to a relational database model may be difficult— Complex XML layouts may noteasily map to a relational database model.History of XMLXML can trace its heritage back to the mid 1960s with roots in Generalized Markup Language (GML) fromIBM. SGML is based on the GML work done at IBM. SG[r]

Atlas Client ScriptOn the surface, Atlas sounds like just another Ajax library that happens to be from Microsoft.While Atlas does provide support for Ajax-style operations, Atlas provides so much more thanthat. With the Microsoft Atlas package, there is support for genera[r]

extensionsNow that you have looked at some of the client-side building blocks of Atlas, the next chapter will buildon this and will look at the controls provided by the Atlas framework.284Chapter 1013_78544X ch10.qxp 7/18/06 3:17 PM Page 28411Atlas ControlsThis chapter introduces the concept[r]

Figure 10-9 shows the output of the preceding code. In this example, the content from the called page iscontained within the debug.dump statement as expected. In the preceding example, a call is made out toa web page in the same directory, and its contents are displayed.Figure 10-9Sys.Data.Da[r]

182, 186–188Web.Enum class, 280WebResource.axd HTTP handler, 250well-formed XML documents, 106–108when element (XSLT), 365while loop (JavaScript), 41–42Windows authentication, 312–313with-param element (XSLT), 365wrapper library, 159writing statements (JavaScript), 13–14XX Path 2.0 Pro[r]

6. Choose C# as the language.7. Click OK.231Other Ajax Frameworks for .NET12_78544X ch09.qxp 7/18/06 3:16 PM Page 231Referencing ComfortASP.NET1. In the Solution Explorer, right-click on the project name and select Add ASP.NET Folder.2. Choose App_LocalResou[r]

The page will provide initial clues that parts of the page are editable by drawing a border over the textwhen the cursor hovers over the editable area. Figure 9-10 shows how the control will look when themouse is hovering over the control.226Chapter 912_78544X ch09.qxp 7/18/06 3:16 PM Page 226Figure[r]

own tradeoff.Some frameworks require you to inherit from a base class; others give you the option or have no require-ment at all. Some frameworks wrap up Ajax functionality by abstracting all JavaScript calls to the server;others allow you to use JavaScript to directly invoke server methods.H[r]