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In this example, we can see that no properties have been declared and no other les are imported. Inside the target, PrintEnvVar, we can see that we have made a few messages to print the values of some properties. These values are being pulled from the environment variables. When you use the $(PropertyName) syntax to retrieve a value, MSBuild will rst look to see if there is a corresponding property. If there is, its value is returned. If there isn t, then it will look at the environment variables for a variable with the provided name. If such a variable exists, its value is returned. If you execute the command msbuild.exe Properties04.proj /t:PrintEnvVar you should see a result similar to that shown in Figure 2-3.

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Number of bits required for subnet ID Number of bits left for host ID Network prefix version of subnet mask Dotted-decimal version of subnet mask 2

... } The base class is for the most part abstract, thus requiring you to override several methods and properties When designing an XML reader, a key step is defining the XML virtual tree that underlying data will populate In this case, we'll try for a relatively simple XML schema that closely resembles the schema of the FOR XML RAW mode, as shown here: <row field1=".." field2=".." .. /> <row field1=".." field2=".." .. /> .. The XmlDataReader class features only one constructor, which takes any object that implements the IDataReader interface The programming interface of a data reader object like OleDbDataReader and SqlDataReader consists of two distinct groups of functions: the IDataReader and IDataRecord interfaces The former includes basic methods such as Read, Close, and GetSchemaTable The latter contains specific reading methods including GetName, GetValue, and the Item indexer property.

Once your network is fully deployed, you must ensure that the nodes on your network have adequate bandwidth to handle the job. Like air is to humans, bandwidth is to applications without it, they both suffocate. To that end, Windows Server 2003 pro vides several built-in tools that enable you to monitor your network performance. Monitoring the network can help you isolate specific problems and discount others. Therefore, you will need to know specifically how to monitor the network using Windows Server 2003. This section covers three tools that can help you when you encounter trouble areas. First, you explore the easy-to-use Network tab in Task Manager. Then you leverage what you learn there and move on to configuring triggers by using the Performance console. Finally, you explore some of the advanced capturing features found in Network Monitor.

don t place the SortExpression property in the control s view state, the sort expression will be lost as soon as the control renders to the browser. To work around the issue, you implement a get and set accessor for the property that reads from and writes to the view state. This is a solution you can be proud of. But what happens if the control is used in a page that has the view state disabled In ASP.NET 1.x, the control feature just stops working. You might see unexpected behaviors (that cause will you headaches) when you use rich custom controls especially if these controls are not well documented.

By making the constructor accept a reference to the IDataReader interface, you enable the XmlDataReader class to support any data reader object Internally, the class defines the following private properties: protected IDataReader m_dataReader; protected IDataRecord m_dataRecord; protected ReadState m_readState; protected int m_currentAttributeIndex; The idea is to map the reading methods of the XmlDataReader class to the data reader object and use the m_currentAttributeIndex member to track down the currently selected attribute, as shown in the following code Of course, each XML attribute corresponds to a column in the underlying result set public XmlDataReader(IDataReader dr) { m_dataReader = dr; m_readState = ReadStateInitial; m_dataRecord = (IDataRecord) dr; m_currentAttributeIndex = -1; } Notice that the same object is passed as a reference to IDataReader but can also be cast to IDataRecord.

Then, all you need to do is load this configuration into a new Unity container. This requires just one line of code, as shown here.

This is possible as long as the real object implements both interfaces, but for data reader objects this is true by design The XmlDataReader Implementation Let's review the implementation of a few properties and methods to grasp the essence of the reader, as shown in the following code The entire source code is available for download in this book's sample files // Return the number of attributes (for example, the field count) 300.

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