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FIGURE 8-2 Detecting your network router
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McConnell, Steve. Rapid Development. Redmond, WA: Microsoft Press, 1996. 7 on Lifecycle Planning goes into much detail about the tradeoffs involved with more flexible and less flexible lifecycle models. s 20, 21, 35, and 36 discuss specific lifecycle models that support various degrees of incrementalism. 19 describes designing for change, a key activity needed to support iterative and incremental development models. Boehm, Barry W. A Spiral Model of Software Development and Enhancement. Computer, May 1988: 61-72. In this paper, Boehm describes his spiral model of software development. He presents the model as an approach to managing risk in a software-development project, so the paper is about development generally rather than about integration specifically. Boehm is one of the world s foremost expert on the big-picture issues of software development, and the clarity of his explanations reflects the quality of his understanding. Gilb, Tom. Principles of Software Engineering Management. Wokingham, England: Addison-Wesley, 1988. s 7 and 15 contain thorough discussions of evolutionary delivery, one of the first incremental development approaches. Beck, Kent. Extreme Programming: Embrace Change, Reading, Mass.: Addison Wesley, 2000. This book contains a more modern, more concise, and more evangelical presentation of many of the ideas in Gilb s book. I personally prefer
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Enables applications to specify execution of threads in a specific order within a given time frame . Used for high performance applications . Enables access to the Trusted Platform Module (TPM) to provide hardware-based cryptographic services to system components and applications . Allows the operating system to send UPnP announcements on behalf of non-computer peripherals, such as printers and cameras . The peripheral must provide the drivers and software to support UPnP . Loads and unloads User Profiles and is vital to the logon and logoff process .
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Part I CLR Basics
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without saying that Microsoft is still strongly committed to supporting XML the COM way, although this does not necessarily mean that we are going to have an MSXML 5.0 anytime soon. However, MSXML 4.0 represents an excellent parser for the Windows platform and has been updated to support W3C final recommendations for the XML Schema. COM and .NET Framework XML Core Services The first difference between MSXML and .NET Framework XML core classes that catches the eye is the fact that while MSXML supports XMLDOM and SAX parsers, the .NET Framework supplies an XMLDOM parser and XML readers and writers. (More on readers shortly.) This is just the most remarkable example of a common pattern, however. Quite a few key features of MSXML are apparently not supported in the .NET Framework XML core classes, but this hardly results in a loss of programming power. In general, the biggest (and perhaps the only significant) difference between MSXML and .NET Framework XML classes is that the former represents a set of classes fully integrated into an all-encompassing, self-contained framework. Several functionalities that MSXML has to provide on its own come for free in the .NET Framework from other compartments. If you happen to use a certain MSXML function and you don't find a direct counterpart in the .NET Framework, check out the MSDN documentation before you panic. In the paragraphs that follow, we'll look at a few examples of .NET Framework functionality that provide the equivalent of some MSXML functionality. MSXML supports asynchronous loading and validation while parsing. The .NET Framework XMLDOM parser, centered around the XmlDocument class, does not directly provide the same features, but proper use of the resources of the .NET Framework will let you obtain the same final behavior anyway. MSXML also provides for a multithreaded HTTP client (the XmlHttp object) capable of issuing both synchronous and asynchronous calls to a remote URL. A similar feature is certainly available in the .NET Framework, but it has nothing to do with XML classes. If you just want your application to act as an HTTP client, use some of the classes in the System.Net namespace (for example, HttpWebRequest and HttpWebResponse). In general, if you loved MSXML, you'll love .NET Framework XML classes too. The overall programming interface, especially for XMLDOM processing, is similar, although the underlying implementation is radically different, and several methods and properties have been renamed. Note In MSXML 4.0, Microsoft introduced the same level of support for some relatively newer XML standards that are found in .NET Framework XML core classes in particular, XSD, the XML Schema object model, and XPath. If you look at MSXML 3.0, however, the differences between managed and unmanaged XML processing are clearer.
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In the Function 2 VLOOKUP worksheet, you can enter a search criterion (the lookup_value; in this case, a text string) in cell D14, which has a yellow background . This search criterion must be found in the D16:D21 source data range . Cell E14 contains the formula =VLOOKUP($D$14,$D$16:$N$21,E$12,FALSE), which serves as an example for all formulas in the green cell range E14:N14 . The instruction to Excel is therefore as follows: Find the the lookup_value defined in cell D14 in the first column of the array located in cell range $D$16:$N$21 . This will determine the correct row in the array . Then find the column in the array whose position is defined by the value entered in cell E$12. In the example shown here (Figure 2-5), the value in cell E19 is read as a result . This is the point at which the row that has the entry TPM-D in the first column in the array intersects with the second column in the array . The VLOOKUP function is always particularly useful if the array is known, but the values to be determined are always located in different row positions (for example, if arrays are sorted randomly) . Note The VLOOKUP function has an equivalent function with a similar syntax . This is the
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The following are examples of Oracle software components: SQL Plus and SQL Developer: These two tools stay the closest to the SQL language and are ideal for interactive, ad hoc SQL statement execution and database access. These are the tools we will mainly use in this book. SQL Plus is a command line tool while SQL Developer is a graphical database administration and development tool.
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as Nullable<Nullable<T>> . Nullable types are discussed in 19, Nullable Value Types . Here is an example class that constrains its type parameter by using the struct constraint:
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Service account dependencies occur when the same identity is used to run a service in multiple places. Suppose you use a network-wide Enterprise Management Solution (EMS). The EMS package includes an agent that runs on all computers to enable remote deployment of software, remote management, and all kinds of other goodness. The agent runs as the _DomainTools account. The _DomainTools account obviously needs to have elevated privileges on all the members to enable this type of remote management. This creates a service account dependency between all the computers where the _DomainTools account has high privileges. If any one of those computers is compromised, all of them are potentially compromised because the attacker now has access to a highly privileged account.
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In a value type s constructor, this represents an instance of the value type itself and you can actually assign to it the result of newing up an instance of the value type, which really just zeroes out all the fields . In a reference type s constructor, this is considered read-only and so you cannot assign to it at all .
indows Small Business Server 2008 Premium includes a full copy of Windows Server 2008 Standard that can be used for any purpose desired, as long as it s installed on the SBS network. SBS Premium includes both 32-bit and 64-bit versions of Windows Server 2008, so you can choose the option that makes the most sense in your network environment. We, of course, are going with 64-bit for our own SBS network. Because the second server is full Windows Server 2008 Standard, you can install any of the normal roles and features on the server as you would any other copy of Windows Server 2008 Standard, including Hyper-V and Terminal Services. Windows Server 2008 Standard includes 1+1 virtualization licensing, allowing for virtualization of a single instance of Windows Server as a child partition but only if the parent partition is used solely for the Hyper-V role. We think a very interesting scenario will be to install the second server as a Hyper-V parent and then install the second server again virtualized to support any additional roles and features, including Microsoft SQL Server (covered in 24, Introducing SQL Server 2008 Standard Edition for Small Business ) and the Terminal Server Role (covered in 25, Adding a Terminal Server ). Another choice for some environments will be to install the second server as an additional domain controller. This can make a lot of sense if the second server will be used to support a remote site; for example, where a local infrastructure server, with Active Directory Domain Services, DNS, DHCP, File Server, and Print Server roles would likely be installed.
16. Database Connectivity // Instantiate and add parameters, return value must be first sqlCmd.Parameters.Add("@oldAge", SqlDbType.Int).Direction = ParameterDirection.ReturnValue; sqlCmd.Parameters.Add("@name", SqlDbType.VarChar).Value = p_name; sqlCmd.Parameters.Add("@age", SqlDbType.Int).Value = p_age; sqlCmd.Parameters.Add("@sex", SqlDbType.VarChar, 10).Direction = ParameterDirection.Output; // Execute the stored procedure sqlCmd.ExecuteNonQuery(); // Display the return information Console.WriteLine("{0} was {1} years old and is a {2};" + "{0} is now {3} years old.", sqlCmd.Parameters["@name"].Value, sqlCmd.Parameters["@oldAge"].Value, sqlCmd.Parameters["@sex"].Value, sqlCmd.Parameters["@age"].Value); }
Threading How Windows does Synchronous I/O
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Practice 1 Return to the LabeledTextbox control created earlier in this chapter. Convert this control to a custom web server control with a layout that is based on templates. Practice 2 Practice adding the templated control to several webpages and defining different layouts.
Ch apt er 12 tYING It tOG ether : DeVeL O p I NG a La r G e r r U B Y a p p LI C a t I O N
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