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The FOR XML RAW Mode As its name suggests, the FOR XML RAW mode is the least rich mode in terms of features and options. When designed using this mode, the query returns an XML fragment that, at a first glance, might look a lot like the fragment produced by the FOR XML AUTO option. You obtain an XML fragment made of <row> nodes with as many attributes as the columns. For example, consider the following simple query: SELECT CustomerID, ContactName FROM Customers FOR XML RAW The output is shown here: <row CustomerID="ALFKI" ContactName="Maria Anders" /> <row CustomerID="ANATR" ContactName="Ana Trujillo" /> ... You can't change the name of the node, nor can you render attributes as nested nodes. So far, so good the RAW mode is only a bit less flexible than the AUTO mode. However, the situation changes when you use joined tables. The schema of XML data remains intact even when you process multiple tables. The INNER JOIN statement from the previous section run in FOR XML RAW mode originates the following output: <row CustomerID="ALFKI" ContactName="Maria Anders" OrderID="10643"/> <row CustomerID="ALFKI" ContactName="Maria Anders" OrderID="10692"/> <row CustomerID="ALFKI" ContactName="Maria Anders" OrderID="10783"/> ... Even with the naked eye, you can see that the RAW mode produces a less optimized and more redundant output than the AUTO mode. The ELEMENTS clause is not supported in RAW mode, whereas XMLDATA and BINARY BASE64 are perfectly legitimate. Limitations of FOR XML The FOR XML clause is not valid in all cases in which a SELECT statement is acceptable. In general, FOR XML can be used only when the selection produces direct output going to the SQL Server client, whatever that output is. Let's review a couple of 286

if ([myText.text compare:@"Type Text Here."] == NSOrderedSame) { myText.text = [NSString string]; } keyboardIsActive = YES; } - (void)textViewDidEndEditing:(UITextView *)textView { [textView.text writeToFile:filePath atomically:YES encoding:NSASCIIStringEncoding error:NULL]; keyboardIsActive = NO; } ... @end

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Now that the control stores more information in the ViewState, the HTML response resulting from postbacks increases in size as the _VIEWSTATE field in the response grows . Add a few more palindromes to the page and view the source that s sent to the browser each time . You ll see the VIEWSTATE hidden field grow in size with each postback . The caveat here is that introducing controls that use view state increases the size of the HTTP payload coming back to the browser . Use the view state judiciously because overuse can bog down a site s performance .

Validating XML Fragments As mentioned, the XmlValidatingReader class has the ability to parse and validate entire documents as well as XML fragments. To parse an XML fragment, you must resort to one of the other two constructors that the XmlValidatingReader class kindly provides, as shown here:

full-featured. In this section we will cover the three main tools used to manage server roles on full installations of Windows Server 2008, paying particular attention to the security implications of each.

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your services to provide a service level agreement (SLA) to your clients, assuring them of a certain uptime of servers, workstations, and so on. Alternatively, you can just use these tools on demand for your break/fix client base to alert you to issues. An administrator can move on to other duties when all he or she has to do is a quick check of the SCE dashboard, shown in Figure 15-14, to determine that everything is running normally.

Solution to Question 14-1. Indexers are unnamed. You use the this keyword to create an indexer:

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Using a named constant is a way of parameterizing your program putting an aspect of your program that might change into a parameter that you can change in one place rather than having to make changes throughout the program. If you have ever declared an array to be as big as you think it will ever need to be and then run out of space because it wasn t big enough, you can appreciate the value of named constants. When an array size changes, you change only the definition of the constant you used to declare the array. This single-point control goes a long way toward making software truly soft easy to work with and change.

For example, you can specify that the Text property of a control display a short string for a mobile phone but a longer string for a device that supports a larger viewing area.

} } } 4. Now that the class is built, in the MainPage.xaml file, change the width of the UserControl to be 500 and add a DataGrid named grdData to the root Grid by double-clicking the DataGrid control in the Toolbox. Add a 15-pixel margin around the DataGrid for some spacing, and set the AutoGenerateColumns property to False. The code follows:

module Country class Ruler attr_accessor :name end end a = ToolBox::Ruler.new a.length = 50 b = Country::Ruler.new b.name = "Ghengis Khan from Moskau" Rather than having the Ruler classes fighting it out for supremacy, or ending up with a mutant Ruler class with both name and length attributes (how many measuring rulers have names ), the Ruler classes are kept separately in the ToolBox and Country namespaces. You ll be looking at why namespaces are even more useful than this later, but first you have to look at the second reason why modules are so useful.

southern position of a BorderLayout panel. (The other component, added to the center position, is the main game view, in case you re wondering.) Exactly how the JavaFX object is turned into a Java object is hidden behind the mysterious getJavaFX() method, which will surrender its secrets next.

Save the change and exit Notepad. Keep the elevated command prompt open. You ll need it in the next section.