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We ve had a quick look at controllers, in which our controller only rendered strings. What if we want to render views Much as in Sinatra, if a view with the right filename is present, that view will be rendered from the file. Before we can give that a try, however, we need to look more at Ramaze s approach to templates generally. Template Engines and Ezamar Ramaze prides itself on its flexibility in allowing developers to use almost any templating solution (at the time of writing, 11 options are confirmed on the Ramaze homepage). By default, however, it uses its own homebrew templating engine called Ezamar (based on the templating engine used in the Og/Nitro framework). The views that come by default with a new Ramaze application use Ezamar, and show it in action quite well. For example, consider the view/page.xhtml template, used as a layout in the default app: < xml version="1.0" > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ""> <html xmlns=""> <head> <title>#{@title}</title> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="expires" content="0" /> <meta name="description" content="Description for search engines" /> <meta name="generator" content="Ramaze #{Ramaze::VERSION}" /> <meta name="keywords" content="Ramaze, Your own keywords" />
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The preceding example retrieves an IDataReader from the query operation . The IDataReader interface is useful for iterating through the results of the query . Listing 10-7 shows part of the IDataReader interface .
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This generates the following output:
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1. 2. 3.
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If you are not familiar with NUnit, it is an open source unit testing framework. It is very similar to the unit testing tools that are available in the team versions of Visual Studio, which have speci c tasks and targets. You can learn more about NUnit at its homepage, NUnit is not the only alternative to Visual Studio tests; another tool is, and there are many others. If you are using NUnit to test your applications, then you should automate running NUnit as a part of your build process. There are a few different ways to achieve this. One of the best options is to use the NUnit task that is available from the MSBuild Community Tasks, We will rst take a look at this task and then describe how to effectively utilize it. Table 7-3 describes the properties that are available on the NUnit task.
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System.Security System.Text System.Threading System.Xml
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focus on what we think are critical points. When Mark clicked the remote control button, it signaled his laptop computer to advance to the rst image in the PowerPoint presentation. Although the jurors could not see the laptop below the jury box, they did see an image of Carol and Bob appear on the 10-foot screen directly behind Mark, as illustrated in Figure 1-3. From where the jurors sat, it appeared that Mark was in a giant television set, as the images on the screen would soon start dissolving and changing behind him in a seamlessly choreographed media experience.
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Table 15-2: DeadlockDetection Reporting Options 540
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Filtering by Severity in a Trace Listener The previous example generates a third disk file that we haven t looked at yet. We didn t forget this, but saved if for this section because it demonstrates another feature of the trace listeners that you will often find extremely useful. To see this, you need to view the file XmlLogFile.xml that was generated in the C:\Temp folder by the XML trace listener we used in the previous example. You should open it in Microsoft Internet Explorer (or another Web browser or text editor) to see the structure. You will see that the file contains only one event from the previous example, not the three that the code in the example generated. This is because the XML trace listener has the Filter property in its configuration set to Error. Therefore, it will log only events with a severity of Error or higher. If you look back at the example code, you will see that only the last of the three calls to the Write method specified a value for the severity (TraceEventType.Critical in this case), and so the default value Information was used for the other two events. If you get an error indicating that the XML document created by the XML trace listener is invalid, it s probably because you have more than one log entry in the file. This means that it is not a valid XML document it contains separate event log entries added to the file each time you ran this example. To view it as XML, you must open the file in a text editor and add an opening and closing element (such as <root> and </root>) around the content. Or, just delete it and run the example once more. All of the trace listeners provided with Enterprise Library expose the Filter property, and you can use this to limit the log entries written to the logging target to only those that are important to you. If your code generates many information events that you use for monitoring and debugging only under specific circumstances, you can filter these to reduce the growth and size of the log when they are not required. Alternatively, (as in the example) you can use the Filter property to differentiate the granularity of logging for different listeners in the same category. It may be that a flat file trace listener will log all entries to an audit log file for some particular event, but an Email trace listener in the same category will send e-mail messages to administrators only when an Error or Critical event occurs. Filtering All Log Entries by Priority As well as being able to filter log entries in individual trace listeners based on their severity, you can set the Logging block to filter all log entries sent to it based on their priority. Alongside the log-enabled filter and category filter in the Filters section of the configuration (which we discussed earlier in this chapter), you can add a filter named Priority Filter. This filter has two properties that you can set: Minimum Priority and Maximum Priority. The default setting for the priority of a log entry is -1, which is the same as the default setting of the Minimum Priority property of the filter, and there is no maximum priority set. Therefore, this filter will not block any log entries. However, if you change the defaults for these properties, only log entries with a priority between the configured values (including the specified maximum and minimum values) will be logged. The exception is log entries that have the default priority of -1. These are never filtered.
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Figure 9-12. The completed grid layout 1. In Expression Blend, create a new Silverlight 3 Application + Website project named Ch9_BlendLayout. The MainPage.xaml file will be opened automatically, and as usual, a root Grid named LayoutRoot will be present. First, create the column definitions. To do this, at about 25% from the left of the top blue grid ruler, click the ruler to place a grid divider, as shown in Figure 9-13. If you examine the XAML, you will notice that the <Grid.ColumnDefinitions> element has been added, along with two <ColumnDefinition> elements, as follows (note that your percentages do not need to be exact):
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16 Service Broker
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// DEMO 3: Cross-AppDomain Communication using non-marshalable type *** Console.WriteLine( {0}Demo #3 , Environment.NewLine); // Create new AppDomain (security & configuration match current AppDomain) ad2 = AppDomain.CreateDomain( AD #2 , null, null); // Load our assembly into the new AppDomain, construct an object, marshal // it back to our AD (we really get a reference to a proxy) mbrt = (MarshalByRefType) ad2.CreateInstanceAndUnwrap(exeAssembly, MarshalByRefType ); // The object s method returns an non-marshalable object; exception NonMarshalableType nmt = mbrt.MethodArgAndReturn(callingDomainName); // We won t get here... }
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